Uso do concentrado proteico de soja para frangos de corte de 1 a 21 dias de idade
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Data
2014-06-16
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Universidade Federal de Goiás
Resumo
Two experiments to evaluate the effect of the use of soy protein concentrate
(SPC) in the diet of broilers from one to 21 days of age were performed. In the first
experiment 600 broiler, males, of Cobb, from one to 40 days of age, were
distributed in a completely randomized design (CRD) with four treatments, six
replicates and 25 birds per experimental unit. Treatments consisted of four levels
of inclusion of soy protein concentrate (0, 30, 60 and 90 g/kg) levels of pre-starter
and starter diets. The parameters evaluated were: performance, enzyme
production in the pancreas, gut integrity and immune parameters. In the second
experiment, 144 broilers, males, of Cobb, from one to 21 days of age, distributed
in CRD with four treatments, six replicates, and six birds per experimental unit.
These birds were fed with experimental diets from 14 to 21 days of age and total
excreta, to review the metabolization of rations, collected from 18 to 21 days old.
The treatments were the same as in the first experiment. The results were
submitted to ANOVA and Scott-Knott test; the polynomial regression; the nonparametric
analysis (Kruskal-Wallis) and Bonferroni test; adopted was α = 0.05.
The use of 30 and 90 g/kg SPC did not affect the weight gain, feed intake, feed
conversion or the viability of the poultry. The use of 30 and 60 g/kg of SPC in the
diet increased the activity of trypsin and the use of 90 g/kg increased amylase
activity. The villus length and crypt depth in the small intestine increased with the
use of 60 and 90 g/kg of SPC in the diet and the villous:crypt of the jejunum
increased in the absence of SPC. The total leukocytes, eosinophils and
lymphocytes and the dosage of immunoglobulin A (IgA) serum levels were not
influenced by the SPC proposed in this study. The metabolization coefficient of dry
matter (CMMS) increased linearly with the addition of SPC, although the
metabolization coefficient of ash (CMCz) has reduced linearly.
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VASCONCELOS, Luciana Guimarães. Uso do concentrado proteico de soja para frangos de corte de 1 a 21 dias de idade. 2014. 64 f. Dissertação (Mestrado em Ciência Animal) - Universidade Federal de Goiás, Goiânia, 2014.