Effect of oral dietary supplement for chicks subjected to thermal oscillation on performance and intestinal morphometry/ Efeito de suplemento nutritivo oral em pintainhos submetidos a oscilacao termica sobre o desempenho e a morfometria intestinal
The aim of the study was to evaluate the efficacy of a nutritional formulation based on amino acids and vitamins supplemented in the drinking water for chicks in the first week of life subjected to thermal oscillation on performance, organ development and intestinal morphometry from 1 to 21 days. 64...
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Published in: | Acta scientiarum. Animal sciences Vol. 39; no. 4; p. 385 |
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Main Authors: | , , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Universidade Estadual de Maringa
01-10-2017
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Subjects: | |
Online Access: | Get full text |
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Summary: | The aim of the study was to evaluate the efficacy of a nutritional formulation based on amino acids and vitamins supplemented in the drinking water for chicks in the first week of life subjected to thermal oscillation on performance, organ development and intestinal morphometry from 1 to 21 days. 640-male broiler chicks were distributed in a 2x2 factorial completely randomized design (with or without dietary supplementation and at comfort temperature or thermal oscillation). Chicks subjected to thermal oscillation presented worse performance (p < 0.05) than those under thermal comfort of 1 to 7, 1 to 14 and 1 to 21 days. Nutritional supplementation did not alter the performance (p < 0.05) of the birds, but resulted in a higher body weight (p < 0.05) regardless of the environmental thermal condition. At 7 days, chicks under thermal comfort had better intestinal morphometric parameters (p < 0.05), in relation to birds under thermal oscillation. In conclusion, the temperature oscillations caused negative consequences to the productive performance and the intestinal morphology of chicks for which dietary supplementation was not enough to mitigate the effects of the environmental challenge during the first week of life of the birds. Keywords: broilers, weight gain, intestinal mucosa, ambient temperature, post-hatching. O objetivo do trabalho foi avaliar a eficacia de uma formulacao nutricional a base de aminoacidos e vitaminas suplementadas na agua de bebida de pintainhos na primeira semana de vida, submetidos a oscilacao termica sobre o desempenho produtivo, desenvolvimento de orgaos e morfometria intestinal de um a 21 dias. Foram utilizados 640 pintos de corte machos, distribuidos em um delineamento inteiramente casualizado em esquema fatorial 2x2 (com suplementacao nutritiva oral ou nao e em temperatura de conforto ou oscilacao termica). As aves submetidas a oscilacao termica apresentaram pior desempenho (p < 0,05) em relacao as aves do grupo conforto termico de um a sete, um a 14 e um a 21 dias. A suplementacao nutritiva nao alterou o desempenho (p < 0,05) das aves, mas resultou em maior peso dos orgaos (p < 0,05) independentemente da condicao termica ambiental. Aos sete dias, as aves em conforto termico apresentaram melhores parametros morfometricos intestinais (p < 0,05), em relacao as aves submetidas a oscilacao termica. Em conclusao, as oscilacoes de temperatura ocasionaram consequencias negativas ao desempenho produtivo e a morfologia intestinal das aves na qual a suplementacao nutritiva nao foi suficiente para amenizar os efeitos do desafio ambiental na primeira semana de vida das aves. Palavras-chave: frangos de corte, ganho de peso, mucosa intestinal, temperatura ambiente, pos-eclosao. |
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ISSN: | 1806-2636 |
DOI: | 10.4025/actascianimsci.v39i4.33279 |