Production and quality of sorghum silage intercropped with marandu grass and pigeonpea / Produção e qualidade de silagem de sorgo consorciado com capim marandu e feijão guandu

Lack of forage in the winter dry season is a concern for cattle production in tropical Brazil. Pasture renovation with silage production might solve an immediate concern for forage production and help develop an improved pasture condition after cropping. The present study was focused to compare the production and quality of monocropped sorghum and sorghum intercropped with Marandu grass and/or pigeonpea in two row spacings. The experiment was carried out on a sandy Oxisol in São Paulo state in Brazil with an experimental design of a 2 x 4 factorial arrangement with four replications. Treatments were: monocropped sorghum,sorghum intercropped with Urochloa brizantha, sorghum intercropped with Cajanus cajan(cv. BRS Mandarim), and sorghum intercropped with Urochloa+ pigeonpea with 0.45 and 0.90 m row spacings. Greatest forage production was with 0.45-m spacing for monocropped sorghum and dual-species intercropping. With 0.90-m spacing, greatest production was for Sorghum+Urochloa. Sorghum+Urochloa+Cajanusintercropping provided the highest concentrations of crude protein in silage, regardless of row spacing. An increase in ensiling time reduced quality of the silage due to a decline in crude protein and TDN and an increase in fibers. However, the reduced spacing between lines with the inclusion of legumes resulted in a greater amount of silage with a higher concentration of protein.(AU)

A falta de forragem na estação seca é uma preocupação para os produtores de carne bovina no Brasil. A renovação de pastagens com produção de silagem pode se constituir emuma alternativa para a produção de alimento para o período seco do ano e, ao mesmo tempo, porporcionar a formação de pastagem de melhorar qualidade. O presente estudo teve como objetivo comparar a produção e a qualidade da silage de sorgo em monocultivo e consorciado com capim-marandu e/ou feijão-guandu em dois espaçamentos entre linhas. O experimento foi conduzido em Latossolo arenoso no estado de São Paulo com delineamento experimental em arranjo fatorial 2 x 4, com quatro repetições. Os tratamentos foram: sorgo em monocultivo, sorgo consorciado com Urochloa brizantha, sorgo consorciado com Cajanus cajan(cv. BRS Mandarim) e sorgo consorciadocom U. brizantha +C. cajancom espaçamento de 0,45 e 0,90 m. A maior produção de forragem foi obtida com espaçamento de 0,45 m para sorgo monocultivo eno consórico de duas espécies. Com espaçamento de 0,90 m, a maior produção foi para sorgo+U. brizantha. O consórcio sorgoU. brizantha+C. cajanproporcionou as maiores concentrações de proteína bruta na silagem, independentemente do espaçamento entre linhas. O aumento do tempo de ensilagem reduziu a qualidade da silagem devido à queda de proteína bruta e NDT e aumento de fibras. Oespaçamento reduzido entre linhas,com a inclusão de leguminosas resultou em maior quantidade de silage,e maior concentração de proteína.(AU)

Fermentation dynamics and quality of maize silage with Pigeon pea / Dinâmica da fermentação e qualidade da silagem de milho com feijão guandu

Tropical legumes are used to prepare mixed silages to enrich the crude protein (CP) content. In This context, objective of this study was to evaluate the dynamics of fermentation and quality of maize silage with different levels of Pigeon pea. The experimental design was entirely randomized, with four repetitions. The treatments comprised maize silages with six levels of added Pigeon pea (0, 20, 40, 60, 80, and 100%), calculated based on natural matter. The maize hybrid and Pigeon pea varieties used were B 2800 PWU and Cajanus cajan cv. BRS Mandarin, respectively. For the silage, the maize and Pigeon pea were harvested when they reached 335.7 g kg-1 dry matter (DM) and 281.3 g kg-1 DM, respectively. The results revealed that the added of up to 40% Pigeon pea in maize silages promote nutritive increment without compromising their fermentative profile of the silage. Exclusive Pigeon pea silage (100%) undergoes fermentative losses that compromise the silage quality. Therefore, mixed silages of maize with Pigeon pea, with appropriate levels of addition, are a viable alternative to increase the nutritive value of silages, mainly the CP content, contributing to reducing the cost of acquisition of protein salts.

As leguminosas tropicais têm sido utilizadas para a confecção de silagens mistas para enriquecer os teores de proteína bruta (PB). Neste contexto, o objetivo deste estudo foi avaliar a dinâmica da fermentação e qualidade da silagem de milho com níveis de feijão guandu. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições. Os tratamentos foram constituídos da silagem de milho com seis níveis de feijão guandu (0; 20; 40; 60, 80 e 100%), calculado com base na matéria natural. O híbrido de milho e a variedade de feijão guandu utilizados foram o B 2800 PWU e o Cajanus cajan cv. BRS Mandarim, respectivamente. Para a ensilagem, o milho e o feijão guandu foram colhidos quando atingiram 335,7 g kg-1 de MS (matéria seca) e 281,3 g kg-1 MS, respectivamente. Os resultados mostraram que a adição de até 40% de feijão guandu na ensilagens de milho promove incremento nutritivo sem comprometer o seu perfil fermentativo da silagem. Silagem exclusiva de feijão guandu apresenta perdas fermentativas que compromete a qualidade da silagem. Portanto, silagens mistas de milho com feijão guandu, combinadas com níveis adequados de adição, torna-se alternativa viável para incrementar o valor nutritivo da silagem, principalmente os teores de PB, contribuindo com redução do custo com aquisição de sais proteínados.

