Effect of In Ovo Ascorbic Acid Injection and Thermal Manipulation During Incubation on Intestine Morphology of Broilers Reared under Cold and Heat Stress

It was investigated if pre-incubation ascorbic acid (AA) injection in fertile eggs incubated at high temperature impacts the performance, the yield of carcass and parts, and the intestine morphology of broilers reared under heat stress. Three thousand Cobb® fertile broiler eggs were randomly distributed according to weight into three incubations treatments (eggs not injected with AA and incubated at 37.5°C; eggs not injected with AA and incubated at 39°C; and eggs injected with 6 µg AA/100 µL water prior to incubation and incubated at 39ºC). The hatched birds were reared at thermoneutral, cold, and hot house temperatures. Broilers reared under hot temperature presented lower feed intake and weight gain than the broilers of the different rearing temperatures. Egg incubation at 39.0 ºC and 39.0 ºC + AA reduced broiler viability. Carcass and cut yields were not influenced by incubation and rearing procedures. Duodenal goblet cell count was lower in broilers from eggs of the treatment 39ºC + AA than in broilers from the other incubation treatments and in broiler rearing in hot temperature. In the jejunum, the goblet cell counts were higher in broilers that were reared under hot than thermoneutral temperatures. The incubation treatment of 39 ºC+AA increased the goblet cell counts in the ileum of broilers reared under cold temperatures. Rearing temperature influenced the duodenal villi counts, which were lower under cold rearing conditions than in the two other rearing temperatures. The results showed that egg incubation at 39°C, independently of ascorbic acid injection, did not produce an effective epigenetic heat adaptation in broilers.(AU)

Evolução da produção e exportação de frangos de corte no estado do Mato Grosso do Sul / Brazilian State of Mato Grosso do Sul broilers production and exports evolution

O objetivo do trabalho foi realizar um panorama evolutivo da cadeia de produção e exportação de frangos de corte no estado do Mato Grosso do Sul considerando o período de 2007 à 2016. Posteriormente se fez uma comparação dos resultados com os encontrados no estado do Paraná e um levantamento das barreiras comercias impostas à importação da carne de frango do Mato Grosso do Sul. A pesquisa se trata de uma análise descritiva e foram utilizados dados do InfoAgro, Secretária do Estado de Meio Ambiente, Desenvolvimento Econômico, Produção e Agricultura Familiar, Estatística de Comércio Exterior do Agronegócio Brasileiro e Associação Brasileira de Proteína Animal. Os resultados apontam que o setor encontra-se em evolução dentro do Mato Grosso do Sul, com crescimentos significativos na produção e exportação. O Paraná possui um crescimento superior ao do Mato Grosso do Sul no período avaliado, o que evidencia o potencial de crescimento do estado. Verificou-se que as barreiras à importação da carne de frango comerciais impostas ao Mato Grosso do Sul não influem significantemente no crescimento da cadeia avícola no estado, e que atualmente o mesmo atende a todas as exigências. Conclui-se que o estado do Mato Grosso do Sul necessita de tempo para que ocorra a consolidação da avicultura, e que para tanto se faz necessário incentivo do governo para atração de novas empresas e fortalecimento da atividade junto aos produtores do estado.

The aim of this work was to bring out an evolutionary panorama of the broilers production and export in the Mato Grosso do Sul state, considering the period between 2007 and 2016. Subsequently a survey was made for the commercial barriers imposed on the importation of Mato Grosso do Sul broiler meat. The research is a descriptive analysis and data from InfoAgro, Famasul System and Agrostat and the Brazilian Association of Animal Proteins. The results indicate that the sector is in evolution within the Mato Grosso do Sul, with significant increases in production and exports. Paraná has a higher growth than Mato Grosso do Sul in this evaluated period, which shows the growth potential of the state. It has also been found that the barriers to the importation of commercial broiler meat, imposed on the MS do not influence significantly the growth of the poultry production chain in the state, that currently meets with all requirements imposed. It is concluded that the State of Mato Grosso do Sul needs time for the poultry industry consolidation, and that therefore, is necessary the encouragement and attraction of new companies to strengthen the activity of broilers production in Mato Grosso do Sul.

