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1.
Ciênc. rural (Online) ; 52(10): e20210459, 2022. tab, graf
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-1396724

Resumo

This research evaluated the effect of liming (with and without) and biochar (with and without) on sorghum cv. BRS Ponta Negra growth and Arenosol chemical properties in the Semiarid environment. The experimental design was in randomized blocks, with treatments in a 2x2 factorial scheme, corresponding to the application or not of lime (0 and 2.5 t ha-1) and biochar (0 and 12.5 t ha-1). Biochar was produced from cashew branches. The experiment was conducted in 16 m² plots where the forage sorghum cultivar BRS Ponta Negra was cultivated. The soil chemical characteristics, the production attributes, and the structural characteristics of the sorghum cultivar studied were evaluated. There was no interaction between factors. The use of biochar increased the pH and Ca and P contents in the soil and contributed to increasing the panicle mass (2.51 t ha-1 of DM). Lime application affected the soil Ca content as the dose of 2.5 t ha-1 resulted in higher values of culm diameter (15.25 mm), panicle mass, and culm mass (2.63 and 7.50 t ha-1 of DM, respectively). Therefore, these results allowed to outline strategies for the use of limestone and biochar for forage production in semiarid environments in sandy soils. Because, these materials improve some chemical attributes of the soil and the production of forage sorghum. It is noteworthy that edophoclimatic conditions can change the response patterns observed in this research. Therefore, research in other regions is essential.


Este trabalho teve como objetivo avaliar o efeito da calagem (com e sem) e do biocarvão (com e sem) sobre o crescimento e a produção de forragem do sorgo forrageiro cv. BRS Ponta Negra e nas propriedades químicas do Neossolo Quartzarênico no ambiente Semiárido. O delineamento experimental foi em blocos casualizados, com tratamentos em esquema fatorial 2x2, correspondendo a aplicação ou não do calcário (0 e 2,5 t ha-1) e do biocarvão (0 e 12,5 t ha-1). O biochar era produzido a partir de galhos de caju. O experimento foi conduzido em parcelas de 16 m² onde foi cultivada a cultivar de sorgo forrageiro BRS Ponta Negra. Foram avaliadas as características químicas do solo, os atributos de produção e as características estruturais da cultivar de sorgo estudada. Não houve interação entre os fatores. O uso do biochar aumentou o pH e os teores de Ca e P no solo e contribuiu para o aumento da massa da panícula (2,51 t ha-1 de MS). A aplicação de calcário afetou o teor de Ca no solo, assim a dose de 2,5 t ha-1 resultou em maiores valores de diâmetro do colmo (15,25 mm), massa da panícula e massa do colmo (2,63 e 7,50 t ha-1 de MS, respectivamente). Portanto, esses resultados permitem traçar estrategias de uso do calcário e biochar para produção forrageira em ambientes semiáridos com solos arenosos. Pois, esses materias melhoram alguns atributos quimicos do solo e a produção do sorgo forrageiro. Vale ressaltar que as condições edofoclimáticas podem alterar os padrões de resposta observados nesta pesquisa. Portanto, a pesquisa em outras regiões é essencial.


Assuntos
Química do Solo , Solos Calcários , Condições do Solo , Sorghum , Brasil , 24444 , Características do Solo
2.
Acta Sci. Anim. Sci. ; 43: e52842, ago. 2021. graf, tab
Artigo em Inglês | VETINDEX | ID: vti-32355

Resumo

The objective of this study was to evaluate the production and chemical composition of three forage species at different regrowth intervals. A 3 x 4 randomized-block factorial design with three forage species (Andropogon, Buffel, and Massai) and four regrowth intervals (21, 35, 49, and 63 days) was used. There was no interaction (p > 0.05) between forage species and regrowth interval on any of the chemical components evaluated. The crude protein content decreased but the contents of neutral detergent fiber, acid detergent fiber and hemicellulose increased with increasing regrowth interval (p > 0.05). Only the contents of crude protein and ether extract were similar (p > 0.05) among grasses. A significant interaction was observed (p < 0.05) between forage species and regrowth interval on forage mass. Andropogon grass had the highest forage mass at 63 days (3,270.1 kg ha-1 DM cut-1) and the highest productivity regardless of the regrowth interval (19.1 t ha-1 DM year-1). Therefore, Andropogon grass was the most productive forage among the tested species. Pastures should be managed with shorter growth intervals due to the highest crude protein level and the lowest contents of neutral detergent fiber and acid detergent fiber.(AU)


Assuntos
Poaceae/classificação , Andropogon , Pastagens
3.
Acta sci., Anim. sci ; 43: e52842, 2021. graf, tab
Artigo em Inglês | VETINDEX | ID: biblio-1459946

Resumo

The objective of this study was to evaluate the production and chemical composition of three forage species at different regrowth intervals. A 3 x 4 randomized-block factorial design with three forage species (Andropogon, Buffel, and Massai) and four regrowth intervals (21, 35, 49, and 63 days) was used. There was no interaction (p > 0.05) between forage species and regrowth interval on any of the chemical components evaluated. The crude protein content decreased but the contents of neutral detergent fiber, acid detergent fiber and hemicellulose increased with increasing regrowth interval (p > 0.05). Only the contents of crude protein and ether extract were similar (p > 0.05) among grasses. A significant interaction was observed (p < 0.05) between forage species and regrowth interval on forage mass. Andropogon grass had the highest forage mass at 63 days (3,270.1 kg ha-1 DM cut-1) and the highest productivity regardless of the regrowth interval (19.1 t ha-1 DM year-1). Therefore, Andropogon grass was the most productive forage among the tested species. Pastures should be managed with shorter growth intervals due to the highest crude protein level and the lowest contents of neutral detergent fiber and acid detergent fiber.


Assuntos
Andropogon , Pastagens , Poaceae/classificação
4.
Ci. Rural ; 48(1)2018.
Artigo em Inglês | VETINDEX | ID: vti-734853

Resumo

Corporations started to invest in human capital to employ professionals that presented a holistic view of the commercial area and that were able to utilize the available resources in each demanded situation consciously. Moreover, professionals should also be emotionally centered regarding emotional intelligence (EI) and should have personal and vocational skills. In addition, the labor market demands zootechnicians to be competent at having satisfactory work performance together with the EI abilities. The EI contributes to the presence of a precise particularity in the zootechnician, which will act in different contexts, including the organizational area to promote the training, management of human capital and the physical resources of the agroindustrial organizations.(AU)


As corporações começaram a investir no capital humano, buscando profissionais que possuíssem uma visão holística no âmbito comercial, e que fossem capazes de utilizar de forma consciente os recursos disponíveis em cada situação. Estes sendo centrados emocionalmente, no que tange a inteligência emocional (IE), e que possuam habilidades e competências de caráter pessoal e profissional. Adicionalmente, o mercado de trabalho visa zootecnistas que possuam competências para o desempenho satisfatório no trabalho, ressaltando a necessidade de outras habilidades e competências, incluindo a IE. De modo suplementar, a IE contribui para que esse diferencial seja nítido no zootecnista, em que atuará em todas as esferas, incluindo o âmbito organizacional promovendo o treinamento, a gestão do capital humano e dos recursos físicos das organizações agroindustriais.(AU)


Assuntos
Humanos , Inteligência Emocional , Competência Profissional , Criação de Animais Domésticos , Agroindústria
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