Effects of Trichoderma straw degradation solution on soil ecological struc-ture of watermelon continuous cropping

JIA Yunhe; WANG Xiqing; YAN Wen; FU Yongkai; YOU Haibo; WANG Lidong; LIU Xiaofei; LIU Chao

doi:10.16861/j.cnki.zggc.2025.0028

Abstract：To explore the soil improvement methods for continuous watermelon cropping,the soil for continuous water-melon cropping was treated with actinomycetes straw degradation solution.Four treatments,namely CK,straw(J),acti-nomycetes(F),and straw+actinomycetes(JF),were set up.The effects of different treatments on soil chemical proper-ties,enzyme activities,microbial content,and the growth and development of watermelon seedlings were determined and analyzed.High-throughput sequencing was conducted on different treated soils to study the changes in their microbial community structure.The results showed that compared with CK,the pH,organic matter content,REDOX enzyme(ure-ase,invertase,catalase)activity and bacterial count of the soil treated with JF were significantly increased,while the fun-gal count was significantly decreased.Compared with CK,treatments J,F and JF significantly enhanced the richness of soil microbial communities,and the differentiation of fungal and bacterial communities in the four treatments was relatively obvious.Compared with the CK,J and F treatments,the JF treatment significantly increased the strong seedling index of watermelon seedlings.It is speculated that Cladosporium,Trichoderma,Bacillus and actinomycetes work together to improve the soil ecological structure of watermelon continuous cropping.The research results provide theoretical basis and practical support for soil improvement in continuous watermelon cropping and the healthy and sustainable develop-ment of the watermelon industry.