Evolução da produção e exportação de frangos de corte no estado do Mato Grosso do Sul / Brazilian State of Mato Grosso do Sul broilers production and exports evolution

O objetivo do trabalho foi realizar um panorama evolutivo da cadeia de produção e exportação de frangos de corte no estado do Mato Grosso do Sul considerando o período de 2007 à 2016. Posteriormente se fez uma comparação dos resultados com os encontrados no estado do Paraná e um levantamento das barreiras comercias impostas à importação da carne de frango do Mato Grosso do Sul. A pesquisa se trata de uma análise descritiva e foram utilizados dados do InfoAgro, Secretária do Estado de Meio Ambiente, Desenvolvimento Econômico, Produção e Agricultura Familiar, Estatística de Comércio Exterior do Agronegócio Brasileiro e Associação Brasileira de Proteína Animal. Os resultados apontam que o setor encontra-se em evolução dentro do Mato Grosso do Sul, com crescimentos significativos na produção e exportação. O Paraná possui um crescimento superior ao do Mato Grosso do Sul no período avaliado, o que evidencia o potencial de crescimento do estado. Verificou-se que as barreiras à importação da carne de frango comerciais impostas ao Mato Grosso do Sul não influem significantemente no crescimento da cadeia avícola no estado, e que atualmente o mesmo atende a todas as exigências. Conclui-se que o estado do Mato Grosso do Sul necessita de tempo para que ocorra a consolidação da avicultura, e que para tanto se faz necessário incentivo do governo para atração de novas empresas e fortalecimento da atividade junto aos produtores do estado.(AU)

The aim of this work was to bring out an evolutionary panorama of the broilers production and export in the Mato Grosso do Sul state, considering the period between 2007 and 2016. Subsequently a survey was made for the commercial barriers imposed on the importation of Mato Grosso do Sul broiler meat. The research is a descriptive analysis and data from InfoAgro, Famasul System and Agrostat and the Brazilian Association of Animal Proteins. The results indicate that the sector is in evolution within the Mato Grosso do Sul, with significant increases in production and exports. Paraná has a higher growth than Mato Grosso do Sul in this evaluated period, which shows the growth potential of the state. It has also been found that the barriers to the importation of commercial broiler meat, imposed on the MS do not influence significantly the growth of the poultry production chain in the state, that currently meets with all requirements imposed. It is concluded that the State of Mato Grosso do Sul needs time for the poultry industry consolidation, and that therefore, is necessary the encouragement and attraction of new companies to strengthen the activity of broilers production in Mato Grosso do Sul.(AU)

Coturnicultura como alternativa para aumento de renda do pequeno produtor / Quail production as an alternative to improve income to small farmers

A coturnicultura tem apresentado desenvolvimento significativo nos últimos anos devido às tecnologias empregadas na cadeia produtiva, gerando resultados satisfatórios aos produtores, com baixo custo de investimento. O estudo teve como objetivo avaliar a viabilidade econômico-financeira da coturnicultura para o pequeno produtor rural ou agricultor familiar. Foram utilizados dois grupos com 1.500 aves cada, A1 (aquisição de lote misto com um dia de idade) e A2 (aquisição de fêmeas com 35 dias de idade), e empregados a taxa interna de retorno, o payback simples e o descontado, bem como o valor presente líquido para a análise econômico-financeira. A coturnicultura representa uma alternativa em potencial para agregação de renda ao pequeno produtor/agricultor familiar, pois o retorno do investimento ocorre no segundo ano. Para o início da produção coturnícula, a aquisição de fêmeas aos 35 dias de idade é mais rentável, quando comparada à aquisição de lote misto com um dia de idade. Dessa forma, a alternativa estratégica de comercialização para o início da atividade é o ovo in natura, que possibilita o retorno do investimento em curto prazo.(AU)

Quail production showed significant development in recent years due to technologies used in the production chain, generating satisfactory results for farmers with low cost of investment. The purpose of this study was to evaluate the economic feasibility of quail production implementation for small farmers. A total of 3,000 birds were used and divided in two groups (A1 and A2). The internal rate return was measured, as well as simple payback. The present liquid value for economic and financial analysis was discounted. Quail production is a potential alternative for income increase of small farmers, since the return on investment occurs in the second year. To start quail production, the acquisition of female quails at 35 days of age is more profitable compared to a one day old mixed batch. Thus, the alternative marketing strategy for the beginning of activity is the egg, due to the return on short-term investment.(AU)

