在米-小麦旋转过程中平衡碳捕获,排放和产量的化肥实践:元分析
Yutao Wang1, Guang Han2, Hang Shi1
1College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.
Journal of environmental management
|November 25, 2025
概括
综合无机有机肥料提高了米-小麦产量和土壤有机碳 (SOC) 封存. 这种做法为农业温室气体减排提供了一个可持续的途径,平衡生产力和环境健康.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 环境科学 环境科学
背景情况:
- 在大米-小麦系统中进行密集化施肥可以提高生产率,但也引起了对气候缓解和土壤健康的担忧.
- 了解施肥实践,土壤有机碳 (SOC) 封存,温室气体 (GHG) 排放和作物产量之间的权衡至关重要.
研究的目的:
- 评估不同施肥实践对SOC封存,温室气体排放和在米-小麦轮换中的作物产量的影响.
- 确定最佳的施肥策略,以平衡农业生产率,气候变化减缓和土壤健康.
主要方法:
- 编制和分析了来自中国38个长期实地试验的3171个观察结果.
- 利用多层混合效应元分析和非线性回归来评估无机 (IF),有机 (OF) 和集成 (IF + OF) 肥料的影响.
- 计算净全球变暖潜力 (NGWP) 和温室气体强度 (GHGI) 以确定最佳配置.
主要成果:
- 与单独使用IF或OF相比,集成IF+OF应用显著提高了SOC含量 (0.84g/kg-1yr-1),提高了产量 (45.8%的米,83.91%的小麦).
- 长期 (49.25年) 的IF+OF应用导致SOC持续增加2.05%,这表明碳捕获潜力显著.
- 虽然IF + OF最初由于CH4排放增加了NGWP,但由于SOC封存抵消,GHGI在100年内与IF趋同.
结论:
- 综合无机有机化肥是一种有前途的战略,用于提高米-小麦系统中的SOC封存和作物产量.
- 最佳做法包括特定的应用率和分割应用,结合有机化肥或草回收,以平衡产量和排放.
- 长期 (>20年) 采用IF+OF实践,可以支持碳捕获,减少碳排放而不影响生产力,提供可行的低碳农业战略.
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