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[Effects of Continuous Annual Crop Rotation and Fallow on Soil Aggregate Stability and Organic Carbon]
Ze-Rang Lu1, Yong-Mei Li1, Chun-Huai Yang1
11. College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China.
Huan Jing Ke Xue= Huanjing Kexue
|March 12, 2024
Summary
Continuous crop rotation and fallow practices significantly enhance soil aggregate stability and organic carbon in red soils. These methods improve soil structure, crucial for erosion control on sloping farmlands.
Area of Science:
- Soil Science
- Agronomy
- Environmental Science
Context:
- Red soils in sloping farmlands are prone to degradation.
- Understanding the impact of agricultural practices on soil health is critical.
Purpose:
- To investigate the effects of continuous annual crop rotation and fallow on aggregate stability and soil organic carbon (SOC) content.
- To analyze the relationships between aggregate stability and SOC content under different treatments.
Summary:
- Crop rotation (maize-vetch-maize, maize-pea-maize) and fallow treatments (maize-fallow-maize, annual fallow) were compared over three years.
- Annual fallow and maize-vetch-maize rotations significantly increased macro-aggregate content (> 2 mm) and aggregate stability parameters (MWD, GMD).
- Both green manure rotation and fallow increased SOC content, with the highest increases observed under annual fallow and maize-vetch-maize treatments over time.
Impact:
- Continuous crop rotation and fallow practices are beneficial for improving soil macro-aggregate content, aggregate stability, and SOC content.
- Findings provide a theoretical basis for implementing sustainable crop rotation and fallow systems for soil erosion control in red soil areas.
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