Many studies have shown that lignin was the limited factor of straw degradation . in this study we screened a strain named b3 from the stem ' s inner bark of bischofia polycarpam airy shaw which yielded high level of ligninase . the strain b3 ' s ability in straw degradation and its effect on the next season crop ' s growth were then studied by making it into microbial agent in the potted experiment 鉴于此，本论文即从筛选高产木质素酶的菌株入手，结果从重阳木茎内皮中筛选到一株有较高漆酶(木质素酶之一)活性的菌株b3 ，并将其制成秸秆降解剂，模拟大田试验研究了它对秸秆的降解效果及对后季作物生长的影响。
