β-glucanase ( lichenase, E.C.3.2.1.73) is a major feed enzyme that hydrolyses only beta-1,4-linkages adjacent to beta-1,3-linkages in β-glucans, so it can alleviate the anti-nutritional effect. Most of β-glucanases are from microorganisms. β-葡聚糖酶是重要的饲用酶制剂,它能特异性地降解β-葡聚糖中与β-1,3键相邻的β-1,4键,从而可消除由β-葡聚糖引起的抗营养作用。