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Chili Pepper-Rice Rotation Alleviates Continuous-Cropping Constraints by Improving Nutrient Availability and
Rong Li1,2,3, Ge Bai1,2,3, Saifei Fan1,2,3
1College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Plants (Basel, Switzerland)
|February 13, 2026
Summary
Chili pepper-rice rotation (RVR) boosts crop yield and health by improving soil nutrients and suppressing pathogens. This sustainable practice alleviates continuous cropping issues, enhancing chili pepper cultivation.
Area of Science:
- Agricultural Science
- Soil Microbiology
- Plant Pathology
Background:
- Continuous cropping of chili pepper (Capsicum annuum L.) leads to soil degradation, microbial imbalance, and increased disease incidence, reducing yield.
- Crop rotation, specifically incorporating rice (Oryza sativa L.), is a viable strategy to mitigate these continuous cropping obstacles.
Purpose of the Study:
- To evaluate the effects of a chili pepper-rice rotation (RVR) system on chili pepper yield, disease occurrence, soil properties, and rhizosphere microbial communities.
- To elucidate the underlying mechanisms by which RVR alleviates continuous cropping obstacles in chili pepper cultivation.
Main Methods:
- A two-year field experiment (2023-2024) comparing chili pepper-rice rotation (RVR) with chili continuous cropping (CCV).
- Systematic analysis of chili pepper yield, disease incidence (bacterial wilt, root rot), soil physicochemical properties, and rhizosphere microbial community composition.
- Utilized random forest and correlation analyses to identify key factors influencing yield formation.
Main Results:
- RVR significantly reduced bacterial wilt and root rot incidence, increasing chili pepper yield by 10.60% (2023) and 61.07% (2024) compared to CCV.
- RVR promoted soil nutrient accumulation (available N, P, K) and enhanced nutrient-acquisition enzyme activity, alleviating microbial carbon and phosphorus limitations.
- RVR decreased pathogen abundance (e.g., Ralstonia, Fusarium), increased microbial network modularity, and strengthened negative pathogen cohesion, inhibiting pathogen spread.
Conclusions:
- Chili pepper-rice rotation effectively alleviates continuous cropping obstacles by enhancing soil nutrient supply and regulating rhizosphere microbial community structure and function.
- RVR optimizes fungal metabolic pathways, contributing significantly to yield formation and promoting sustainable chili pepper cultivation.
- This study provides a theoretical foundation for biological and soil management strategies to overcome pepper continuous cropping challenges.
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