低聚木糖对保育猪生长性能、腹泻率和血清生化指标的影响

Effects of Xylo-Oligosaccharide on Growth Performance,Diarrhea Rate and Serum Biochemical Indices of Nursery Piglets

本试验旨在探讨低聚木糖对保育猪生长性能、腹泻率及血清生化指标的影响,并筛选出其最佳添加量。试验选取胎次相近、健康的(35±1)日龄"杜×长×大"仔猪72头,随机分为4组,每组3个重复,每个重复6头猪。对照组饲喂基础饲粮,试验Ⅰ、Ⅱ、Ⅲ组饲喂在基础饲粮中分别添加100、200、400 mg/kg XOS的试验饲粮,试验期为28 d。结果表明:1)试验Ⅱ组仔猪的终末体重、平均日增重(ADG)与平均日采食量(ADFI)均显著高于其他各组(P<0.05);试验Ⅰ和Ⅱ组仔猪的料重比(F/G)显著低于对照组和试验Ⅲ组(P<0.05),且以试验Ⅱ组效果最佳。2)与对照组相比,各试验组仔猪腹泻率均极显著降低(P<0.01),以试验Ⅱ组效果最佳。3)与对照组相比,各试验组血清中总蛋白(TP)、白蛋白(ALB)、球蛋白(GLB)含量及白球比(ALB/GLB)值均无显著变化(P>0.05);试验Ⅱ组血清中葡萄糖含量以及淀粉酶和碱性磷酸酶活性均显著高于对照组(P<0.05);各试验组血清中尿素氮和总胆固醇含量均显著低于对照组(P<0.05),而血清中谷丙转氨酶和谷草转氨酶活性较对照组有提高趋势,但差异不显著(P>0.05)。由此可见,饲粮添加适量XOS可以提高保育猪的生长性能,降低腹泻率,并可改善保育猪部分血清生化指标。在本试验条件下,保育猪饲粮中添加200 mg/kg XOS为最佳。

This experiment was intended to study the effects of xylo-oligosaccharide （XOS） on growth performance, diarrhea rate and serum biochemical indices of nursery piglets, and to select its optimal supplemental dose. A total of 72 healthy Duroc×Landrace×Yorkshire piglets with similar parity and aged （35±1） days were randomly assigned to 4 groups with 3 replicates per group and 6 piglets per replicate. The piglets in control group were fed a basal diet, and the piglets in test groups Ⅰ, Ⅱ, and Ⅲ were fed experimental diets which supplemented with 100, 200 and 400 mg/kg XOS in the basal diet, respectively. The experiment lasted for 28 days. The results showed as follows： 1） the final body weight, average daily gain （ADG） and average daily feed intake （ADFI） of test group Ⅱ were significantly higher than those of other groups （ P 〈0.05）; the feed/gain （F/G） of test groups Ⅰ and Ⅱ was significantly lower than that of control group and test group Ⅲ （ P 〈0.05）, and the effect of test group Ⅱ was the best. 2） Compared with control group, the diarrhea rate of piglets of test groups was significantly decreased （ P 〈0.01）, and the effect of test group Ⅱ was the best. 3） Compared with control group, the contents of serum total protein （TP）, albumin （ALB）, globulin （GLB） and ALB/GLB of test groups had no significant changes （ P 〉0.05）; the content of glucose and the activities of amylase and alkaline phosphatase in serum of test group Ⅱ were significantly higher than those of control group （ P 〈0.05）; the contents of urea nitrogen and total cholesterol in serum of test groups were significantly lower than those of control group （ P 〈0.05）, and the activities of alanine aminotransferase and aspartate aminotransferase in serum had a trend to improve, but there were no significant differences among all groups （ P 〉0.05）. Thus, the diet supplemented with appropriate amount of XOS can promote the growth performance, decrease diarrhea rate and improve serum biochemical indices of nursery piglets, and 200 mg/kg XOS is the optimal supplemental dose for nursery piglets under the experimental conditions.