Coturnicultura como alternativa para aumento de renda do pequeno produtor / Quail production as an alternative to improve income to small farmers

A coturnicultura tem apresentado desenvolvimento significativo nos últimos anos devido às tecnologias empregadas na cadeia produtiva, gerando resultados satisfatórios aos produtores, com baixo custo de investimento. O estudo teve como objetivo avaliar a viabilidade econômico-financeira da coturnicultura para o pequeno produtor rural ou agricultor familiar. Foram utilizados dois grupos com 1.500 aves cada, A1 (aquisição de lote misto com um dia de idade) e A2 (aquisição de fêmeas com 35 dias de idade), e empregados a taxa interna de retorno, o payback simples e o descontado, bem como o valor presente líquido para a análise econômico-financeira. A coturnicultura representa uma alternativa em potencial para agregação de renda ao pequeno produtor/agricultor familiar, pois o retorno do investimento ocorre no segundo ano. Para o início da produção coturnícula, a aquisição de fêmeas aos 35 dias de idade é mais rentável, quando comparada à aquisição de lote misto com um dia de idade. Dessa forma, a alternativa estratégica de comercialização para o início da atividade é o ovo in natura, que possibilita o retorno do investimento em curto prazo.(AU)

Quail production showed significant development in recent years due to technologies used in the production chain, generating satisfactory results for farmers with low cost of investment. The purpose of this study was to evaluate the economic feasibility of quail production implementation for small farmers. A total of 3,000 birds were used and divided in two groups (A1 and A2). The internal rate return was measured, as well as simple payback. The present liquid value for economic and financial analysis was discounted. Quail production is a potential alternative for income increase of small farmers, since the return on investment occurs in the second year. To start quail production, the acquisition of female quails at 35 days of age is more profitable compared to a one day old mixed batch. Thus, the alternative marketing strategy for the beginning of activity is the egg, due to the return on short-term investment.(AU)

Grape (Vitis vinifera) pomace flour as pigment agent of quail eggs

The aim of the study was to evaluate the effect of dietary grape pomace flour (GPF) inclusion on the performance and egg quality of European quails (Coturnix coturnix coturnix) in lay. One hundred ninety-two (192), 42-day-old quails were distributed in a completely randomized design with four treatments (0, 2, 4 and 6% grape pomace flour inclusion) with six replicates of eight birds each. The performance parameters egg weight (g), average feed intake (g/bird), total feed intake (g/bird), egg production (%) and feed conversion ratio (kg/dozen) were evaluated, as well as egg quality traits Haugh unit, albumen weight (g), yolk weight (g), eggshell thickness (mm), egg specific gravity (g/cm3), and yolk pigmentation. There was no effect (p>0.05) of dietary GPF levels on egg production, feed intake, or feed conversion ratio. Egg weight, albumen weight, and egg specific gravity linearly decreased (p<0.05) as GPM levels increased in the diet. Haugh unit and eggshell thickness were not affected (p>0.05) by the treatments. A quadratic effect (p<0.05) was observed for yolk weight, with an estimated maximal inclusion level of grape pomace flour of 4.18% to obtain the highest yolk weight. A quadratic effect (p<0.05) was also observed on yolk pigmentation, with an estimated minimal level of 3.2% for this parameter. The minimal inclusion of 3.2% of grape pomace flour in quail diets influenced the egg yolk pigmentation, demonstrating its efficiency as a pigmentation additive.(AU)

