绿色肥料与草回收相结合,通过降低原始效应和增强微生物碳来增加土壤有机碳
Guopeng Zhou1, Guilong Li2, Hai Liang3
1College of Resources and Environment, Anhui Agricultural University, Hefei, China.
Global change biology
|May 7, 2025
概括
结合绿色肥料和大米草的回归,可以显著提高土壤有机碳的捕获. 这种方法通过减少原生碳损失和通过微生物活动促进新碳的形成来增强土壤碳库存.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 绿色化肥和作物草返回是增加土壤有机碳 (SOC) 捕获的常见做法.
- 然而,驱动本地SOC矿化和在这些做法下形成新的SOC的精确机制尚未完全理解.
研究的目的:
- 评估绿色肥料 (Mv),大米回收 (Rs) 和它们的组合 (MR) 的土壤碳捕集效率 (CSE).
- 在这些农业实践下调查SOC矿化和形成的途径和微生物驱动因素.
主要方法:
- 在中国南部的一项10个地点的网络实地实验中,评估了Mv,Rs和MR对SOC库存的影响.
- 随后的微观宇宙实验追踪了碳的命运,并确定了参与SOC动态的微生物参与者.
主要成果:
- 合并的MR实践产生了最高的年度SOC库存增加 (830.2公斤C ha-1) 和CSE (23.1%),超过Mv (119.7公斤C ha-1,13.3%CSE) 和Rs (477.0公斤C ha-1,17.7%CSE) 个别.
- 通过最大限度地减少本地SOC矿化 (积极的原始效应,PE),并通过微生物碳 (MCP) 最大限度地形成新的SOC,MR实现了高CSE.
- 调节了MR的微生物群落,降低了K-战略者,以减少反抗性SOC的矿化,并促进了r-战略者和模具,以增强细菌和真菌MCP.
结论:
- 混合高质量的绿色肥料和低质量的作物草是一种优秀的策略,用于在田中有效地封存SOC.
- 这项研究确定了关键的微生物参与者,包括特定的细菌和真菌群体,它们在联合废物管理下调节SOC矿化和形成.
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