玉米和大豆旋转有利于土壤质量和有机碳库存
Bolun Luo1, Jie Zhou1, Wei Yao1
1State Key Laboratory of Maize Bio-breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China.
Journal of environmental management
|November 16, 2024
概括
用大豆和玉米进行作物轮换可以提高土壤质量和碳储存. 增加大豆在轮换中的频率可以提高土壤生态系统的多功能性和营养素的可用性,改善土壤健康.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 生态生态学 生态生态学
背景情况:
- 促进大豆-玉米旋转,以最大限度地提高作物产量.
- 大豆种植频率对土壤质量和碳 (C) 库存的影响需要调查.
研究的目的:
- 评估不同大豆-玉米旋转频率对土壤质量和C.库存的影响.
- 确定最佳的大豆含量率,以改善土壤健康.
主要方法:
- 这是一项为期8年的实地实验,使用了四种作物系统:连续大豆 (S),连续玉米 (M),大豆-玉米旋转 (SM) 和大豆-玉米-玉米旋转 (SMM).
- 分析土壤质量指数,土壤生态系统多功能性 (EMF),C库存,酶活动和营养素的可用性.
主要成果:
- 与连续作物相比,作物轮换 (SM和SMM) 显著改善了土壤质量指数,EMF和C库存.
- 增加大豆在旋转中的频率通过刺激酶活动和可用的 (N) 来增强土壤EMF.
- 豆-玉米旋转减轻了微生物N限制,并显示了土壤质量指数和上层土壤C库存之间的正相关性.
结论:
- 与单一栽培相比,大豆-玉米旋转可以提高土壤质量和C储存.
- 在旋转中减少大豆频率 (SMM) 对土壤有机C和总N积累更有效.
- 优化大豆的种植频率对于改善农业系统中的土壤有机C是至关重要的.
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