Effect of Methionine Source and Dietary Crude Protein Level on Growth Performance, Carcass Traits and Nutrient Retention in Chinese Color-feathered Chicks

Autor:	C. T. Zheng, G. L. Song, M. V찼zquez A챰처n, G. F. Yi, P. B. Xi, Y. C. Lin, Z. Y. Jiang, C. D. Knight
Rok vydání:	2007
Předmět:	Methionine Thigh muscle Protein level Biology Feed conversion ratio Breast muscle Whole body composition chemistry.chemical_compound Nutrient Starter chemistry Animal Science and Zoology Food science Food Science
Zdroj:	Asian-Australasian Journal of Animal Sciences. 20:962-970
ISSN:	1976-5517 1011-2367
Popis:	A total of 1,200 LinNan Chinese color-feathered chicks were used to study the effects of methionine source [DL-2-hydroxy-4-methylthio-butanoic acid (HMTBa) or DL-methionine (DLM)] and dietary crude protein (CP) level on growth performance, carcass traits, and whole-body nitrogen and fat retention. The trial was designed as a 2x2 factorial arrangement, including two CP levels (adequate and low) and two methionine sources (HMTBa and DL-methionine). Diets were formulated for three phases, starter (0-21 d), grower (21-42 d), and finisher (42-63 d). Chicks fed HMTBa had higher daily gain and improved feed efficiency than DLM during the grower phase (p 0.05). Chicks fed low-CP diets grew slower, used feed less efficiently during the grower, finisher phase and overall. On d 42, regardless of dietary CP levels, birds fed HMTBa had higher carcass weights, breast and thigh weights than DLM-fed birds (p
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0fe3e2c1927e06d7744fb80e9cfcdb7e https://doi.org/10.5713/ajas.2007.962 Zobrazit plný text záznamu