Grape (Vitis vinifera) pomace flour as pigment agent of quail eggs

The aim of the study was to evaluate the effect of dietary grape pomace flour (GPF) inclusion on the performance and egg quality of European quails (Coturnix coturnix coturnix) in lay. One hundred ninety-two (192), 42-day-old quails were distributed in a completely randomized design with four treatments (0, 2, 4 and 6% grape pomace flour inclusion) with six replicates of eight birds each. The performance parameters egg weight (g), average feed intake (g/bird), total feed intake (g/bird), egg production (%) and feed conversion ratio (kg/dozen) were evaluated, as well as egg quality traits Haugh unit, albumen weight (g), yolk weight (g), eggshell thickness (mm), egg specific gravity (g/cm3), and yolk pigmentation. There was no effect (p>0.05) of dietary GPF levels on egg production, feed intake, or feed conversion ratio. Egg weight, albumen weight, and egg specific gravity linearly decreased (p0.05) by the treatments. A quadratic effect (p<0.05) was observed for yolk weight, with an estimated maximal inclusion level of grape pomace flour of 4.18% to obtain the highest yolk weight. A quadratic effect (p<0.05) was also observed on yolk pigmentation, with an estimated minimal level of 3.2% for this parameter. The minimal inclusion of 3.2% of grape pomace flour in quail diets influenced the egg yolk pigmentation, demonstrating its efficiency as a pigmentation additive.

Effects of the Addition of Glucose, Sodium Bicarbonate, and Vitamin E to the Drinking Water of Pre-Slaughter Broiler Chickens on Carcass Yield, Gastric Emptying and Meat Quality

An experiment was conducted of the poultry facilities of La Salle Agricultural College in Xanxerê, SC, Brazil, to evaluate the effect of the administration of sodium bicarbonate, glucose and vitamin E to the drinking water during pre-slaughter feed withdrawal on carcass yield, organ relative weights (heart, liver, proventriculus, and gizzard), gizzard emptying, and meat quality of broiler chickens. The applied treatments were: water as control; 50g/L of glucose; 50g/L de glucose + 200mg/L of vitamin E; 75g/L of glucose; 75g/L + 200mg/L of vitamin E; 0.45% of sodium bicarbonate; 0.45% of sodium bicarbonate + 200mg/L of vitamin E; 0.55% of sodium bicarbonate; 0.55% of sodium bicarbonate + 200mg/L of vitamin E; 200mg/L de vitamin E. On the last day before slaughter, during the water diet period,500 birds were distributed in a completely randomized experimental design with ten treatments and ten replicates of five birds each. No difference in broiler carcass yield and organ relative weights was found. There were no significant changes in gizzard contents, in ultimate meat, cooking loss, shear force value, or in the meat color parameters L* (lightness), a* (redness) and b* (yellowness). It was concluded is that the addition of glucose, sodium bicarbonate, and vitamin E to the drinking water during pre-slaughter feed withdrawal period has no influence on carcass yield or on relative organ weight, neither on the emptying of the gizzard contents and the meat quality of broiler chickens.

Effects of the Addition of Glucose, Sodium Bicarbonate, and Vitamin E to the Drinking Water of Pre-Slaughter Broiler Chickens on Carcass Yield, Gastric Emptying and Meat Quality

An experiment was conducted of the poultry facilities of La Salle Agricultural College in Xanxerê, SC, Brazil, to evaluate the effect of the administration of sodium bicarbonate, glucose and vitamin E to the drinking water during pre-slaughter feed withdrawal on carcass yield, organ relative weights (heart, liver, proventriculus, and gizzard), gizzard emptying, and meat quality of broiler chickens. The applied treatments were: water as control; 50g/L of glucose; 50g/L de glucose + 200mg/L of vitamin E; 75g/L of glucose; 75g/L + 200mg/L of vitamin E; 0.45% of sodium bicarbonate; 0.45% of sodium bicarbonate + 200mg/L of vitamin E; 0.55% of sodium bicarbonate; 0.55% of sodium bicarbonate + 200mg/L of vitamin E; 200mg/L de vitamin E. On the last day before slaughter, during the water diet period,500 birds were distributed in a completely randomized experimental design with ten treatments and ten replicates of five birds each. No difference in broiler carcass yield and organ relative weights was found. There were no significant changes in gizzard contents, in ultimate meat, cooking loss, shear force value, or in the meat color parameters L* (lightness), a* (redness) and b* (yellowness). It was concluded is that the addition of glucose, sodium bicarbonate, and vitamin E to the drinking water during pre-slaughter feed withdrawal period has no influence on carcass yield or on relative organ weight, neither on the emptying of the gizzard contents and the meat quality of broiler chickens.(AU)

Effect of In-Ovo Ascorbic Acid Injection on the Bone Development of Broiler Chickens Submitted to Heat Stress During Incubation and Rearing

