EM堆肥对土壤生物影响的研究

长期定点施用EM堆肥试验结果表明:EM有机堆肥能提高土壤细菌、真菌、放线菌数量;相同有机物料投入水平下,EM堆肥处理的微生物总量最高;随着有机物料投入水平的降低,土壤微生物数量下降;施用EM能提高土壤微生物活性,增加微生物的分布密度。施用EM堆肥土壤蚯蚓数量均显著高于其他施肥处理。EM堆肥各处理平均土壤螨虫数量高,但在相同的有机物料投入水平下,差异不显著。在大部分作物生长期,施EM 15t/hm2处理与化肥处理和对照处理土壤生物总量差异显著。

Effect of EM compost on soil organisms

An experiment on winter wheat and summer maize with different fertilizer treatments was conducted to study the effect of Effective Microorganism(EM)compost on soil organisms.The results show that EM compost increases soil bacteria,fungi,and actinomycete counts.Total number of microbe of EM compost is highest among all the treatments with the same organic matter application.Meanwhile,EM compost enhances microbial activity and density.In EM compost plots,soil earthworm counts are significantly higher than in all other plots.Equally,the average soil mite counts in EM compost plots are higher than those in all other plots,but the count difference gets insignificant with the same levels of organic matter input.In most of the growth periods,an obvious difference of soil organism amount exists between EM compost treatment(15t/hm2) and chemical fertilizer treatment or CK treatment.EM compost improves soil productivity.