Legume inclusion or nitrogen fertilization on Aruana grass overseeded with temperate grasses: Performance, carcass characteristics, and fatty acid profile of the meat of beef steers

The objective of our study was to evaluate the effect of the use of legume (Arachis pintoi) or nitrogen fertilization on animal performance, characteristics of carcass and meat, and fatty acids profile of crossbred steers on Megathyrsus maximus cv. Aruana pasture, overseeded with temperate grasses. The experimental design was completely randomized, with three treatments and three replicates. The experiment was carried out from June to October (127 d). The treatments were: Low-N: 100 kg of N/ha; Medium-N: 200 kg of N/ha; and Legume: Arachis pintoi + 100 kg of N/ha. The pasture with higher nitrogen fertilization (N200) showed a more significant forage mass yield. The mixed grass with legumes presented a higher concentration of saturated fatty acids and saturated:unsaturated ratio in the meat. However, the grass pastures resulted in a higher content of unsaturated fatty acids in the meat. The other pasture variables, and characteristics of carcass and meat were not influenced by the treatments. The increase in nitrogen fertilization, from 100 to 200 kg/ha, and Arachis pintoi mixed with Aruana grass pasture overseeded with black oat and ryegrass does not affect the daily weight gain and the carcass and meat characteristics of the steers. The grass-legume mixture decreases the total concentration of unsaturated fatty acids in meat without influencing the concentration of polyunsaturated fatty acids.(AU)

Fermentation dynamics and quality of maize silage with Pigeon pea / Dinâmica da fermentação e qualidade da silagem de milho com feijão guandu

Tropical legumes are used to prepare mixed silages to enrich the crude protein (CP) content. In This context, objective of this study was to evaluate the dynamics of fermentation and quality of maize silage with different levels of Pigeon pea. The experimental design was entirely randomized, with four repetitions. The treatments comprised maize silages with six levels of added Pigeon pea (0, 20, 40, 60, 80, and 100%), calculated based on natural matter. The maize hybrid and Pigeon pea varieties used were B 2800 PWU and Cajanus cajan cv. BRS Mandarin, respectively. For the silage, the maize and Pigeon pea were harvested when they reached 335.7 g kg-1 dry matter (DM) and 281.3 g kg-1 DM, respectively. The results revealed that the added of up to 40% Pigeon pea in maize silages promote nutritive increment without compromising their fermentative profile of the silage. Exclusive Pigeon pea silage (100%) undergoes fermentative losses that compromise the silage quality. Therefore, mixed silages of maize with Pigeon pea, with appropriate levels of addition, are a viable alternative to increase the nutritive value of silages, mainly the CP content, contributing to reducing the cost of acquisition of protein salts.(AU)

As leguminosas tropicais têm sido utilizadas para a confecção de silagens mistas para enriquecer os teores de proteína bruta (PB). Neste contexto, o objetivo deste estudo foi avaliar a dinâmica da fermentação e qualidade da silagem de milho com níveis de feijão guandu. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições. Os tratamentos foram constituídos da silagem de milho com seis níveis de feijão guandu (0; 20; 40; 60, 80 e 100%), calculado com base na matéria natural. O híbrido de milho e a variedade de feijão guandu utilizados foram o B 2800 PWU e o Cajanus cajan cv. BRS Mandarim, respectivamente. Para a ensilagem, o milho e o feijão guandu foram colhidos quando atingiram 335,7 g kg-1 de MS (matéria seca) e 281,3 g kg-1 MS, respectivamente. Os resultados mostraram que a adição de até 40% de feijão guandu na ensilagens de milho promove incremento nutritivo sem comprometer o seu perfil fermentativo da silagem. Silagem exclusiva de feijão guandu apresenta perdas fermentativas que compromete a qualidade da silagem. Portanto, silagens mistas de milho com feijão guandu, combinadas com níveis adequados de adição, torna-se alternativa viável para incrementar o valor nutritivo da silagem, principalmente os teores de PB, contribuindo com redução do custo com aquisição de sais proteínados.(AU)

Fontes alternativas de nitrogênio para intensificação da produção do capim Zuri / Alternative sources of nitrogen for intensification of Zuri guineagrass production

A intensificação de produção das pastagens no Brasil é altamente dependente da adubação nitrogenada. O objetivo foi avaliar a produtividade do capim Zuri, em manejo de cortes sucessivos, quando submetido ao consórcio com leguminosas forrageiras e incorporação de resíduos orgânicosem substituição à adubação com ureia. Foi utilizado o delineamento em blocos completos casualizados, com seis fontes de nitrogênio (ureia; esterco bovino; cama de frango; nabo forrageiro; amendoim forrageiro; calopogônio e soja perene), em quatro repetições. Os resíduos e a ureia foram aplicados no início do experimento e a semeadura das leguminosas forrageiras foi realizado no mesmo dia do capim. Foram realizados três cortes no capim, quando este atingiu 90 cm de altura. Avaliaram-se os seguintes parâmetros: altura, índice relativo de clorofilas, biomassa fresca e seca da parte aérea, concentração de nitrogênio, percentual de proteína e no terceiro corte, a quantidade de perfilhos e o perfilhamento. Observou-se também que houve boa produção do capim, expresso pelos índices de biomassa fresca e biomassa seca, bem como com a alta produção, independente do tratamento utilizado. É possível obter alta taxa de crescimento e desenvolvimento do capim Zuri, expresso pelo perfilhamento e produção de biomassa seca, com fornecimento de N com o uso de qualquer uma das fontes nitrogenadas utilizadas.(AU)

