Glicerina bruta na alimentação de frangos de corte

• Autor(a) principal: Guerra, Rafael Lachinski de Holanda
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Estadual de Maringá (RI-UEM)
• Texto Completo: http://repositorio.uem.br:8080/jspui/handle/1/1754
• topic: Frango de corte; Composição química corporal; Digestibilidade; Rendimento de corte; Desempenho; Energia metabolizável; Subproduto; Glicerina; Brasil.; Broiler; Body composition; Digestibility; Cutting performance; Performance; Metabolizable energy; Byproduct; Glycerine; Brazil.; Ciências Agrárias; Zootecnia

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 (P<0.05) in the levels of crude glycerin inclusion on feed intake during the period of 21-42 days and a quadratic effect (P<0.05) for weight gain average weight and litter dry matter at 42 days old. There was no effect (P>0.05) on broiler chicken carcass yield. Considering the Dunnett´s procedure the feed intake in the 10% level shows to be different (P<0.05) than control, the average weight on 42 days of age also shows difference (P<0.05) than the control for 8 and 10% levels. In the Experiment 3, a completely randomized design was used with six levels of crude glycerine (0, 2, 4, 6, 8 and 10%) and five replicates with 32 birds each. Glycerine levels were used throughout the experimental period (1 to 42 days old). In the initial period (1 to 21 days old), there was an increasing linear effect (P<0.05) 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 (P> 0.05) for all variables. The litter moisture at 21 and 42 days increased linearly (P <0.05). Evaluating the performance by Dunnett's test in the period from 1 to 21 days, it was different (P<0.05) for feed intake and feed conversion for treatments with 8 and 10% and differed from control. For growth period (22 to 42 days) there was difference (P<0.05) for feed conversion and weight gain in the 10% level of inclusion compared with control. From 1 to 42 days, feed conversion, 8 and 10% levels of inclusion were different (P<0.05) compared to control and for 10% level of inclusion was observed a difference (P<0.05) compared to control, for weight gain and weight. For the parameters of carcass and analyzes of chemical composition were not observed (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) from control. The utilization of crude glycerine, a byproduct of biodiesel production in feed formulation for broilers, is possible, but it should be done a better evaluation of its nutrient supply which should be taken into account at the time of its inclusion in broilers rations, so that the composition of the diet is balanced.