Methionine + cystine levels for broilers from 1 to 21 and from 22 to 42 days of age

Revista Brasileira de Zootecnia

Rostagno, Horacio Santiago¹  Vargas Junior, José Geraldo¹  Silva, Martinho de Almeida e¹  Silva, Shirley Helena Mendes da¹  Albino, Luiz Fernando Teixeira¹ 

[1] UFV, Viçosa

关键词: requirement;    broiler;    methionine + cystine    Introdução Tamanho corporal e taxa de crescimento são determinados pelo genótipo do animal;    que é caracterizado pela diferença na eficiência de digestão;    na absorção de nutrientes e no metabolismo destes;   

DOI  :  10.1590/S1516-35981999000300012

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

This experiment was carried out to determine the nutritional requirement of methionine + cystine (sulfur amino acids) for Hubbard and Ross broilers from 1 to 21 and from 22 to 42 days of age, of both sexes. Weight gain, intake, feed:gain and carcass composition were evaluated. Two thousand and four hundred broilers were used in the phase from 1 to 21 of age and 1800 broilers in the phase from 22 a 42 days of age. Basal diets with 21 and 19% of the CP and 3000 and 3100 kcal ME/kg were supplemented with six levels of methionine + cystine in the phases from 1 to 21 and from 22 to 42 of age, respectively. The estimated requirements of methionine + cystine ( 0; .06; .12; .18; .24; and .30) for the phase from 1 to 21 days were. 886% and .896%, .890% and .868% and for the phase from 22 to 42 days, .795%, and .802%, .810% and .792% for Hubbard and Ross male and female, respectively.

【 授权许可】

CC BY-NC