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Crude glycerine mixture in diets of broiler chickens (1 to 42 days) Glicerina bruta mista na alimenta o de frangos de corte (1 a 42 dias)

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Abstract:

Two experiments were conducted to evaluate the effect of inclusion of different levels of crude glycerine mixture in the broilers feeding on performance, carcass yield and carcass composition. 960 broilers were used at 21 days of age distributed in a completely randomized design with six levels of crude glycerine mixture (0; 2; 4; 6; 8 and 10%) and five replicates with 32 birds each. In the Experiment 1, for the growth period (22 to 42 days), was a linear effect in the levels of crude glycerine mixture inclusion on feed intake and a quadratic effect for weight gain, average weight and litter dry matter at 42 days old. There was no effect on broiler chicken carcass yield. In the Experiment 2, in the initial period (1 to 21 days), there was an increasing linear effect for feed intake and feed conversion. The same behavior was observed only for feed conversion in the period of 1 to 42 days. For chemical composition analysis of birds were not observed effects for all variables. The litter moisture at 21 and 42 days increased linearly. The utilization of crude glycerine mixture, byproduct of biodiesel production in feed formulation for broilers is possible, however should be better evaluated, for all the nutrients of its composition that could come into the diet balance, making possible to the broilers to have a nice performance. Dois experimentos foram conduzidos com o objetivo de avaliar o efeito da utiliza o de diferentes níveis de glicerina bruta mista na alimenta o de frangos de corte sobre o desempenho, o rendimento de carca a e a composi o química corporal das aves. Foram utilizadas 960 aves da linhagem cobb, distribuídas em delineamento inteiramente casualizado, com seis níveis de inclus o de glicerina bruta mista na dieta (0; 2; 4; 6; 8 e 10%) e cinco repeti es com 32 aves cada. No experimento I, para o período de crescimento (22 a 42 dias), observou-se efeito linear dos níveis de inclus o de glicerina bruta mista sobre o consumo de ra o e efeito quadrático para ganho de peso, peso médio corporal e matéria seca da cama, aos 42 dias de idade. N o foi observado efeito sobre as variáveis de rendimento de carca a. No Experimento II, de um a 21 dias observou-se efeito linear crescente para o consumo de ra o e convers o alimentar em fun o dos níveis de glicerina bruta mista na ra o. O mesmo foi observado para a convers o alimentar no período total de um a 42 dias. A umidade de cama aos 21 e aos 42 dias apresentou aumento linear crescente, a composi o química corporal das aves n o foi influenciada pelos níveis de glicerina mista adicionados à ra

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