土壤中生活着大量的微生物,一克耕地土壤可能含有一百万到一千万以上的微生物个体。这样大量的微生物,其生命活动必然对土壤的物理或化学环境产生巨大影响。在免耕或少耕的土壤管理体系下,微生物生活的环境,显然不同子传统耕作法。免耕生态系统中,土壤未受搅动,类似天然草地,而传统耕作系统中,耕层土壤有机质受到强烈氧化分解。 There are a large number of microorganisms in the soil. One gram of cultivated soil may contain 1 million to over 10 million microorganisms. Such a large number of microorganisms, their life activities must have a huge impact on the physical or chemical environment of the soil. Under no-till or tillage soil management systems, the environment in which microbes live is clearly different from the sub-traditional farming practices. In no-till ecosystems, the soil is not agitated, resembling natural grassland, whereas in traditional farming systems, the organic matter in the topsoil is strongly oxidatively decomposed.