·2,447,543篇论文数据，部分数据来源于NoteExpress
The microbial quotient increased firstly, then decreased, along with the no-tillage years increasing, which was lowest in no-tillage 10 years.
随着免耕年限延长，土壤微生物商呈先增加再降低的趋势，免耕10年以上土壤微生物商最低。
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