添加N-乙酰-DL-蛋氨酸对绵羊消化代谢的影响

本试验选取4只体重约40 kg的中国美利奴（新疆型）细毛羊，采用分期试验设计，在第一期试验中每天每只添喂蛋氨酸2.35 g(对照组)，第二期试验中每天每只添喂N-乙酰-DL-蛋氨酸3.06 g(试验组)，以研究添加N-乙酰-DL-蛋氨酸对绵羊消化代谢的影响。结果表明，添加蛋氨酸组和添加N-乙酰-DL-蛋氨酸组的纤维素消化率分别为50.64%±6.46%，61.98%±5.44%，半纤维素消化率分别48.92%±1.69%，54.96%±3.95%，钙的表观消化率分别为15.12%±1.07%，18.27%±2.04%，两者间均差异显著（P<0.05）。因此，添加N-乙酰-DL-蛋氨酸，可以提高绵羊对日粮中纤维素和半纤维素的消化率，提高钙的保留量、保留率。

Effects of Supplemental N-Acetyl-DL_Methionine on Digestion and Metaboism of Sheep

Four male China merino (Xinjiang type) sheep of 40 kg live weight were used to investigate effects of supplementation N-Acetyl-DL-Methionine on digestion and metabolism of sheep in two periods. Sheep were supplied with 2.35 g methionine per day in the first period and with 3.06 g N-Acetyl-DL-Methionine per day in the second period. The results indicated that digestibility of cellulose in control and treatment were 50.64%±6.46% and 61.98%±5.44%(P＜0.05), the digestibility of hemicellulose were 48.92%±1.69% and 54.96%±3.95%(P＜0.05), the apparent digestibility of calcium were 15.12%±1.07% and 18.27%±2.04%(P＜0.05). It concluded that the digestibility of cellulose and hemicellulose were improved by supplementation with N-Acetyl-DL-Methionine. The amount and rate of retention of calcium were also improved by the supplementation.