Schutte J B, Smink W
TNO-Institute of Animal Nutrition and Physiology (ILOB), Wageningen, The Netherlands.
Poult Sci. 1998 May;77(5):697-701. doi: 10.1093/ps/77.5.697.
A study was conducted to determine the requirement for lysine of a White Leghorn strain of hens with a body weight of approximately 1,600 g. Before starting the experiment, apparent fecal digestibility of amino acids of the basal diet was determined in an in vivo digestibility trial with six individually housed hens. The basal diet used was based on corn and soybean meal and contained 0.65% total and 0.49% apparent fecal digestible lysine. To the basal diet, seven graded dose levels (0.04, 0.08, 0.12, 0.16, 0.20, 0.24, and 0.28%) of lysine as L-Lysine x HCl were added. The experimental diets were fed for 12 wk, covering the early stage of laying from 24 to 36 wk of age. Each experimental diet was fed to 60 individually caged housed birds. The dietary lysine requirement was found to be higher for maximizing efficiency of feed utilization than for obtaining maximum egg mass yield. Based on the feed conversion efficiency and at an egg mass yield of 57 g/hen-d, the requirement for total lysine was estimated to be about 900 mg/hen-d. From the results of the digestibility trial, it was calculated that the estimated requirement for total lysine was equivalent to 720 mg apparent fecal digestible lysine per hen-day.
进行了一项研究，以确定体重约1600克的白来航鸡品系母鸡的赖氨酸需求量。在开始实验前，通过对六只单独饲养的母鸡进行的体内消化率试验，测定了基础日粮氨基酸的表观粪便消化率。所用基础日粮以玉米和豆粕为基础，总赖氨酸含量为0.65%，表观粪便可消化赖氨酸含量为0.49%。向基础日粮中添加了七个梯度剂量水平（0.04%、0.08%、0.12%、0.16%、0.20%、0.24%和0.28%）的L-赖氨酸盐酸盐形式的赖氨酸。实验日粮喂养12周，涵盖24至36周龄的产蛋早期。每种实验日粮喂给60只单独笼养的鸡。结果发现，为使饲料利用效率最大化，日粮赖氨酸需求量高于获得最大蛋重产量时的需求量。基于饲料转化率以及蛋重产量为57克/只·天，估计总赖氨酸需求量约为900毫克/只·天。根据消化率试验结果计算得出，估计每只母鸡每天对总赖氨酸的需求量相当于720毫克表观粪便可消化赖氨酸。
