Robbins K R
Department of Animal Science, University of Tennessee, Knoxville 37901-1071.
Poult Sci. 1987 Sep;66(9):1531-4. doi: 10.3382/ps.0661531.
The threonine requirement of the young broiler chick was estimated in two experiments. In Experiment 1, a threonine-deficient corn-peanut meal-amino acid mixture was included in a basal diet at levels equivalent to 15 and 20% crude protein. In Experiment 2, a purified crystalline amino acid mixture, also limiting in threonine, was included in a basal diet at levels equivalent to 10.98 and 18.3% crude protein. When expressed as a percent of diet, the estimated threonine requirements increased as dietary protein content increased. However, when expressed as a percent of dietary protein, the estimated threonine requirements were not significantly affected by dietary protein content, and were similar for the two experiments. It was concluded that the threonine requirement is 3.7% of dietary crude protein, and is little affected by dietary protein content.
通过两项试验对幼龄肉仔鸡的苏氨酸需要量进行了估计。在试验1中，一种缺乏苏氨酸的玉米-花生粕-氨基酸混合物被添加到基础日粮中，其含量相当于粗蛋白的15%和20%。在试验2中，一种同样缺乏苏氨酸的纯化结晶氨基酸混合物被添加到基础日粮中，其含量相当于粗蛋白的10.98%和18.3%。当以日粮百分比表示时，估计的苏氨酸需要量随着日粮蛋白质含量的增加而增加。然而，当以日粮蛋白质百分比表示时，估计的苏氨酸需要量不受日粮蛋白质含量的显著影响，并且在两项试验中相似。得出的结论是，苏氨酸需要量为日粮粗蛋白的3.7%，且受日粮蛋白质含量的影响较小。
