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对水稻土微生物群落在不同粒级土壤团聚体中的分布以及耕作的影响,结果表明:细菌和真菌主要分布在粒级<0.053 mm的粉砂与粘粒组分中,而在各粒级团聚体中的分布无显著差异.放线菌主要分布在粒级为0.053~0.2 mm的土壤微小团聚体中,在其它各粒级团聚体中的分布无显著差异.研究认为水稻土微生物群落在土壤团聚体中的数量分布受土壤团聚体结构的影响.细菌、真菌、放线菌都主要分布于小粒级的土壤组分中.垄作免耕稻田显著提高了耕层土壤微生物的数量,但对微生物的分布模式没有影响.
The results showed that the distribution of bacteria and fungi was mainly in the silt and clay fractions with the grain size <0.053 mm, while the grain size was higher at each grain size of the aggregates The distribution of actinomycetes in soil was not significantly different.The distribution of actinomycetes was mainly in the soil aggregates with the size of 0.053-0.2 mm and there was no significant difference in the distribution of other aggregates.It was concluded that the microbial community in paddy soil was in the soil The distribution of the number of aggregates was affected by the structure of soil aggregates. Bacteria, fungi and actinomycetes were mainly distributed in the soil fractions of small size. Ridge-tillage and no-tillage rice fields significantly increased the amount of soil microbes in the topsoil, The distribution pattern has no effect.