Dietary supplementation of glutamine and glutamic acid on performance, intestinal morphometry, and carcass characteristics of broiler quails/Suplementacao dietetica de glutamina e acido glutamico sobre o desempenho, morfometria intestinal e caracteristicas de carcaca de codornas de corte

This study evaluated the effect of dietary supplementation with glutamine and glutamic acid (Gln+Glu) on performance, intestinal morphometry, and carcass characteristics of broiler quails. Eight hundred birds were used, distributed in an entirely randomized design with 20 birds per experimental unit...

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Bibliographic Details
Published in:Ciência rural Vol. 54; no. 3; p. 1
Main Authors: Silva, Jr., Paulo Antonio da, Givisiez, Patricia Emilia Naves, Costa, Fernando Guilherme Perazzo, Celso Oliveira, Jose Bruno de, Jose Silva, Humberto Vilar da, Lana, Geraldo Roberto Quintao, Lana, Sandra Roseli Valerio, Romilton Junior, Ferreira de Barros
Format: Journal Article
Language:English
Portuguese
Published: Universidade Federal de Santa Maria 01-03-2024
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Summary:This study evaluated the effect of dietary supplementation with glutamine and glutamic acid (Gln+Glu) on performance, intestinal morphometry, and carcass characteristics of broiler quails. Eight hundred birds were used, distributed in an entirely randomized design with 20 birds per experimental unit, and given five treatments (0.0; 0.2; 0.4; 0.6; and 0.8% Gln+Glu supplementation) with eight replicates. At 1-21 days of age, lower (P < 0.05) feed intake at 0.6 and 0.8% Gln+Glu supplementation and lower weight gain at 0.8% Gln+Glu supplementation compared to the control treatment were observed. By regression analysis, excluding the control treatment, there was an increasing linear effect (P < 0.05) for feed intake at 22 to 42 days of age. For intestinal morphometry, Gln+Glu supplementation only favored the villus development of the ileum (P < 0.05), giving it greater height at 0.2, 0.6, and 0.8% supplementation. Carcass characteristics, cuts, and edible viscera of the birds at 42 days were not affected (P > 0.05) by Gln+Glu supplementation levels. Thus, the glutamine and glutamic acid supplementation affected the performance and intestinal morphology of 21-d-old quails, decreasing feed intake and weight gain associated with the improvement of ileum morphology; conversely, performance and carcass characteristics at 42 days were not affected by amino acid supplementation. Key words: Coturnix, glutamate, intestinal morphophysiology, cell renewal. Objetivou-se avaliar o efeito da suplementacao dietetica de glutamina e acido glutamico (Gln+Glu) sobre o desempenho, a morfometria intestinal e as caracteristicas de carcaca de codornas de corte. Foram utilizadas 800 aves, distribuidas em delineamento inteiramente casualizado, com cinco tratamentos (0,0; 0,2; 0,4; 0,6 e 0,8% de suplementacao de Gln+Glu) e oito repeticoes com 20 aves por unidade experimental. Na fase de um a 21 dias, constatou-se menor (P < 0,05) consumo de racao aos niveis de 0,6 e 0,8% de Gln+Glu e menor ganho de peso ao nivel 0,8% de Gln+Glu em comparacao ao tratamento controle; e, pela analise de regressao, excluindo-se o tratamento controle, houve efeito linear crescente (P < 0,05) para consumo de racao na fase 22 a 42 dias de idade. Para morfometria intestinal, a suplementacao de Gln+Glu apenas favoreceu o desenvolvimento vilos do ileo (P < 0,05), conferindo-lhe maior altura aos niveis de 0,2; 0,6 e 0,8% de suplementacao. As caracteristicas de carcaca, cortes e visceras comestiveis das aves aos 42 dias nao foram afetadas (P > 0,05) pelos niveis de suplementacao de Gln+Glu. Assim, a suplementacao de glutamina e acido glutamico influenciou o desempenho e a morfometria intestinal de codornas de corte aos 21 dias de idade, promovendo reducao do consumo de racao e do ganho, associado ao aumento morfometrico do ileo; por outro lado, o desempenho das aves e as suas caracteristicas de carcaca aos 42 dias nao foram afetados pela suplementacao dos aminoacidos. Palavras-chave: Coturnix coturnix, glutamato, morfofsiologia intestinal, renovacao celular.
ISSN:0103-8478
DOI:10.1590/0103-8478cr20210540