Biochar-stimulated continuous monoculture by mediating microbial community and its metabolic characteristics
Biochar amendment has been extensively used to improve soil quality,improve plant performance and suppress disease in monoculture system,however less studies focused on the underlying mechanisms of the replanting disease control.We assessed the effects of applied biochar on Radix pseudostellariae plant growth,rhizosphere soil microbial communities,and the physiological properties of microorganism in consecutively monoculture system.We found biochar addition had little impact on plant physiological parameters,but biochar significantly mediated microbial abundances in the rhizosphere soil of differently consecutive monoculture years,especially decreased the abundances of pathogenic Fusarium oxysporum,Talaromyces helicus and Kosakonia sacchari.Furthermore,biochar amendment has negative effects on the growth of beneficial bacteria,such as Burkholderia ambifaria,Pseudomonas chlororaphis and Bacillus pumilus.Analysis based on the metabolites and metabolome indicated that biochar significantly affect the metabolism process of F.oxysporum,and then inhibit the mycelium growth and abate the virulence on plants.This study explains the mechanisms behind the biochar effect by changing the abundances and metabolism of rhizosphere bacteria and fungi,decreasing the contents of pathogens,and hence improving the environmental conditions for plants growth.
Plant-microbe interactions Replanting disease Non-invasive micro-test technique Allelopathic Consecutive monoculture
吴红淼 林文雄
福建省农业生态过程与安全监控中重点实验室,福建农林大学,福州,350002 作物生态与分子生理学福建省高校重点实验室,福州,350002
国内会议
厦门
英文
1-22
2018-10-23（万方平台首次上网日期，不代表论文的发表时间）