The intensification of pasture production in Brazil is highly dependent on nitrogen fertilization. The aim was to evaluate the productivity of Zuri guineagrassin the management of successive cuts when submitted to intercropping with forage legumes and incorporation of organic residues in replacement of fertilization with urea. In four replication,arandomized complete block design was used, with six nitrogen sources (urea; cattle manure; chicken litter; forage radish; forage peanut; calopogonion and perennial soybean). The residues and urea were applied at the beginning of the experiment and the sowing of forage legumes was carried out on the same day as the grass. Three cuts were made in the grass when it reached 90 cm in height. The following parameters were evaluated: height, relative chlorophyll index, fresh and dry aboveground biomass, nitrogen concentration, protein percentage,and in the third cut, the number of tillers and tillering. It was also observed that there was a better guineagrass production, expressed by fresh and dry biomass indices, as well as with high production, regardless of the treatment used. It is possible to obtain a high growth rate and development of Zuri guineagrass, expressed by tillering and dry biomass production, with N supply using any of the nitrogen sources used.(AU)

Warm-climate, legume-grass forage mixtures versus grass-only swards: An ecosystem services comparison

Integrating warm-climate forage legumes into grass monocultures has received significant research attention during the past 70 years, but widespread adoption by end users has been elusive. The objectives of this review are to provide historical context regarding legume use in warm-climate grasslands; synthesize the current literature addressing contributions to grassland ecosystem services of warm-climate, grass-only vs. legume-grass mixed swards; and consider how to achieve more widespread adoption of legume technology in warm climates. For this review, warm-climate grasslands are considered those in areas between latitudes 30° N and 30° S, where C4 perennial grasses dominate. The literature suggests measurable advantages in animal performance, soil carbon accumulation, and nutrient cycling of legume-grass mixtures are most likely when grass-only swards receive little or no N fertilizer. Advantages are less or may disappear when mixtures are compared with grasses receiving high N fertilizer rates. In contrast, amelioration of greenhouse gas emissions is often most pronounced for mixtures when compared with grass-only swards receiving high rates of N, because of the magnitude of N fertilizer effects on emissions. Going forward, there is need to focus on selecting for, and thoroughly documenting legume persistence, achieving low-risk and affordable legume establishment methods, assessing compatibility of legumes in mixture with grasses prior to legume cultivar release, emphasizing adoption of both legume species and optimal management practices, and recognizing scientists must assume a larger and more intentional role in encouraging adoption by end-users of research innovations, in addition to our traditional role in technology and product development.(AU)

Twenty-five-centimeter pre-grazing canopy height in palisade grass and forage peanut

Short-term grazing behavior variables are sensitive to the canopy structure and have an impact on daily forage intake. This study evaluated the effect of pre- and post-grazing canopy heights on the forage harvesting process at a patch scale in a mixture of Brachiaria brizantha (Hochst. ex A. Rich.) Stapf. syn. Urochloa brizantha R.D. Webster cv. Marandu (palisade grass) and Arachis pintoi Krapov. & W.C. Greg. cv. Belomonte (forage peanut). Treatments were allocated to a split-plot arrangement in a completely randomized design. The plots, in their entirety, consisted of two pre-grazing canopy heights: 25 cm (CH25) and 35 cm (CH35); subplots consisted of three levels of defoliation severity: no defoliation (DS0); 20% depletion of pre-grazing canopy height (DS20); and 40% depletion of pre-grazing canopy height (DS40), with eight replications. Heifers were allowed to graze the patches (0.7 × 0.7 m) and their grazing behavior was recorded. Canopy structure measurements were taken both before and after grazing. Patches from CH35 presented greater stem mass for grass (p = 0.001) and legume (p = 0.002) than did patches from CH25. Bite rate, bite mass and instantaneous intake rate were greater for CH25 than for CH35 (p < 0.001, p = 0.068, and p = 0.074), and bite mass and instantaneous intake rate were lower for DS20 compared to DS0 (p = 0.032 and p = 0.016). Greater stem mass in the grazing strata negatively influenced the instantaneous intake rate.

Fermentation dynamics, nutritional quality, and heating capacity of mixed silages of elephant grass (Pennisetum purpureum Schum) and Leucaena (Leucaena leucocephala) / Dinâmica fermentativa, qualidade nutricional e capacidade de aquecimento de silagens mistas de capim elefante (Pennisetum purpureum Schum) e leucena (Leucaena leucocephala)

Leucaena has been used to make mixed silages to obtain nutritional enrichment of the silages. Thus, the inclusion of Leucaena as an additive in mixed elephant grass silages can reduce fermentation losses, and increase the nutritional value and aerobic stability of the mixed silage without changing the fermentation profile. This study evaluated the fermentation profile, nutritional composition, and aerobic stability of elephant grass silages combined with different levels of Leucaena. A total of five inclusion levels of Leucaena (0, 20, 40, 60, and 80% on a dry matter basis) were added to elephant grass silages. A completely randomized design was adopted, with 5 treatments and 3 repetitions, totaling 15 experimental silos that were opened after 30 days of sealing. Fermentation profile, chemical composition, and aerobic stability were analyzed. A descriptive analysis of temperature and pH peaks during aerobic stability was performed. The increase in the inclusion of Leucaena in the composition of silages reduced gas and effluent losses, neutral and acid detergent fiber, cellulose, lignin, total and fiber carbohydrates, and total digestible nutrients, and resulted in increased dry matter, ether extract, and crude protein. A quadratic effect of treatments was found for the temperature to reach the maximum pH (P=0.009). Aerobic stability remained constant after 40% Leucaena inclusion in the composition of elephant grass silages. The inclusion of Leucaena up to 80% in the composition of elephant grass silages reduces fermentation losses, promotes a nutritional increase, and increases the aerobic stability of the silages.(AU)

