摘要
The experiment was conducted with the objective evaluating the different digestible threonine: digestible lysine ratio and supplementation or not of glycine on the performance of broilers in the period from eight to 21 days of age. Five hundred and sixty male broiler chicks of the Cobb strain were used, distributed in a completely randomized design, in a factorial arrangement of 3 x 2 + 1, with three digestible threonine:lysine ratio (55, 65 and 75%), supplemented or not with glycine plus an additional treatment, containing animal protein, with digestible threonine:lysine ratio of 65%. Eight replicates were used per treatment and 10 birds were used per experimental unit. The feed intake, the weight gain and the feed conversion were not influenced by the levels of threonine. The supplementation of glycine reduced the feed intake, increased the weight gain and improved the feed conversion of the birds. There was no interaction between the levels of threonine and the supplementation of glycine on the broilers performance. The supplementation of glycine was essential to improve the broiler chicks performance. The digestible threonine: lysine ratio of 55% (0.631% of digestible threonine), supplemented with glycine is sufficient to meet the requirements of broiler chicks from 8 to 21 days of age
摘要译文
第i个客观评价不同可消化苏氨酸：甘氨酸对肉鸡在此期间从八至21日龄的性能可消化赖氨酸的比例和补充或不科布应变的五百六十雄性肉鸡被使用，分布在完全随机的设计，在3×2 + 1中的因子安排，三可消化苏氨酸与赖氨酸的比例（55，65和75％25），补充或与甘氨酸加一个额外的处理，含有动物性蛋白质，与可消化苏氨酸：65％，25赖氨酸的比例八个重复每个处理中使用10鸟类每个实验单元 - 采食量被使用时，增重和饲料转化不是由苏氨酸的水平的影响甘氨酸的补充减少的饲料摄取量，增加了体重增加和提高了鸟的饲料转化有苏氨酸的水平和甘氨酸对肉鸡性能的补充剂之间没有交互作用甘氨酸补充是必不可少的提高肉鸡performanceThe可消化苏氨酸：55％25（可消化苏氨酸的0％25）赖氨酸的比例，补充有甘氨酸是足以满足从8至21天龄肉仔鸡的要求
BERNARDINO, Verônica Maria Pereira et al.. Glycine supplementation to broiler chicks subjected to diets with different digestible threonine: digestible lysine relations.[J]. Revista Brasileira de Saúde e Produção Animal, 2012,13(1): 173-180