数字农科院2.0

Microecological mechanism behind the alleviation of common bean root rot disease following seven continuous cropping cycles

文献类型： 外文期刊

作者： Li Yang1;2; Adegboyega Adeniji1; Ziteng Zhou3; Gantsetseg Ganbaatar1; Xiaohong Lu1; Shidong Li1; Boming Wu2; Guangnan Zhang4; Qiwen Zhong4; Qi Wang5; Rongjun Guo1;*

关键词： continuous cropping; rhizosphere soil; standard field fertilization; common bean root rot; soil microorganism

期刊名称： Soil Ecology Letters

ISSN： 2662-2289

年卷期： 2025 年

页码：

收录情况： CSCD（2025-2026年度） ; ; 农林核心（2024版） ; ; ESCI（2025版）

摘要： Common bean root rot becomes serious in continuous cropping fields with over-application of chemical fertilizer. Through the standard field fertil- ization, the disease might be alleviated. This study aimed to investigate the impacts of standard field fertilization practices on bean root rot severity and rhizosphere microbial community shifts under continuous cropping. From 2018 to 2021, beans were monocultured for eight cycles in field soil in the greenhouse at an average interval of 4 months. Root rot severity was assessed at each cycle, and rhizosphere microbial communities were analyzed at 1st, 5th, and 7th cycles using high-throughput sequencing approach. Bean root rot severity was found to keep increasing until the 5th cycle and decreased sharply at the 7th cycle. Corresponding to the disease aggravation and suppression, Fusarium exhibited the highest abundance at the 1st cycle, followed by Plectosphaerella at the 5th cycle, and Dactylonectria at the 7th cycle. Pseudomonas showed the highest abundance in the rhizosphere soils at the 1st and 7th cropping cycles. Correlation analysis indicated that the soil microbes were closely related to disease severity as well as soil nitrogen and phosphorus contents. These findings suggest that continuous cropping of bean with standard field fertilization practices could create suppressive soil with reduced disease severity. This study revealed the microecological immune mechanism of continuous cropping of bean against root rot and provided cost-effective and highly efficient techniques for sustainable farming.

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