A leucena tem sido utilizada para a confecção de silagens mistas para o enriquecimento nutricional das silagens. Assim, a inclusão da leucena como aditivo em silagens mistas de capim-elefante pode reduzir as perdas fermentativas e aumentar o valor nutricional e a estabilidade aeróbia das silagens, sem alterar o seu perfil fermentativo. Objetivou-se avaliar o perfil fermentativo, composição nutricional e estabilidade aeróbia de silagens de capim elefante associadas com níveis crescentes de leucena. Um total de cinco níveis de leucena (0, 20, 40, 60 e 80% em base da matéria seca) foram incluídos em silagens de capim elefante. Adotou-se um delineamento inteiramente casualizado, com 5 tratamentos e 3 repetições, totalizando 15 silos experimentais, os quais foram abertos após 30 dias de ensilagem. Foram analisados o perfil fermentativo, a composição química e a estabilidade aeróbica. Foi realizada uma análise descritiva dos picos de temperatura e pH durante a estabilidade aeróbia. O aumento da inclusão da leucena na composição das silagens reduziu as perdas por gases, perdas por efluentes, fibra em detergente neutro, fibra em detergente ácido, celulose, lignina, carboidratos totais, carboidratos fibrosos e nutrientes digestíveis totais e aumentou os de teores de matéria seca, extrato etéreo e proteína bruta. Foi observado efeito quadrático dos tratamentos sobre a temperatura para atingir o pH máximo (P=0.009). A estabilidade aeróbia permaneceu constante a partir de 40% de inclusão de leucena na composição das silagens de capim elefante. A inclusão da leucena em até 80% na composição de silagens de capim elefante reduz as perdas fermentativas, promove incremento nutricional e aumento da estabilidade aeróbia das silagens.(AU)

Performance and milk quality of cows fed triticale silage or intercropped with oats or legumes

The use of intercropped grass legumes provides a source of sustainable animal production as these vegetables contribute to an increase in forage yield by area, and substitute inorganic nitrogen and other components. The objective of this study was to evaluate the nutritional characteristics of silages and the yield and milk quality of Holstein cows fed triticale silages in monoculture or intercropped with either oats or legumes. The crops for silage production were triticale (TS), triticale in consortium with forage pea (TSP), and triticale in consortium with oats, forage peas and vetches (TSOPV). The silages showed no differences in dry matter content. The highest crude protein (13.06 %) and ethereal extract content was observed in TSOPV, but in the case of the latter, there was little difference when compared with TS (2.35 and 2.16 %, respectively) although the ash contents of the TSOPV and TSP silages did present a difference compared to TS silage. The neutral and acid detergent fibers (NDF and ADF) and cellulose fractions of TS silage were higher (68.60, 41.46 and 38.19 %, respectively) than those in TSOPV and TSP silages, which also had higher levels of soluble nitrogen, ethanol and acetic acid. Dry matter intake was higher in both TSOPV and TSP, which also provided a higher milk yield (21.19 and 20.45 L cow d−1) compared to that of TS silage (18.74 L cow d−1). Cows fed TS also produced milk with a lower N-ureic content (15.15 mg dL−1). The inclusion of legumes with triticale provided good fermentative quality for silage and increased milk production of cows without altering their concentrations of fat and protein.

Performance and milk quality of cows fed triticale silage or intercropped with oats or legumes

The use of intercropped grass legumes provides a source of sustainable animal production as these vegetables contribute to an increase in forage yield by area, and substitute inorganic nitrogen and other components. The objective of this study was to evaluate the nutritional characteristics of silages and the yield and milk quality of Holstein cows fed triticale silages in monoculture or intercropped with either oats or legumes. The crops for silage production were triticale (TS), triticale in consortium with forage pea (TSP), and triticale in consortium with oats, forage peas and vetches (TSOPV). The silages showed no differences in dry matter content. The highest crude protein (13.06 %) and ethereal extract content was observed in TSOPV, but in the case of the latter, there was little difference when compared with TS (2.35 and 2.16 %, respectively) although the ash contents of the TSOPV and TSP silages did present a difference compared to TS silage. The neutral and acid detergent fibers (NDF and ADF) and cellulose fractions of TS silage were higher (68.60, 41.46 and 38.19 %, respectively) than those in TSOPV and TSP silages, which also had higher levels of soluble nitrogen, ethanol and acetic acid. Dry matter intake was higher in both TSOPV and TSP, which also provided a higher milk yield (21.19 and 20.45 L cow d−1) compared to that of TS silage (18.74 L cow d−1). Cows fed TS also produced milk with a lower N-ureic content (15.15 mg dL−1). The inclusion of legumes with triticale provided good fermentative quality for silage and increased milk production of cows without altering their concentrations of fat and protein.(AU)

Introduction of forage legumes into Aruana Guineagrass pasture / Introdução de leguminosas em pastagem de capim-Aruana pastejada por ovinos sob lotação intermitente