This experiment was conducted to evaluate the effect of in-ovo ascorbic acid (AA) injection on the bone development of broilers submitted to heat stress during incubation and rearing. One thousand (1,000) Cobb(r)fertile broiler eggs were randomly distributed according to the weight into five incubators, with 200 eggs per incubator. The incubation treatments were: eggs not injected with AA and incubated at 37.5°C; eggs not injected with AA and incubated at 39°C; and eggs injected with 6 µg AA/100 µL water prior to incubation and incubated at 39ºC. The hatched birds were reared at three different house temperatures: cold, thermoneutral, or and hot. The high incubation temperature negatively influenced broilers' bone characteristics. The femur of the birds hatched from eggs incubated at 39°C and injected with AA presented lower shaft mineral density, lower maximum force and lower elongation at maximum force. Their tibia presented reduced mineral density at the proximal and distal epiphysis. In-ovo AA injection of eggs incubated at high temperature did not minimize the negative effects of high rearing temperature on the performance andbone development of broiler chickens reared until 42 days of age.

Storage period affects weight loss of japanese quail eggs

Long storage periods may increase embryo mortality. The objective of this study was to evaluate the effects of storage period on the weight loss, eggshell surface temperature, hatchability, and embryonic mortality of Japanese quail eggs. Two hundred fertile eggs were collected from a flock of 30-week-old Japanese quails (Coturnix coturnix japonica). The eggs were collected for 10 consecutive days after lay, and immediately incubated. A completely randomized experimental design with 10 treatments, corresponding to the number of days eggs were stored between egg collection and setting, with 20 replicates each, was applied. Egg weight loss increased with storage period duration, starting on day 6 (2.1%, on average) and reached 3.26%, on average, in eggs stored for 10 days. The highest hatchability (p>0.05) was obtained in eggs stored for two days, which also lost the least weight (1.20%). Storage period did not influence eggshell surface temperature (p>0.05) during incubation, but higher temperatures (p 0.05) were measured on days 10 and 15 of incubation compared with day 5. Eggs stored for ten days presented the highest weight loss, and therefore, a storage period of up to five days is recommended to maintain the quality of incubated Japanese quail eggs. Furthermore, egg surface temperature increases during the second half of the incubation period as a result of increasing embryonic metabolic rate.

Storage period affects weight loss of japanese quail eggs

Long storage periods may increase embryo mortality. The objective of this study was to evaluate the effects of storage period on the weight loss, eggshell surface temperature, hatchability, and embryonic mortality of Japanese quail eggs. Two hundred fertile eggs were collected from a flock of 30-week-old Japanese quails (Coturnix coturnix japonica). The eggs were collected for 10 consecutive days after lay, and immediately incubated. A completely randomized experimental design with 10 treatments, corresponding to the number of days eggs were stored between egg collection and setting, with 20 replicates each, was applied. Egg weight loss increased with storage period duration, starting on day 6 (2.1%, on average) and reached 3.26%, on average, in eggs stored for 10 days. The highest hatchability (p>0.05) was obtained in eggs stored for two days, which also lost the least weight (1.20%). Storage period did not influence eggshell surface temperature (p>0.05) during incubation, but higher temperatures (p 0.05) were measured on days 10 and 15 of incubation compared with day 5. Eggs stored for ten days presented the highest weight loss, and therefore, a storage period of up to five days is recommended to maintain the quality of incubated Japanese quail eggs. Furthermore, egg surface temperature increases during the second half of the incubation period as a result of increasing embryonic metabolic rate.(AU)

Effect of In-Ovo Ascorbic Acid Injection on the Bone Development of Broiler Chickens Submitted to Heat Stress During Incubation and Rearing

This experiment was conducted to evaluate the effect of in-ovo ascorbic acid (AA) injection on the bone development of broilers submitted to heat stress during incubation and rearing. One thousand (1,000) Cobb(r)fertile broiler eggs were randomly distributed according to the weight into five incubators, with 200 eggs per incubator. The incubation treatments were: eggs not injected with AA and incubated at 37.5°C; eggs not injected with AA and incubated at 39°C; and eggs injected with 6 µg AA/100 µL water prior to incubation and incubated at 39ºC. The hatched birds were reared at three different house temperatures: cold, thermoneutral, or and hot. The high incubation temperature negatively influenced broilers' bone characteristics. The femur of the birds hatched from eggs incubated at 39°C and injected with AA presented lower shaft mineral density, lower maximum force and lower elongation at maximum force. Their tibia presented reduced mineral density at the proximal and distal epiphysis. In-ovo AA injection of eggs incubated at high temperature did not minimize the negative effects of high rearing temperature on the performance andbone development of broiler chickens reared until 42 days of age.(AU)

