【摘要】 本文通过对使用不同年限“丰产沟”土壤微生物数量，种类分布等特性的分析研究．结果表明：“丰产沟”土壤随着使用年限的延长，微生物数量、类群将明显增加，对土壤微生物生态环境有良好影响。从而间接说明“丰产沟”对土壤改良，培肥地力将有明显效果，宜大力推广。更多还原

【Abstract】 The results from determining microbiological characteristics of getting bumper crops gully of different years showed that the quatily of all kinds of microorganism and their aetivities enhanced with times increase of croping change. This illustrates that getting bumper crops gully not only can raise crop production. Through water keeping in first year, but has better efficacy of increasing fertility.更多还原