中文摘要：

本试验旨在研究饲粮中添加不同水平蚕沙对绵羊生长性能、屠宰性能、器官发育和血清生化指标的影响。试验选用32只90日龄绵羊,随机分成4组,每组8只。各组饲粮中蚕沙水平分别为0（对照）、20%（T20）、30%（T30）、40%（T40）。预试期15 d,正试期60 d。试验结束后每组随机选取3只羊屠宰。结果表明：1）T20和T30组的平均日增重（ADG）高于对照组（P〉0.05）,显著高于T40组（P〈0.05）,日均采食量（ADFI）显著低于对照组（P〈0.05）,料重比（F/G）低于对照组（P〉0.05）,ADFI和F/G显著低于T40组（P〈0.05）。2）T20和T30组屠宰率与对照组无显著差异（P〉0.05）,而显著大于T40组（P〈0.05）;对照组与T20、T30组胴体重差异不显著（P〉0.05）;T20、T30、T40组的眼肌面积和胴体脂肪含量值均显著大于对照组（P〈0.05）。3）T20组的心脏重量显著大于对照组（P〈0.05）,T30和T40组的脾脏重量显著大于对照组（P〈0.05）。4）对照组血清球蛋白（GLO）含量显著小于T40组（P〈0.05）。试验组血清碱性磷酸酶（ALP）活性显著低于对照组（P〈0.05）。综合以上,饲粮中添加蚕沙能够增大绵羊ADG,提高屠宰率,降低料重比,蚕沙在饲粮中的适宜比例为20%-30%,最佳比例为20%。

英文摘要：

This experiment was conducted to evaluate the effects of different silkworm excrement levels in diets on growth performance, slaughter performance, organ development and serum biochemical indexes of sheep. Thirty-two 90-day-old sheep were randomly divided into four groups with eight sheep per group. Sheep in dif-ferent groups were fed diets with 0 （ control） , 20% （ T20 ） , 30% （ T30 ） and 40% （ T40 ） silkworm excre-ment, respectively. The experiment lasted for 75 days consisted of a 15-day pre-test period and a 60-day test period. Three sheep in each group were slaughtered at end of the experiment. The results showed as follows：1） average daily gain （ADG） in T20 and T30 groups was higher than that in control group （P〉0.05）, and was significantly higher than that in T40 group （ P〈0.05）;average daily feed intake （ ADFI） in T20 and T30 groups was significantly lower than that in control group （ P〈0.05） , and feed to gain ratio （ F/G） was lower than that in control group （P〉0.05）, ADFI and F/G were significantly lower than those in T40 group （P〈0.05） . 2） Dressing percentage in T20 and T30 groups was significantly higher than that in T40 group （ P〈0.05） , and had no significant difference with that in control group （ P〉0.05）;there was no significant differ-ence in carcass weight among control, T20 and T30 groups （ P〉0.05）; eye muscle area and carcass fat con-tent value （ GR value） in T20, T30 and T40 groups were significantly higher than those in control group （ P〈0.05）. 3） Heart weight in T20 group was significantly higher than that in control group （P〈0.05）, and spleen weight in T30 and T20 groups was significantly higher than that in control group （ P〈0.05） . 4） Serum globin content in control group was significantly lower than that in T40 group （ P〈0.05） , serum alkaline phosphatase activity in experimental groups was significantly higher than that in control group （ P〈0.05） . In conclusion, di