Reduced Nutrient Excretion and Environmental Microbial Load with the Addition of a Combination of Enzymes and Direct-Fed Microbials to the Diet of Broiler Chickens

This study evaluated the effects of the dietary inclusion of an enzyme blend and a direct-fed microbials in broiler diets on litter production and quality. In total, 900 Cobb 500(r) broiler chicks were distributed according to a completely randomized design into 4 treatments and 9 replicates of 25 birds each. Broilers were reared from 1 to 42 days of age. The treatments consisted of the following diets: NC: negative control; DFM: NC + 500 ppm of direct-fed microbials product (DFM), containing Bacillus subtilis and Bacillus licheniformis; ENZ: diet formulated with an enzyme blend (20 ppm phytase, 200 ppm protease and 200 ppm of xylanase); DFM+E: ENZ + DFM. Birds and litter were weighed at the start and end of the rearing period, for litter production and waste ratio (Rw) determination. Litter samples were analyzed for dry matter (DM) content, total and thermotolerant coliform counts, nutrient composition (nitrogen (N), phosphorous (P) and potassium (K)), and fiber fraction (neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin). The dietary inclusion of the evaluated additivesdid not influence litter production or Rw; however, ADF (%), NDF (kg and kg/kg DM litter), and total and thermotolerant coliform counts were reduced, and N content increased in the litter. The diets containing enzymes (ENZ and DFM+E) reduced litter P content. The addition of exogenous enzymes and their combination with a DFM based on Bacillus spp .Did not affect waste production, and reduced litter microbial load, and the contents of P and insoluble fiber in the litter.

Effect of high incubation temperature on the blood parameters of layer chicks

Adequate environmental temperature control is essential for incubation efficiency. Layer breeder eggs (n=360) were weighed and distributed in a completely randomized experimental design with two treatments, consisting of two incubation temperatures (T1=37.5 °C, control; and T2=39.0 °C, hot), with two incubators per temperature, and 90 eggs per incubator, totaling 360 eggs. Hatchability, embryo mortality, and chick cloacal and body surface temperatures were not affected by incubation temperature. Eggs incubated at the hot temperature presented greater egg mass loss and higher eggshell conductance than those incubated at the control temperature. Layer chicks derived from eggs incubated at control temperature showed greater absolute weight, yolk-free egg mass, and heavier hearts than those from eggs submitted to heat stress during incubation. The control group presented lower base excess and ionized calcium blood levels. Incubating eggs at temperatures higher than those recommended compromises body and heart development of layer chicks and negatively affects blood ionized calcium availability, and therefore, bone mineralization during embryo development. Efficient temperature control during the incubation of fertile eggs is essential to obtain good quality layer chicks.

Effect of high incubation temperature on the blood parameters of layer chicks

Adequate environmental temperature control is essential for incubation efficiency. Layer breeder eggs (n=360) were weighed and distributed in a completely randomized experimental design with two treatments, consisting of two incubation temperatures (T1=37.5 °C, control; and T2=39.0 °C, hot), with two incubators per temperature, and 90 eggs per incubator, totaling 360 eggs. Hatchability, embryo mortality, and chick cloacal and body surface temperatures were not affected by incubation temperature. Eggs incubated at the hot temperature presented greater egg mass loss and higher eggshell conductance than those incubated at the control temperature. Layer chicks derived from eggs incubated at control temperature showed greater absolute weight, yolk-free egg mass, and heavier hearts than those from eggs submitted to heat stress during incubation. The control group presented lower base excess and ionized calcium blood levels. Incubating eggs at temperatures higher than those recommended compromises body and heart development of layer chicks and negatively affects blood ionized calcium availability, and therefore, bone mineralization during embryo development. Efficient temperature control during the incubation of fertile eggs is essential to obtain good quality layer chicks.(AU)

