中文摘要：

研究了枯草芽孢杆菌（Bacillus subtilis） J-11菌剂对肉鸡肠道5种消化酶活力及生长性能的影响.选用3日龄仔肉鸡2 000只,平均随机分成两组,即对照组和添加组.添加组3～21日龄期间在基础日粮中添加0.1％J-11菌剂,对照组不添加J-11菌剂.结果表明,饲料中添加0.1％ J-11菌剂后,可使肉鸡粪便中α-淀粉酶、蛋白酶、脂肪酶和纤维素酶的平均酶活力分别提高44.02％、45.99％、58.37％和45.73％,β-葡聚糖酶的活力无显著变化;肉鸡平均日增重提高13.00％,料重比降低11.0％.停饲J-11菌剂后,添加组粪便中消化酶活力和肉鸡平均日增重等指标逐渐接近对照组.J-11菌剂具有提高肉鸡肠道多种消化酶活力,增加饲料转化率,改善肉鸡生长性能的作用.

英文摘要：

Effects of Bacillus s ubtilis J-11 preparation on five kinds of digestive enzyme activity in intestinal tract and growth performance of broiler were studied. 2000 three-day-old broilers were divided into test group （supplemented with 0.1% J-11 preparation from 3 days old to 21 days old） and control group （fed by the basal diet） on the average. The results showed that a-amylase, protease, lipease, cellulase activity in broiler manure increased by 44.02%, 45.99%, 58.37%, 45.73%, respectively, while β-gluanase activity was not different. Broiler weight increased by 13.0~/o, feed to gain ratio decreased by 11%. When J-11 preparation was stopped feeding those indices of test group were close to those of control group gradually. J-11 preparation can improve some intestinal digestive enzyme activity in intestinal tract and growth performance of broiler.