Glicerina bruta na alimentação de frangos de corte

Three experiments were carried out to determine the energy value of crude glycerine from biodiesel production and to evaluate performance carcass yield carcass composition and feathers of broiler chickens feeding with increasing levels of crude glycerine. Experiment 1 was conducted using 72 broilers with 18 days of age distributed in metabolism cages. It was used a completely randomized experimental design with two treatments and six replicates of nine birds each. To determine the energy value, the method of total excreta collection, using ferric oxide as a marker was used. Crude glycerine replaced 10% of reference diet. The value of apparent metabolizable energy of crude glycerine was 2,632.59 kcal/kg. In the Experiment 2 were used 960 broilers at 21days of age distributed in a completely randomized design with six levels of crude glycerine (0, 2, 4, 6, 8 and 10%) and five replicates with 32 birds each. There was a linear effect (P0.05) on broiler chicken carcass yield. Considering the Dunnett´s procedure the feed intake in the 10% level shows to be different (P 0.05) for all variables. The litter moisture at 21 and 42 days increased linearly (P 0.05) differences of levels of 0; 2; 4; 6; 8; and 10% to control. Considering litter moisture at 21 days the levels of 4, 6, 8 and 10% and at 42 days and the levels of 8 and 10% for inclusion were different (P 0,05) sobre as variáveis de rendimento de carcaça. Pelo teste de Dunnett, o consumo de ração para o nível de 10% e o peso médio corporal para os níveis de 8 e 10% diferiram (P0,05) pelos tratamentos experimentais. Pelo teste de Dunnett, no período de 1 a 21 dias, houve diferença (P0,05) dos níveis 0; 2; 4; 6; 8 e 10% em relação à ração-controle. Para a umidade de cama aos 21 dias, os níveis superiores a 2% e aos 42 dias os níveis superiores a 6% de inclusão foram (P