Effect of wormcast on phenolic acids and microbes in the Rehmannia glutinosa succession cropping soils

摘要

In this paper, different proportion of wormcast was added to the Rehmannia glutinosa continuous cropping soils including first and second stubble to adjust the phenolic acids content and microbial biomass and improve the soil environment after continuous cropping. Results showed that vanillic acid, vanillin and ferulic acid in the soils cropped Rehmannia glutinosa for one year were all somewhat decreased after a growth cycle, half a year. The ratio of fungi to bacteria was firstly increased then decreased in the soils cropped Rehmannia glutinosa for one year, while an opposite result in the second stubble soil after addition of wormcast. Taken together, the effect, 10 percent addition of wormcast to the soil cropped Rehmannia glutinosa for two years, was the best.