黄芩多糖对肉仔鸡营养物质消化率、生长性能的影响

Effects of polysaccharide from Scutellaria baicalensis Georgi on the nutrient digestibility and growth performence in broilers

用黄芩多糖作为饲料添加剂,研究其对内用仔鸡主要营养物质代谢率以及生长性能的影响。试验选用体重相近的AA肉仔鸡120只,随机分成4个处理,每个处理3个重复,每个重复10只。各组基础日粮相同,试验组分别在基础日粮中按100、200和400 mg/kg饲粮添加黄芩多糖;并分别在第3周龄和第5周龄各进行4 d代谢试验,在7、14、21、35和49日龄以组为单位称重、称余料,计算耗料量、日增重和料重比。分别于21、35和49日龄每组随机取3只体重接近平均体重的鸡进行屠宰,采血,制备血清,进行相关指标检测。试验结果表明,在试验添加量范围内,黄芩多糖对内仔鸡养分代谢率具有降低作用,且对0-3周龄肉仔鸡的影响要大于3-7周龄。在3-7周龄,粗蛋白代谢率最高的是200 mg/kg黄芩多糖添加组,比对照组高24.04%,差异显著(P<0.05)。200 mg/kg黄芩多糖添加组对内仔鸡体重、日增重和料肉比影响较显著。

One hundred and twenty one-day-old AA broilers were used to evaluate the effects of polysaccharide from Scutellaria baicalersis Georgi on their nutrient digestibility and growth performance. The chicks were assigned to four treatments with 30 birds in each. Treatment one were given only basal diet, others were added with the polysaccharide at a dose of 100 mg/kg, 200 mg/kg and 400 mg/kg, respectively. Metabolic test was performed for 4 days on week 3 and week 5 respectively, the feed consumption, body weight gain daily and the ratio of feed to body weight gain were measured on day 7.14,21.35 and 49. and sera samples were collected from each treatment on day 21, 35 and 49. The results indicated that the addition of 200 mg/kg could improve the nutrient digestibility and body weight gain （P〈0.05）, and hadno significantly effects on the contents of TP, GLU. Ca and P （P〉0.05）.