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| Effects of soil disinfestation methods on nutrients and microbial community structure in different soil depths |
| Received:June 03, 2021 |
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| KeyWord:soil depth;reduction soil disinfestation;community analysis;functional prediction |
| Author Name | Affiliation | E-mail | | TAO Yu | Hunan Vegetable Research Institute, Changsha 410000, China | | | LI Xuefeng | Hunan Vegetable Research Institute, Changsha 410000, China | | | ZHANG Zhuqing | Hunan Vegetable Research Institute, Changsha 410000, China | | | ZHANG Qingzhuang | Hunan Vegetable Research Institute, Changsha 410000, China | | | LI Xin | Hunan Vegetable Research Institute, Changsha 410000, China | s2007203272@yeah.net |
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| Abstract: |
| Reductive soil disinfestation(RSD) is an effective technology for alleviating continuous cropping obstacles. Currently,there are many studies on the influence of RSD on the structure and activity of soil microbial communities. However,the effects of soil depth on soil microbial community structure and its connection to environmental factors under different RSD treatments have not been effectively investigated. This study aimed to evaluate the basic principles of RSD treatments to alleviate continuous cropping challenges,provide a basis for further research to improve soil quality,and prevent soil continuous cropping challenges by using molecular biotechnologies. This study compared the effects of different soil sterilization methods on soil nutrients and microbial communities through testing of soil physicochemical properties and high-throughput sequencing. The results showed that RSD treatments increased the nitrogen,potassium, and phosphorus contents in the soil,and promoted the transformation and accumulation of soil available nutrients such as available potassium and phosphorus. Meanwhile,association analysis revealed that soil physicochemical properties such as soil depth,total nitrogen, available phosphorus,and exchangeable magnesium combined to effect changes in the abundance of the phyla Chloroflexi,Actinobacteria,Ascomycota,Basidiomycota,and Mortierellomycota,among others. According to the association analysis of community and soil physicochemical properties,the soil depth was the primary factor influencing soil microbial community structure. Community function prediction indicated that RSD could effectively improve the bacterial abundance in shallow soils through improvement in metabolic activities such as carbohydrate;and promote colonization of soil saprophytic fungi,woody saprophytic fungi,and litter saprophytic fungi in deep soils. In summary,RSD treatments could effectively increase soil nutrients and change the structure and function of the microbial community by improving soil fertility and sustainable ecological development. |
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