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Impact of initial nutrition on broilers development


Seven experiments are performed to evaluate the impact of nutrition on the initial development of broilers. In the first experiment will assess the supply of fish oil for broiler chickens. In the second, the use of different levels of dietary hydrolyzed yeast. Experiemntos the third and fourth, respectively, will be evaluated supplementation of zinc and manganese for broilers supplemented the organic form of glycinate. In the fifth experiment will assess the supply of a vitamin complex for birds. In the sixth experiment will evaluate different nutritional strategies for broilers through the provision of water, different solutions of corn syrup and a pre-starter diet compared with a group of birds that do not receive any type of nutrient. The seventh trial will evaluate the development of broilers receiving the results of the supplementation of nutrients provided nso experiments 1 to 6, ie, fish oil, hydrolyzed yeast, zinc, manganese and vitamin supplement. In each experiment 1,500 embryonated eggs are incubated to be used, after the outbreak, 1,050 birds distributed in a completely randomized in factorial scheme 5 x 2: 5 nutrients and two sexes (males and females), totaling 10 treatments with 7 replicates of 15 birds each. The experimental treatments will be provided soon after hatching and the birds are kept in crates of chicks for a period of 5 hours. Soon after, the birds will be housed in their experimental boxes. After housing the birds receive the same diet, according to their phase of creation, designed to meet the requirements estabalecidas by Rostagno et al. (2011). Performance data will be assessed (weight gain, feed intake and feed conversion) and at the end of the experiments, 45 days, two birds of each repeat are slaughtered to evaluate carcass characteristics (carcass yield, breast, legs and abdominal fat). For the analysis of allometry of the digestive organs, 700 birds (in each experiment) will be housed in metal batteries up to 12 days old and that on days 0, 3, 6, 9:12, a bird will be killed by repetition. The data obtained will be analyzed using the GLM procedure of SAS (2003) and the averages compared by Tukey test at 5% probability. (AU)

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