Suplementação de glutamina em dietas iniciais para frangos de corte
Carregando...
Arquivos
Data
2008-08-25
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The objective of this study was to evaluate the supplementation of glutamine in
the diet on performance, digestibility of nutrients and integrity of the intestinal
mucosa of broiler chicks. Were conducted three experiments at the Veterinary
School of the University Federal of Goias, using broiler chicks, male, with one
day of age. In Experiment I and II was evaluated the supplementation of
glutamine for chicks subjected to challenges of different intensities with Eimeria
acervulina or Eimeria ssp, and in Experiment III evaluated the effect of
supplementation of glutamine on diets containing ingredients of animal origin.
The performance was determinated by weight, weight gain, feed intake, feed
conversion rate and viability. The digestibility of nutrients was assessed with
determination of digestibility coefficients of dry matter, crude protein and ether
extract. The intestinal integrity was assessed by the villus height, crypt depth
and villus:crypt ratio of the small intestine. The data were submitted to the
analysis of variance and for the levels of glutamine was used polynomial
regression. In Experiment I after the challenge with Eimeria, were observed
better digestibility coefficients for dry matter, crude protein and ether extract
with glutamine supplementation on 1.0% (P<0.05). For the results of
histomorphometry at 14 days of age it was beneficial effect with the
supplementation on 1.0% of glutamine (P<0.05) in the villus height and crypt
depth in the duodenum. When challenged, the birds presented better results for
villus height and crypt depth in the duodenum at 21 days of age, and in the
duodenum and ileum at 28 days of age, when fed 1.0% of glutamine in the
ration. In Experiment II the glutamine supplementation did not increase the
digestibility coefficient of dry matter and fat on the period of this study.
Nevertheless there was significant regression for the digestibility for the second
period. On 21 days and 28 days of age the challenged birds showed bigger
villus height and crypt depth when the birds was supplemented with 1,0% of
glutamine on diet. In Experiment III there was positive quadratic effect (P<0,05)
for the crude protein coefficient of digestibility with the increasing levels of
glutamine in the ration. The birds belonged to the supplemented groups with
glutamine presented better results (P<0,05) for villus height and crypt depth in
the duodenum compared to the non-supplemented group. The level of 1,0% of
glutamine in the diet presented recovery in the integrity of the small intestine on
challenged birds, improving the coefficient of crude protein digestibility of the
diet. The utilization of ingredients from animal source in diets for broilers in the
initial phase did not harm the performance of chicks
Descrição
Citação
LOPES, Karina Ludovico de Almeida Martinez. Glutamine supplementation in starter diets for broilers
cutting. 2008. 86 f. Tese (Doutorado em Ciências Agrárias) - Universidade Federal de Goiás, Goiânia, 2008.