Effects of Pheretima sp.and Eisenia foetida on Changes in Microbial Populations of Forest Soil in Different Seasons

摘要

[Objectives]This study was conducted to investigate the effects of artificially cultured Eisenia foetida and wild earthworms ( Pheretima sp.) on the changes of microbial populations in forest soil in different seasons.[Methods]Artificially cultured E.foetida and wild earthworms were introduced to forest soil,and changes in the number of microbial populations under earthworm-microbe interaction were investigated in different seasons by tracking observation.The effects of earthworm activities on the number of different microbial populations were discussed also.[Results]Different microbial populations all increased in the soil to different degrees after the introduction of earthworms.The effects of the wild earthworms on the changes in bacteria,actinomycetes and fungi in the soil were different from those of artificially cultivated earthworms to certain degrees.[Conclusions]This study provides a theoretical basis for organic agriculture that relies on the decomposition of organic matter to release nutrients.