Interaction effects of glycine equivalent and standardized ileal digestible threonine in low protein diets for broiler grower chickens

• DOI: 10.5713/ab.23.0307
• Publication Date: 2024-02-22T07:45:36Z
• Authors: Paschal Chukwudi ...; Amanda Barroso C...; Camilo Ivan Ospi...; Eustace Ayemere ...; Paulo Cesar Pozza; Alice Eiko Murakami
• Keywords: muscle creatine; serum biochemistry; QL1-991; 0402 animal and dairy science; 04 agricultural and veterinary sciences; broiler; glycine equivalent; Zoology; performance; threonine; Article

Objective: This study aims to investigate the interactive effect of a glycine equivalent (Glyequi) and standardized ileal digestible threonine (SID Thr) levels in low crude protein diets on performance, blood biochemistry, pectoral muscular creatine content oxidative stability meat broiler chickens from 21 42 days.Methods: A total 1,500, twenty-one-day-old Cobb-Vantress male were distributed completely randomized 5×3 factorial arrangement Glyequi×SID Thr with five replicates 20 birds each. Fifteen dietary treatments 16.5% CP formulated contain Glyequi (1.16%, 1.26%, 1.36%, 1.46%, 1.56%) three SID (0.58%; 0.68% 0.78%).Results: Interaction effects (p<0.05) observed for weight gain, carcass yield, serum uric acid. Higher increased (p = 0.040) gain 0.58% compare 0.78% diet. The level at improved feed conversion compared other diets. Levels equal or above 1.26% resulted higher 0.033) content. breast yield diet was 0.05) There quadratic 0.008), 0.030), concentrations 0.040), optimal estimated be 1.47%, 1.35%, 1.40% Glyequi, respectively. lowest 0.050) concentration malondialdehyde found 1.36% Glyequi. Conclusion: minimum needed improve performance is adequate chickens.