Reduced Nutrient Excretion and Environmental Microbial Load with the Addition of a Combination of Enzymes and Direct-Fed Microbials to the Diet of Broiler Chickens

This study evaluated the effects of the dietary inclusion of an enzyme blend and a direct-fed microbials in broiler diets on litter production and quality. In total, 900 Cobb 500(r) broiler chicks were distributed according to a completely randomized design into 4 treatments and 9 replicates of 25 birds each. Broilers were reared from 1 to 42 days of age. The treatments consisted of the following diets: NC: negative control; DFM: NC + 500 ppm of direct-fed microbials product (DFM), containing Bacillus subtilis and Bacillus licheniformis; ENZ: diet formulated with an enzyme blend (20 ppm phytase, 200 ppm protease and 200 ppm of xylanase); DFM+E: ENZ + DFM. Birds and litter were weighed at the start and end of the rearing period, for litter production and waste ratio (Rw) determination. Litter samples were analyzed for dry matter (DM) content, total and thermotolerant coliform counts, nutrient composition (nitrogen (N), phosphorous (P) and potassium (K)), and fiber fraction (neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin). The dietary inclusion of the evaluated additivesdid not influence litter production or Rw; however, ADF (%), NDF (kg and kg/kg DM litter), and total and thermotolerant coliform counts were reduced, and N content increased in the litter. The diets containing enzymes (ENZ and DFM+E) reduced litter P content. The addition of exogenous enzymes and their combination with a DFM based on Bacillus spp .Did not affect waste production, and reduced litter microbial load, and the contents of P and insoluble fiber in the litter.(AU)

Efeito de níveis de silício na água de bebida sobre o desempenho, rendimento de carcaça, excreção de minerais e perfil de ácidos graxos no músculo peitoral de frangos de corte / Effect of levels of silicon in drink water of broiler on performance, carcass yield, excretion of minerals and fatty acid profile

O objetivo do estudo foi avaliar o efeito de níveis de silício na água de bebida de frangos de corte sobre o desempenho, o rendimento de carcaça, o metabolismo do cálcio, fósforo e nitrogênio e o perfil de ácidos graxos no músculo peitoral de frangos de corte. Foram utilizadas 1.120 pintos machos de um dia de idade da linhagem Cobb, distribuídas em um delineamento inteiramente casualisado, com quatro níveis de silício na água de bebida (0; 0,5mg; 1,0mg e 1,5mg do produto/100 kg de peso/dia), totalizando quatro tratamentos com oito repetições e 35 aves por parcela. A análise estatística dos dados foi realizada pelo método da análise de variância com o auxílio do procedimento GLM do SAS® e em caso de significância, os níveis de inclusão de silício foram estimados por intermédio dos modelos de regressão polinomial. A suplementação de silício via água de bebida promoveu efeito quadrático sobre a coxa+sobrecoxa com valor máximo de rendimento estimado em 28,87%. Com relação aos perfis de ácidos graxos observou - se efeito linear para os ácidos graxos vacênico, γ-linolênico, araquidico e palmítico e efeito quadrático para os ácidos graxos mirístico, miristoleico, palmitoleico e eicosadienoico. O silício modificou o perfil de ácidos graxos no músculo peitoral, bem como o rendimento de coxa+sobrecoxa das aves aos 49 dias de idade, podendo ser uma ferramenta importante a ser utilizada para a nutrição das aves.

The aim of this study was evaluate different levels of silicon in the drinking water of broilers on performance, carcass yield, metabolism of calcium, phosphorus and nitrogen and fatty acid profiles of pectoral muscle of broilers. A total of 1,120 one-day-old male Cobb chicks were used, distributed in a completely randomized design within four levels of silicon in the drinking water (0, 0.5 mg, 1.0 mg and 1.5 mg of silicon/100 kg/day), and eight replicates of 35 birds each . The data were analysed by the PROC GLM procedure of SAS® and in case of significance polynomial regressions were performed. Silicon supplementation in the drinking water promoted quadratic effect on thigh and drumstick with maximum yield estimated of 28.87%. For fatty acid profiles were observed linear effect for γ - linolenic, vaccenic, arachidonic and palmitic, and quadratic effect for myristic, myristoleic, palmitoleic and eicosadienoic. Silicon modified the fatty acid profiles of pectoral muscle as well as yield of thigh and drumstick of 49 days old birds, and could be an important tool to be used for poultry nutrition.

