Jensen L S, Manning B, Falen L, McGinnis J
Poult Sci. 1976 Jul;55(4):1394-1400. doi: 10.3382/ps.0551394.
Two experiments were conducted with Large White male turkeys to investigate the lysine requirement from 12 to 22 weeks of age. Six pens of 20 turkeys were fed each of the experimental diets. In experiment 1, a basal diet containing wheat, meat meal, cottonseed meal and distillers dried grains with solubles was supplemented with four levels of L-lysine. Lysine at 4.27% of protein and 2.31 g./mcal. of metabolizable energy from 16 to 20 weeks of age, and 1.83 g. from 20 to 22 weeks of age was inadequate for optimum growth and feed efficiency (16-22 weeks). Supplementing the diet with lysine from soybean meal gave performance equivalent to synthetic lysine, indicating that it was fully available. Performance of turkeys fed a diet containing 88% triticale from 16 to 20 weeks of age, and 72% from 20 to 22 weeks of age was equivalent to that of turkeys fed a more complex ration with an equivalent level of lysine. In experiment 2, Large White male turkeys were fed a basal diet composed largely of triticale and soybean meal from 12 to 20 weeks of age with different levels of added lysine. From 12 to 16 weeks of age, 3.11 g. lysine/mcal. of M.E. (4.9% of protein) was adequate for optimum growth and feed efficiency. From 16-20 weeks of age 2.36 g. lysine/mcal. of M.E. (4.3% of protein) was adequate for optimum performance. Although the estimated requirement from 16 to 20 weeks of age based on the two experiments differs (perhaps because of differences in lysine availability), the results suggest that the current N.R.C. recommendation may be higher than necessary.
进行了两项试验，以研究大白公火鸡12至22周龄时的赖氨酸需要量。将20只火鸡分成6栏，每栏投喂一种试验日粮。试验1中，一种由小麦、肉粉、棉籽粕和干酒糟及其可溶物组成的基础日粮补充了4个水平的L-赖氨酸。16至20周龄时，蛋白质中赖氨酸含量为4.27%、代谢能为2.31克/兆卡，20至22周龄时为1.83克，对于最佳生长和饲料效率而言（16 - 22周龄）是不足的。用豆粕补充日粮的火鸡性能与补充合成赖氨酸的相当，表明其赖氨酸完全可用。16至20周龄饲喂含88%小黑麦日粮、20至22周龄饲喂含72%小黑麦日粮的火鸡性能，与饲喂含等量赖氨酸的更复杂日粮的火鸡相当。试验2中，12至20周龄的大白公火鸡饲喂一种主要由小黑麦和豆粕组成的基础日粮，并添加不同水平的赖氨酸。12至16周龄时，每兆卡代谢能3.11克赖氨酸（占蛋白质的4.9%）足以实现最佳生长和饲料效率。16至20周龄时，每兆卡代谢能2.36克赖氨酸（占蛋白质的4.3%）足以实现最佳性能。尽管基于两项试验估计的16至20周龄赖氨酸需要量有所不同（可能是由于赖氨酸利用率的差异），但结果表明，当前美国国家研究委员会的建议量可能偏高。
