Asche G L, Lewis A J, Peo E R, Crenshaw J D
J Anim Sci. 1985 Jun;60(6):1412-28. doi: 10.2527/jas1985.6061412x.
One-hundred-ninety-two weanling pigs from two separate trials, (initial weight 6.0 and 5.6 kg) and 400 growing-finishing pigs (initial weight 17 kg) were fed normal and high lysine corn diets containing four levels of lysine in a 2 X 4 factorial arrangement. Crossbred (Large White X Landrace X Duroc) pigs were used in all experiments. The objectives of the experiments were to (1) compare normal and high lysine corn when fed at different lysine levels, (2) determine the lysine requirements for the three stages of growth and (3) evaluate the effect of protein level on the lysine requirement. All diets were balanced on a lysine basis. The results indicated that both weanling and growing-finishing pig performance and final carcass composition were similar for pigs fed normal or high lysine corn diets balanced on a lysine basis. Weanling pigs from 5 to 14 kg required at least 1.10% lysine. Based on changes in body weight gain and feed efficiency, the lysine requirement of growing pigs (17 to 54 kg) was .70%, and that of finishing pigs (54 to 101 kg) was .50%. However, based on lean tissue growth rate (as reflected by longissimus muscle area and percentage of lean in the carcass) the requirement was at least .75% during the growing stage and .60% during the finishing stage. The reduced protein level (2% lower) of the high lysine corn diets did not reduce the lysine required by pigs compared with those fed normal corn.
来自两项独立试验的192头断奶仔猪（初始体重6.0和5.6千克）和400头生长育肥猪（初始体重17千克）被饲喂正常赖氨酸水平和高赖氨酸水平的玉米日粮，日粮含有四个赖氨酸水平，采用2×4析因设计。所有试验均使用杂交猪（大白猪×长白猪×杜洛克猪）。试验目的是：（1）比较不同赖氨酸水平下正常赖氨酸玉米和高赖氨酸玉米；（2）确定三个生长阶段的赖氨酸需要量；（3）评估蛋白质水平对赖氨酸需要量的影响。所有日粮均以赖氨酸为基础进行平衡。结果表明，对于以赖氨酸为基础平衡的正常赖氨酸玉米日粮和高赖氨酸玉米日粮，断奶仔猪和生长育肥猪的生产性能以及最终胴体组成相似。5至14千克的断奶仔猪至少需要1.10%的赖氨酸。根据体重增加和饲料效率的变化，生长猪（17至54千克）的赖氨酸需要量为0.70%，育肥猪（54至101千克）的赖氨酸需要量为0.50%。然而，根据瘦肉组织生长率（以背最长肌面积和胴体瘦肉百分比反映），生长阶段的需要量至少为0.75%，育肥阶段为0.60%。与饲喂正常玉米的猪相比，高赖氨酸玉米日粮中降低的蛋白质水平（低2%）并未降低猪对赖氨酸的需要量。