The experiment was developed at the Instituto de Zootecnia in Nova Odessa-SP. It was designed to evaluate forage mass, forage legumes ratio in the available forage mass and the transfer potential of the nitrogen fixed by the forage legumes to Aruana Guineagrass pasture grazed by lambs under intermittent grazing. The treatments consisted of the introduction of four accessions of forage legumes in the pasture of Megathyrsus maximum cv. Aruana and a treatment of Aruana Guineagrass pasture (without legumes), totalling five treatments. The Aruana Guineagrass pasture was established five years ago. The forage legumes treatments were: Neonotonia wightii NO 253 (Perennial soy NO 253), Neonotonia wightii NO 2348 (Perennial soy NO 2348), Macrotyloma axillare NO 279 (Macrotyloma legume) and Calopogonium mucunoides NO 1194 (Calapo legume). The experimental design was made up of random blocks with three replicates. The Calapo legume showed the lowest mean forage mass in the three seasons (400 kg/ha). The mean forage mass of the Perennial soy NO 253, Perennial soy NO 2348 and Macrotyloma legume did not show significant differences in the three seasons. Furthermore, the Calapo legume ratio in the pasture was the lowest in the total forage mass (13%) among the intercropped forage legumes (31.9% at 43.2%). Perennial soy NO 253, Perennial soy NO 2348 and Macrotylomalegume showed suitable ratio in the forage mass when intercropped with Aruana Guineagrass. These forage legumes also promoted the highest crude protein content in the Aruana Guineagrass. Thus, it is possible to advise the introduction of Perennial soy NO253, Perennial soy NO2548 or Macrotyloma legume in established Aruana grass pasture.

O experimento foi desenvolvido no Instituto de Zootecnia, em Nova Odessa-SP. Foi projetado para avaliar a massa de forragem, a proporção de leguminosas forrageiras na massa de forragem disponível e o potencial de transferência do nitrogênio fixado pelas leguminosas forrageiras para o pasto de capim Aruana, pastejados por cordeiros sob pastejo intermitente. Os tratamentos consistiram na introdução de quatro acessos de leguminosas forrageiras no pasto de Megathyrsus maximum cv. Aruanã e um tratamento de pasto de capim-aruana (sem leguminosas), totalizando cinco tratamentos. O pasto de capim Aruana foi estabelecido há cinco anos. Os tratamentos com leguminosas forrageiras foram: Neonotonia wightii NO 253 (Soja perene NO 253), Neonotonia wightii NO 2348 (Soja perene NO 2348), Macrotyloma axillare NO 279 (Macrotyloma legume) e Calopogonium mucunoides NO 1194 (Calopogônio). O delineamento experimental foi o de blocos casualizados com três repetições. A leguminosa Calopogônio apresentou a menor massamédia de forragem nas três estações (400 kg / ha). A massa média de forragem da soja perene NO 253, soja perene NO 2348 e leguminosa Macrotyloma não apresentou diferenças significativas nas três estações do ano (Tabela 1). Além disso, a proporção de Calopogônio no pasto foi a mais baixa na massa total de forragem (13%) entre as leguminosas forrageiras consorciadas (31,9% a43,2%). A soja perene NO 253, a soja perene NO 2348 e a leguminosa Macrotyloma apresentaram relação adequada na massa de forragem quando consorciadas com capim Aruana. Essas leguminosas forrageiras também promoveram o maior teor de proteína bruta no capim Aruana. Assim, é possível recomendar a introdução da soja perene NO253, soja perene NO2548 ou leguminosa Macrotyloma em pastagens estabelecidas de capim Aruana.

Introduction of forage legumes into Aruana Guineagrass pasture / Introdução de leguminosas em pastagem de capim-Aruana pastejada por ovinos sob lotação intermitente

The experiment was developed at the Instituto de Zootecnia in Nova Odessa-SP. It was designed to evaluate forage mass, forage legumes ratio in the available forage mass and the transfer potential of the nitrogen fixed by the forage legumes to Aruana Guineagrass pasture grazed by lambs under intermittent grazing. The treatments consisted of the introduction of four accessions of forage legumes in the pasture of Megathyrsus maximum cv. Aruana and a treatment of Aruana Guineagrass pasture (without legumes), totalling five treatments. The Aruana Guineagrass pasture was established five years ago. The forage legumes treatments were: Neonotonia wightii NO 253 (Perennial soy NO 253), Neonotonia wightii NO 2348 (Perennial soy NO 2348), Macrotyloma axillare NO 279 (Macrotyloma legume) and Calopogonium mucunoides NO 1194 (Calapo legume). The experimental design was made up of random blocks with three replicates. The Calapo legume showed the lowest mean forage mass in the three seasons (400 kg/ha). The mean forage mass of the Perennial soy NO 253, Perennial soy NO 2348 and Macrotyloma legume did not show significant differences in the three seasons. Furthermore, the Calapo legume ratio in the pasture was the lowest in the total forage mass (13%) among the intercropped forage legumes (31.9% at 43.2%). Perennial soy NO 253, Perennial soy NO 2348 and Macrotylomalegume showed suitable ratio in the forage mass when intercropped with Aruana Guineagrass. These forage legumes also promoted the highest crude protein content in the Aruana Guineagrass. Thus, it is possible to advise the introduction of Perennial soy NO253, Perennial soy NO2548 or Macrotyloma legume in established Aruana grass pasture.(AU)

