Efeito da inoculação in ovo de soluções nutritivas sobre o desempenho e o rendimento de carcaça de frangos de corte

• Autor(a) principal: Campos, Anastácia Maria de Araújo
• Data de Publicação: 2007
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5559
• topic: Inoculação "in ovo"; Frango de corte; Innoculation "in ovo"; Broiler; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

The objective of this work was to evaluate the effects of in ovo inoculation of nutritious solutions on the hatchability, the performance, the carcass weight gain and the immune system of cut chickens within 21 days. A total of 2400 eggs from head offices Cobb, which were 40 weeks old, were incubated in 4 different dates. At the 17.5th day of incubation the eggs were inoculated with 0.5 mL of the following solutions: 0.5% saline solution, 2.0% glucose + 2.0% sucrose solution, 2.5% glucose + 3.0% sucrose solution, vitamins solution or, solution of minerals. The control group was whole eggs not inoculated. The used design was in blocks randomized with 6 treatments. Each treatment was represented by 70 replicates, being each egg the experimental unit. After eggs hatching, the hatchability of each treatment was evaluated, the chicks were sexed and placed in different places, being the design of the experiment a 2 x 6 factorial arrangement (2 sex and 6 solutions) with 8 replicates from 12 to 16 birds for each experimental unit. The animals and ration supplied were weighted at 7 and 21 days to determine the weight gain, the ration consumption and, the alimentary conversion. The birds were butchered at 21 days to determine the chest, chest filet and leg weight gains. Four birds in each replicate were used for determination of the relative weight of spleen, thymus and bursal. The inoculation of the solutions in ovo reduced the egg hatchability, increasing the number of pecked and not unhatched eggs. The solutions of 2.0% of glucose + 2.0% of sucrose, of vitamins and minerals did not affect the growth, weight gain or immune system of the birds. However, the inoculation of 2.5% of glucose + 3.0% of sucrose produced a better alimentary conversion at the 21 days of age and increased 4.07%, 5.07% and 5.47% in the weight gain, the chest with bones weight and in the chest filet weight, respectively. The manual inoculation of nutritious solutions at the 17,5th day of incubation provides smaller hatchability rate, nevertheless the inoculation of nutritious solution containing 2.5% of glucose + 3.0% of sucrose produce larger weight gain at 14 and 21 days, and better alimentary conversion, larger chest with bones and chest filet gains in the birds at 21 days of age.