丙氨酰谷氨酰胺对断奶仔猪生长性能及血清生化指标的影响

本文旨在研究丙氨酰谷氨酰胺（Ala-Gln）对断奶仔猪生长性能和血清生化指标的影响。试验选择大长白二元杂交仔猪48头，21 d断奶，随机分成4组，每组6个重复，每重复2头（公母各1头）。A组为对照组，饲喂基础日粮；B、C和D组为试验组，分别饲喂在基础日粮添加0.1%、0.3%和0.5% Ala-Gln的日粮，试验期20 d。结果表明，在21 d断奶仔猪日粮中添加0.1% Ala-Gln可显著提高21~31 d仔猪的平均日增重和饲料转化率（P<0.05），添加0.1%、0.3%和0.5% Ala-Gln可在正常生理范围内降低仔猪血清葡萄糖、甘油三酯、总胆固醇和尿素氮含量，提高仔猪血清总蛋白含量，随着日粮中Ala-Gln添加水平提高，21~31 d仔猪的平均日增重和饲料转化率均以二次曲线方式升高（二次，P=0.042和0.043），31和41 d血清葡萄糖含量、31 d血清甘油三酯、总胆固醇和尿素氮含量以线性方式下降（线性，P=0.034，0.001，0.008和0.001）。添加0.3%Ala-Gln就可达到理想的促生长效果。提示Ala-Gln可提高断奶仔猪生长性能。

Effect of Alanyl-Glutamine on Growth Performance and Serum Biochemical Indexes of Weaned Piglets

This trial conducted to study the effects of alanyl-glutamine (Ala-Gln) on growth performance and serum biochemical indexes of weaned piglets. Forty eight crossbred Landrace×Largewhite weaned piglets at the age of 21 day were selected and randomly divided into 4 treatments with 6 replicates 2 piglets (a male, a female). Group A (control) was fed the basal diet and Group B, C and D as three trial groups were fed the basal diet added 0.1%, 0.3% and 0.5% Ala-Gln respectively and the trial lasted 20 days. The results showed that average daily gain and feed conversion rate were significantly increased（P<0.05） by adding 0.1% Ala-Gln and level of serum glucose, triglyceride, total cholesterol and blood urea nitrogen were decreased and serum total protein was increased within the framework of physiological by adding 0.1%,0.3% and 0.5% Ala-Gln. With the increasing Ala-Gln supplementation levels, average daily gain and feed conversion rate were increased (quadratic, P=0.042 and 0.043) at 21~31 day and level of serum glucose at 31 and 41 day and level of serum triglyceride and total cholesterol and blood urea nitrogen at 31 day were decreased (linear, P=0.034,0.001,0.008, 0.001 and 0.062) and supplementation 0.3% Ala-Gln had the best effect. The results indicated the mechanism of Ala-Gln promoting growth performance in weaned piglets.