O experimento foi desenvolvido no Instituto de Zootecnia, em Nova Odessa-SP. Foi projetado para avaliar a massa de forragem, a proporção de leguminosas forrageiras na massa de forragem disponível e o potencial de transferência do nitrogênio fixado pelas leguminosas forrageiras para o pasto de capim Aruana, pastejados por cordeiros sob pastejo intermitente. Os tratamentos consistiram na introdução de quatro acessos de leguminosas forrageiras no pasto de Megathyrsus maximum cv. Aruanã e um tratamento de pasto de capim-aruana (sem leguminosas), totalizando cinco tratamentos. O pasto de capim Aruana foi estabelecido há cinco anos. Os tratamentos com leguminosas forrageiras foram: Neonotonia wightii NO 253 (Soja perene NO 253), Neonotonia wightii NO 2348 (Soja perene NO 2348), Macrotyloma axillare NO 279 (Macrotyloma legume) e Calopogonium mucunoides NO 1194 (Calopogônio). O delineamento experimental foi o de blocos casualizados com três repetições. A leguminosa Calopogônio apresentou a menor massamédia de forragem nas três estações (400 kg / ha). A massa média de forragem da soja perene NO 253, soja perene NO 2348 e leguminosa Macrotyloma não apresentou diferenças significativas nas três estações do ano (Tabela 1). Além disso, a proporção de Calopogônio no pasto foi a mais baixa na massa total de forragem (13%) entre as leguminosas forrageiras consorciadas (31,9% a43,2%). A soja perene NO 253, a soja perene NO 2348 e a leguminosa Macrotyloma apresentaram relação adequada na massa de forragem quando consorciadas com capim Aruana. Essas leguminosas forrageiras também promoveram o maior teor de proteína bruta no capim Aruana. Assim, é possível recomendar a introdução da soja perene NO253, soja perene NO2548 ou leguminosa Macrotyloma em pastagens estabelecidas de capim Aruana.(AU)

Potential and restrictions of Poincianella pyramidalis (Tul.) L. P. Queiroz as native forage in the Brazilian semi-arid region

Poincianella pyramidalis (catingueira) is a endemic plant of the Caatinga, selected by animals grazing on native pasture. With the aim of evaluating characteristics indicative of its nutritional quality, 10 plants were selected and identified, sampled at five different ages, were used to determine dry matter (DM), crude protein (CP), neutral detergent fibre (NDF), mineral matter (MM), DM degradability (Deg DM), NDF degradability (Deg NDF) and in situ and in vitro leaf-tissue degradability. Phytochemical prospection was performed, and 1H and 13C nuclear magnetic resonance applied to detect the presence of secondary compounds. The data were submitted to analysis of variance and Tukeys test at 5%, and correlation analysis was carried out on the variables for leaf maturity in days. The levels of CP, NDF and Deg NDF showed a negative correlation with the increases in leaf age. Leaf-tissue degradation was restricted due to a physical barrier developed in the leaf fragments, which can be attributed to plant defence mechanisms. The in situ degradability of the cell wall components decreased with the increase in leaf age. The high levels of tannins and lignin, and the strong presence of flavonoids, should be considered for their anti-nutritional and pharmacological potential.(AU)

Potential and restrictions of Poincianella pyramidalis (Tul.) L. P. Queiroz as native forage in the Brazilian semi-arid region

Poincianella pyramidalis (catingueira) is a endemic plant of the Caatinga, selected by animals grazing on native pasture. With the aim of evaluating characteristics indicative of its nutritional quality, 10 plants were selected and identified, sampled at five different ages, were used to determine dry matter (DM), crude protein (CP), neutral detergent fibre (NDF), mineral matter (MM), DM degradability (Deg DM), NDF degradability (Deg NDF) and in situ and in vitro leaf-tissue degradability. Phytochemical prospection was performed, and 1H and 13C nuclear magnetic resonance applied to detect the presence of secondary compounds. The data were submitted to analysis of variance and Tukey’s test at 5%, and correlation analysis was carried out on the variables for leaf maturity in days. The levels of CP, NDF and Deg NDF showed a negative correlation with the increases in leaf age. Leaf-tissue degradation was restricted due to a physical barrier developed in the leaf fragments, which can be attributed to plant defence mechanisms. The in situ degradability of the cell wall components decreased with the increase in leaf age. The high levels of tannins and lignin, and the strong presence of flavonoids, should be considered for their anti-nutritional and pharmacological potential.

Sistema de integração lavoura-pecuária-floresta (ILPF) / Systems integration crop-livestock-forest (ICLF)

O sistema de Integração Lavoura-Pecuária-Floresta (iLPF) consiste em um sistema que visa alta produção de (agricultura, floresta, lavoura/pecuária) através da diversificação, rotação, consorciação e sucessão, sendo essas atividades realizadas na mesma propriedade rural. Atualmente os sistemas de agronegócio têm como principal objetivo maximizar elevada escala de produtos agrícolas, com excelência na qualidade sem afetar os recursos do sistema. Assim a interação de culturas permite a rotação no uso de sistemas, elevando a qualidade do produto, maximizando o padrão de qualidade, sendo ferramenta de grande importância, no que diz respeito à conservação natural, principalmente em áreas degradadas. O objetivo da presente revisão foi relatar a forma de atuação do sistema integração lavoura-pecuáriafloresta (iLPF), abordando os tipos de integração, os pontos positivos a níveis econômico e ambiental. Tendo em vista a melhor utilização do solo, consorciando as melhores culturas com plantas forrageiras mais adaptadas em determinada região.

The Crop-Livestock-Forestry Integration System (iLPF) consists of a system that aims at high production of (agriculture, forest, farming/livestock) through diversification, rotation, intercropping and succession, these activities being carried out on the same rural property. Currently the agribusiness systems have as their main objective to maximize high scale agricultural products, with excellence in quality without affecting system resources. Thus, the interaction of crops allows the rotation in the use of systems, increasing the quality of the product, maximizing the quality standard, being a tool of great importance regarding natural conservation, especially in degraded areas. The objective of this review was to report the performance of the crop-livestock-forestry integration system, considering the integration types, the positive points at the economic and environmental levels. In order to make the best use of the soil, it is better to combine the best crops with the most adapted forage plants in that region.