Efeito de níveis de silício na água de bebida sobre o desempenho, rendimento de carcaça, excreção de minerais e perfil de ácidos graxos no músculo peitoral de frangos de corte / Effect of levels of silicon in drink water of broiler on performance, carcass yield, excretion of minerals and fatty acid profile

O objetivo do estudo foi avaliar o efeito de níveis de silício na água de bebida de frangos de corte sobre o desempenho, o rendimento de carcaça, o metabolismo do cálcio, fósforo e nitrogênio e o perfil de ácidos graxos no músculo peitoral de frangos de corte. Foram utilizadas 1.120 pintos machos de um dia de idade da linhagem Cobb, distribuídas em um delineamento inteiramente casualisado, com quatro níveis de silício na água de bebida (0; 0,5mg; 1,0mg e 1,5mg do produto/100 kg de peso/dia), totalizando quatro tratamentos com oito repetições e 35 aves por parcela. A análise estatística dos dados foi realizada pelo método da análise de variância com o auxílio do procedimento GLM do SAS® e em caso de significância, os níveis de inclusão de silício foram estimados por intermédio dos modelos de regressão polinomial. A suplementação de silício via água de bebida promoveu efeito quadrático sobre a coxa+sobrecoxa com valor máximo de rendimento estimado em 28,87%. Com relação aos perfis de ácidos graxos observou - se efeito linear para os ácidos graxos vacênico, γ-linolênico, araquidico e palmítico e efeito quadrático para os ácidos graxos mirístico, miristoleico, palmitoleico e eicosadienoico. O silício modificou o perfil de ácidos graxos no músculo peitoral, bem como o rendimento de coxa+sobrecoxa das aves aos 49 dias de idade, podendo ser uma ferramenta importante a ser utilizada para a nutrição das aves.(AU)

The aim of this study was evaluate different levels of silicon in the drinking water of broilers on performance, carcass yield, metabolism of calcium, phosphorus and nitrogen and fatty acid profiles of pectoral muscle of broilers. A total of 1,120 one-day-old male Cobb chicks were used, distributed in a completely randomized design within four levels of silicon in the drinking water (0, 0.5 mg, 1.0 mg and 1.5 mg of silicon/100 kg/day), and eight replicates of 35 birds each . The data were analysed by the PROC GLM procedure of SAS® and in case of significance polynomial regressions were performed. Silicon supplementation in the drinking water promoted quadratic effect on thigh and drumstick with maximum yield estimated of 28.87%. For fatty acid profiles were observed linear effect for γ - linolenic, vaccenic, arachidonic and palmitic, and quadratic effect for myristic, myristoleic, palmitoleic and eicosadienoic. Silicon modified the fatty acid profiles of pectoral muscle as well as yield of thigh and drumstick of 49 days old birds, and could be an important tool to be used for poultry nutrition.(AU)

High-fiber diets with reduced crude protein for commercial layers

This study aimed at evaluating diets containing different fiber sources and two crude protein levels on the performance, egg quality, and nitrogen metabolism of commercial layers. In total, 392 48-wk-old Isa Brown layers were distributed according to a completely randomized experimental design in a 3x2+1 (control) factorial arrangement, resulting in seven treatments with seven replicates of eight birds each. Treatments consisted of three fiber feedstuffs (cottonseed hulls, soybean hulls, and rice hulls) and two dietary crude protein levels (12% and 16%). Cottonseed hulls associated with the high crude protein level (16%) resulted in the worst feed conversion ratio per dozen eggs. Diets with 16% crude protein resulted in the highest feed intake, egg production, egg weight, egg mass values, and improved feed conversion ratio (kg eggs/kg feed). The dietary inclusion of soybean hulls determined low yolk pigmentation, and of rice hulls, low egg specific gravity. The 16% crude protein diet with rice hulls promoted the best feed conversion ratio. Hens fed the reference diet presented higher egg mass and better feed conversion ratio per kg eggs and per dozen eggs. Hens fed the diets with low crude protein level (12%) had reduced nitrogen excretion, but presented worse egg production.