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| Effects of S-metolachlor and its auxiliary on the rhizosphere microorganisms of crop |
| Received:January 05, 2025 |
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| KeyWord:S-metolachlor;silicone additives;Vigna angularis;inter-root microorganisms;16S rRNA |
| Author Name | Affiliation | E-mail | | YANG Chaoming | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | YU Xin | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | CHENG Honger | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | MI Changhong | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Forensic Center of Agro-Ecological Environment and Agro-Product Quality Safety, Tianjin 300191, China | | | WANG Wei | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Forensic Center of Agro-Ecological Environment and Agro-Product Quality Safety, Tianjin 300191, China | | | ZHAO Qian | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Forensic Center of Agro-Ecological Environment and Agro-Product Quality Safety, Tianjin 300191, China | zhaoqian01@caas.cn |
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| Abstract: |
| The aim of this study was to investigate the effects of S-metolachlor（S-ME）and its additives on the inter-root microbial community of red bean（Vigna angularis）. In this study, six treatments were designed, including the application of the chloroacetanilide herbicide S-ME at the agriculturally permitted concentration of 50 mL · hm-2 and the organosilicon additive cetylheptasiloxane at concentrations of 0.25% and 0.5%. The structure and diversity of the rhizosphere microbial community of red bean were analyzed using 16S rRNA sequencing technology to explore the effects of S-ME on the root microbial community in the presence of the additive. The results demonstrated that different application methods of S-ME and organosilicon additives significantly influenced the diversity of the rhizosphere microbial community in red bean. The sole application of S-ME led to a reduction in microbial diversity, particularly a significant decline in the abundance of beneficial microorganisms such as Acidobacteria（RB41）. In contrast, the co-application with additives mitigated this inhibitory effect and promoted the growth of microorganisms such as Sphingomonas and Gaiella. Furthermore, the 0.5% organosilicon additive treatment significantly increased the abundance of Blastococcus and Stenotrophomonas, optimizing microbial community diversity. Co-occurrence network analysis also reflected the synergistic promotion effect of the additives. The study revealed that additives effectively alleviated the toxic effects of herbicides on rhizosphere microorganisms by regulating the rhizosphere microenvironment and promoting the growth of beneficial microorganisms. This research contributes to a deeper understanding of the regulatory mechanisms of additives on S-ME-induced changes in the rhizosphere microbial community of red bean, providing support for the rational application of herbicides and their additives in agricultural production. |
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