Sistema de integração lavoura-pecuária-floresta (ILPF) / Systems integration crop-livestock-forest (ICLF)

O sistema de Integração Lavoura-Pecuária-Floresta (iLPF) consiste em um sistema que visa alta produção de (agricultura, floresta, lavoura/pecuária) através da diversificação, rotação, consorciação e sucessão, sendo essas atividades realizadas na mesma propriedade rural. Atualmente os sistemas de agronegócio têm como principal objetivo maximizar elevada escala de produtos agrícolas, com excelência na qualidade sem afetar os recursos do sistema. Assim a interação de culturas permite a rotação no uso de sistemas, elevando a qualidade do produto, maximizando o padrão de qualidade, sendo ferramenta de grande importância, no que diz respeito à conservação natural, principalmente em áreas degradadas. O objetivo da presente revisão foi relatar a forma de atuação do sistema integração lavoura-pecuáriafloresta (iLPF), abordando os tipos de integração, os pontos positivos a níveis econômico e ambiental. Tendo em vista a melhor utilização do solo, consorciando as melhores culturas com plantas forrageiras mais adaptadas em determinada região.(AU)

The Crop-Livestock-Forestry Integration System (iLPF) consists of a system that aims at high production of (agriculture, forest, farming/livestock) through diversification, rotation, intercropping and succession, these activities being carried out on the same rural property. Currently the agribusiness systems have as their main objective to maximize high scale agricultural products, with excellence in quality without affecting system resources. Thus, the interaction of crops allows the rotation in the use of systems, increasing the quality of the product, maximizing the quality standard, being a tool of great importance regarding natural conservation, especially in degraded areas. The objective of this review was to report the performance of the crop-livestock-forestry integration system, considering the integration types, the positive points at the economic and environmental levels. In order to make the best use of the soil, it is better to combine the best crops with the most adapted forage plants in that region.(AU)

Evaluation of mathematical models to describe gas production kinetics of some tropical and temperate forages

Our objective was to identify the best fit mathematical models for in vitro gas production kinetics using rumen fluid and forage plants commonly used in ruminant feed to obtain better estimates of parameters that describe the rumen fermentation. Four mathematical models were tested, two unicompartmental (M1 = first order, M2 = Gompertz) and two bicompartmental (M3 = M1 + M2; M4 = M2 + M2). Two temperate grasses were evaluated, as well as four tropical grasses and three temperate forage legumes. The fit of the models was verified by the corrected Akaike information criterion (AICcr) and the difference among AICcr values (Δr), likelihood probability (Wr), and relative likelihood (ERr). Temperate forages reached maximum gas production between 48 and 72 h. In the tropical forages, it occurred only after 72 h. In profiles in which M3 was the best choice, the values of parameters Vf 1 were higher than those of Vf 2, and k1 values were higher than k2 values. The only exception was for Tifton 85 profile, whose Vf 2 value was higher than Vf 1. The model M3 has a better fit for tropical forages with higher fiber content and lower levels of nonfibrous carbohydrates and crude protein. The model M1 has a better fit for forage with higher nonfibrous carbohydrate contents and low lignin content.(AU)

Diagnostic fingerprints ISSR/SSR for tropical leguminous species Stylosanthes capitata and Stylosanthes macrocephala

Stylosanthes capitata Vogel and Stylosanthes macrocephala M.B.Ferreira & Sousa Costa are two forage leguminous species of agronomic importance for animal husbandry in tropical environments. The physical mixture of both species (80 % S. capitata and 20 % S. macrocephala) comprises the commercial cultivar Estilosantes Campo Grande. However, proximity of fields for seed production may contaminate seed lots, compromising seeds quality. The combined use of dominant and co-dominant molecular markers is an appropriate strategy to certificate genetic purity and perform diversity studies of cultivars. In this research, a set of ISSR (Inter-Simple Sequence Repeat polymorphic DNA) and SSR (Simple Sequence Repeat polymorphic DNA) molecular markers were standardized to characterize S. capitata and S. macrocephala species and evaluate the genetic purity of commercial samples. Four ISSR markers (UBC 2, 864, 885, 886) and SSR marker SC18-01 G4B showed precise species-specific electrophoretic fingerprints for both species. Electrophoretic patterns of ISSR molecular markers should be displayed first to confirm the sample identification. The structure analysis showed that the less contaminated sample was S. capitata with 97 % of its genetic composition assigned to a single genetic cluster vs. 95 % for S. macrocephala. S. capitata has greater genetic diversity (ISSRHe:0.292; SSRHe:0.57) than S. macrocephala (ISSRHe:0.285; SSRHe:0.16); however, this difference was only significant with SSR molecular markers. As these genetic resources have considerable ecological, agronomic and economic importance, tools for accurate species identification and genetic studies are essential for further seed multiplication, as well as for improvement and conservation of cultivars.

