黄芪多糖对断奶仔猪生长性能、表观消化率及血清氨基酸浓度的影响

Effects of Astragalus polysaccharide on growth performance,apparent digestibility and serum amino acid concentration of weaned piglets

文章旨在研究黄芪多糖对断奶仔猪生长性能、营养物质表观消化率和血清氨基酸水平的影响,试验将80头断奶仔猪随机分为4组,每组4个重复,每个重复5头猪。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加0.1%、0.2%和0.3%黄芪多糖,试验期为30 d。结果显示,0.2%和0.3%黄芪多糖可显著提高仔猪平均日增重和平均日采食量(P<0.05),仔猪腹泻率较对照组显著降低(P<0.01)。0.2%黄芪多糖可显著提高粗蛋白质的表观消化率(P<0.05);干物质、粗脂肪和粗纤维的表观消化率各组间差异不显著(P>0.05)。0.2%黄芪多糖可显著提高仔猪血清精氨酸浓度(P<0.05);0.2%和0.3%黄芪多糖组仔猪血清谷氨酸含量极显著升高(P<0.01),血清蛋氨酸含量显著降低(P<0.05)。结果表明,饲粮中添加0.2%黄芪多糖能显著提高仔猪平均日增重和平均日采食量;增加仔猪粗蛋白质表观消化率;提高血清精氨酸和谷氨酸水平,降低血清蛋氨酸浓度和仔猪腹泻率。

In order to investigate the effects of Astragalus polysaccharide(APS)on growth performance,nutrient apparent digestibility and serum amino acid levels of weaned piglets.Eighty weaned piglets were randomly divided into 4 groups with 4 replicates per group and 5 pigs per replicate.Piglets in the control group were fed a basal diet,and those in the experimental groups were fed the basal diet supplemented with 0.1%,0.2%and 0.3%APS,respectively.The experiment lasted for 30 days.The results showed that 0.2%and 0.3%APS significantly increased average daily gain and average daily feed intake of piglets(P<0.05),and diarrhea rate of piglets was significantly decreased compared with the control group(P<0.01).0.2%APS significantly increased the apparent digestibility of crude protein(P<0.05);There were no significant differences in the apparent digestibility of dry matter,ether extract and fiber among all groups(P>0.05).0.2%APS significantly increased serum arginine concentration of piglets(P<0.05);The serum glutamate content of piglets in 0.2%and 0.3%APS groups was extremely significantly increased(P<0.01),and the serum methionine content was significantly decreased(P<0.05).The results suggested that dietary supplemented with 0.2%APS could significantly increase average daily gain and average daily feed intake of piglets,increase crude protein apparent digestibility of piglets,increase serum arginine and glutamic acid levels,and decrease serum methionine concentration and diarrhea rate of piglets.