谷氨酰胺对断奶仔猪生长性能的影响

Effects of glutamine on growth performance of weanling piglets

选取21日龄断奶杜大长仔猪60头(体重接近5 kg),按试验要求随机分成2组,每组设3个重复,每个重复10头.研究饲粮中添加1%谷氨酰胺对断奶仔猪生长的影响.结果表明,试验组在第9 d后腹泻率明显下降,而对照组在整个过程中的腹泻率较高,断奶8～11 d一直维持50%～60%的腹泻率,另外腹泻延续的时间较长,断奶12～15 d仍有20%～30%的腹泻率.断奶1～10 d,试验组料重比比对照降低了12.05%(P＜0.05).断奶11～20 d,试验组日增重比对照组提高27.75%(P＜0.05),试验组采食量、料重比与对照组相近.断奶10 d,试验组血清尿素氮水平比对照组低17.36%(P＞0.05),但对血清总蛋白和血清白蛋白水平无明显影响.断奶20 d,谷氨酰胺对血清尿素氮和总蛋白有一定影响,试验组血清尿素氮水平比对照组低4.26%(P＞0.05),血清总蛋白水平比对照组高18.70%(P＞0.05),谷氨酰胺对血清白蛋白水平无明显影响.饲粮添加谷氨酰胺对T3,T4水平无明显影响,但对生长激素水平有一定的提高作用.

Sixty piglets weaned at 21 d age were randomly assigned to two groups （10 piglets per pen, 3 pens per group）. In the treaments, piglets received corn-soybean meal-based diets supplemented with 1.0% free L-glutamine. This experiment was conducted to investigate the effect of glutamine on growth performance of 21d weanling piglets. The diarrhea rate of piglets in the glutamine treatments was markedly reduced as compared to that in the control at the 9th day of the postweaning period. Compared with the glutamine groups, the control showed higher diarrhea rate and longer diarrhea period. The control piglets had 50%-60% diarrhea rate on the 8-11th day of the postweaning period and the corresponding diarrhea rate on 12 15th day being still as high as 20%-30% . During the first ten postweaning days, the feed：gain ratio of pigs supplemented with 1.0% glutarnine was 12.05%（P（ 0.05） lower than that of the control. During the second ten postweaning days, average daily gain of glutamine treatments was 27.75%（P（0. 05） higher than that of the control with, however, no effect on the feed：gain ratio and average daily feed intake. During the first ten postweaning days, the serum urea nitrogen of pigs supplemented with 1.0% glutamine was 17. 36%（P〈0.05） lower than the control. The serum analysis also showed that glutamine had no significant effect on levels of total protein, albumin, T3 , T4 and growth hormone.