Diagnostic fingerprints ISSR/SSR for tropical leguminous species Stylosanthes capitata and Stylosanthes macrocephala

Stylosanthes capitata Vogel and Stylosanthes macrocephala M.B.Ferreira & Sousa Costa are two forage leguminous species of agronomic importance for animal husbandry in tropical environments. The physical mixture of both species (80 % S. capitata and 20 % S. macrocephala) comprises the commercial cultivar Estilosantes Campo Grande. However, proximity of fields for seed production may contaminate seed lots, compromising seeds quality. The combined use of dominant and co-dominant molecular markers is an appropriate strategy to certificate genetic purity and perform diversity studies of cultivars. In this research, a set of ISSR (Inter-Simple Sequence Repeat polymorphic DNA) and SSR (Simple Sequence Repeat polymorphic DNA) molecular markers were standardized to characterize S. capitata and S. macrocephala species and evaluate the genetic purity of commercial samples. Four ISSR markers (UBC 2, 864, 885, 886) and SSR marker SC18-01 G4B showed precise species-specific electrophoretic fingerprints for both species. Electrophoretic patterns of ISSR molecular markers should be displayed first to confirm the sample identification. The structure analysis showed that the less contaminated sample was S. capitata with 97 % of its genetic composition assigned to a single genetic cluster vs. 95 % for S. macrocephala. S. capitata has greater genetic diversity (ISSRHe:0.292; SSRHe:0.57) than S. macrocephala (ISSRHe:0.285; SSRHe:0.16); however, this difference was only significant with SSR molecular markers. As these genetic resources have considerable ecological, agronomic and economic importance, tools for accurate species identification and genetic studies are essential for further seed multiplication, as well as for improvement and conservation of cultivars.(AU)

Consorciações alternativas para a cultivar TBIO Lenox (Triticum aestivum L) exclusivo para pastejo / Alternative mixed cultivar TBIO Lenox (Triticum aestivum L) exclusive for grazing / Consorcios alternativos para variedad TBIO Lenox (Triticum aestivum L) exclusivo para el pasto

Com o intuito de ofertar forragem de forma precoce e por um maior período de tempo, recentemente foi lançada no mercado uma cultivar de trigo direcionada exclusivamente para pastejo. Dado o exposto, o presente estudo teve como objetivo avaliar as características agronômicas da cultivar TBIO Lenox (Triticum aestivum L) exclusiva para pastejo em cultivo extreme ou consorciado com outros sistemas forrageiros. O delineamento experimental utilizado foi o de blocos ao acaso com seis tratamentos e quatro repetições. Os tratamentos foram constituídos por sistemas forrageiros: trigo (Triticum aestivum L) cv. TBIO Lenox, aveia preta (Avena strigosa L) cv. BRS 139 Neblina e ervilhaca (Vicia sativa L.) cv. Comum em cultivo extreme ou consorciadas. Os dados foram submetidos a análise de variância, teste de Tukey à 5% de probabilidade de erro e análise de agrupamento entre os sistemas forrageiros. Com base nos resultados obtidos, foi possível identificar que a cultivar de trigo exclusiva para pastejo apresenta-se como uma boa alternativa forrageira com acréscimos na produção de forragem quando consorciada a leguminosa ou gramínea, sendo indicada em práticas de consorciações economicamente viáveis. Sistemas forrageiros consorciados possibilitaram maior disponibilidade de N, destacando a consorciação de trigo com ervilhaca, indicada como estratégia na mitigação da utilização de adubação nitrogenada.

In order to offer fodder at an early stage and for a longer period of time, a wheat cultivar directed exclusively for grazing was recently launched on the market. Given the above, the present study aimed to evaluate the agronomic characteristics of the cultivar TBIO Lenox (Triticum aestivum L) exclusive for grazing in extreme cultivation or associated with other forage systems. The experimental design used was a randomized block with six treatments and four replications. The treatments consisted of forage systems: wheat (Triticum aestivum L) cv. TBIO Lenox, black oats (Avena strigose L) cv. BRS 139 Fog and vetch (Vicia sativa L) cv. Common in extreme cultivation or intercropping. The data were submitted to analysis of variance, Tukey test at 5% probability of error and cluster analysis between forage systems. Based on the results obtained, it was possible to identify that the wheat cultivar exclusive for grazing presents itself as a good forage alternative with added forage production when intercropped with legumes or grasses, being indicated in economically viable intercropping practices. Consortium forage systems allowed greater availability of N to forage systems, highlighting the intercropping of wheat with vetch, indicated as a strategy to mitigate the use of nitrogen fertilization.

Con el fin de ofrecer forraje en una etapa temprana y durante un período de tiempo más prolongado, recientemente se lanzó al mercado un cultivar de trigo dirigido exclusivamente al pastoreo. Dado lo anterior, el presente estudio tuvo como objetivo evaluar las características agronómicas del cultivar TBIO Lenox (Triticum aestivum L) exclusivo para el pastoreo en cultivos extremos o asociado con otros sistemas de forraje. El diseño experimental utilizado fue un bloque aleatorizado con seis tratamientos y cuatro repeticiones. Los tratamientos consistieron en sistemas de forraje: trigo (Triticum aestivum L) cv. TBIO Lenox, avena negra (Avena strigosa L) cv. BRS 139 Niebla y arveja (Vicia sativa L) cv. Común en cultivos extremos o cultivos intercalados. Los datos fueron sometidos a análisisde varianza, prueba de Tukey con 5% de probabilidad de error y análisis de conglomerados entre sistemas forrajeros. En base a los resultados obtenidos, fue posible identificar que el cultivar de trigo exclusivo para pastoreo se presenta como una buena alternativa de forraje con producción de forraje adicional cuando se intercala con leguminosas o pastos, lo que se indica en prácticas de cultivo intercaladas económicamente viables. Los sistemas de forraje del consorcio permitieron una mayor disponibilidad de N para los sistemas de forraje, destacando el cultivo intercalado de trigo con veza, indicado como una estrategia para mitigar el uso de fertilización nitrogenada.