摘要目的探索常见4种微生态制剂菌种地衣芽胞杆菌、枯草芽胞杆菌、蜡样芽胞杆菌和纳豆芽胞杆菌产生淀粉酶的能力，以筛选和研制动物微生态制剂和饲料添加剂的使用菌种。

• Objective In order to look for the effective microecological bacteria for the different microbial preparation and feed additive, we investigated the differences of amylase between Bacillus Licheniformis, Bacillus subtilis, Bacillus Cereus, and Bacillus natto.