不同功能性氨基酸对断奶仔猪生长性能和氧化应激的影响

Effects of Different Functional Amino Acids on Growth Performance and Oxidative Stress of Weaned Piglets

为探究不同功能性氨基酸对断奶仔猪生长性能和部分血液抗氧化指标的影响,试验选用35日龄左右健康状况良好、体重接近的杜×长×大断奶仔猪400头,随机分为5个处理组,对照组饲喂基础日粮,试验组分别在基础日粮中额外添加0.6%精氨酸、0.8%的谷氨酰胺、0.3%色氨酸和0.6%蛋氨酸,测定生长性能指标和血清抗氧化指标。结果表明:与对照组相比,添加0.6%精氨酸、0.8%谷氨酰胺、0.3%色氨酸和0.6%蛋氨酸可提升5%以上的平均日增重并降低料重比,且存在显著差异(P<0.05);色氨酸组腹泻率最低,为2.8%,差异显著(P<0.05)。各试验组超氧化物歧化酶(SOD)活性较对照组均有显著提升(P<0.05),总抗氧化能力(T-AOC)也有提升,但差异不显著(P>0.05)。综上所述,饲料中添加不同功能性氨基酸可降低断奶仔猪腹泻率,提高生长性能,对断奶仔猪抗氧化应激能力有一定的调控效果。

In order to explore the effects of different functional amino acids on growth performance and partial blood antioxidant indexes of weaned piglets,a total of 400 heads of weaned piglets which were in good health and had similar body weight were randomly divided into five treatment groups,the control group was fed with basal diet,the experimental groups were fed with basal diet supplemented with 0.6%arginine,0.8%glutamine,0.3%tryptophan and 0.6%methionine,respectively.Then the growth performance indexes and serum antioxidant indexes were measured.The results showed that compared with the control group,adding 0.6%arginine,0.8%glutamine,0.3%tryptophan and 0.6%methionine could increase daily weight gain and feed to weight ratio by more than 5%,and there were significant differences(P<0.05).At the same time,the lowest diarrhea rate in tryptophan group was 2.8%with significant difference(P<0.05).The superoxide dismutase(SOD)activity of each experimental group was significantly increased compared to the control group(P<0.05).The total antioxidant capacity(T-AOC)was also improved,but the difference was not significant(P>0.05).In summary,adding different functional amino acids to feed could reduce the diarrhea rate of weaned piglets,improve growth performance,and have a positive regulatory effect on the antioxidant stress capacity of weaned piglets.