适度放牧减少了草原草地温室气体排放量,而割草增加了草原草原的温室气体排放量:植物站立生物质发挥的关键调节功能
Hao Wang1, Yanlong Li1, Junzheng Zhang2
1Ministry of Education Collaborative Innovation Center for Grassland Ecological Security, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, China; Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, China.
Journal of environmental management
|January 17, 2025
概括
草原中适度放牧减少了温室气体 (GHG) 排放和二氧化碳排放,同时增加了甲吸收. 这种管理策略平衡了环境效益与保持草原生产率.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 气候变化 气候变化
背景情况:
- 草原是重要的陆地生态系统,影响全球温室气体 (GHG) 水平.
- 气候和土地利用变化通过影响土壤特性,显著改变草原温室气体排放.
- 最佳的草原管理需要平衡温室气体减排,生物多样性和生产力.
研究的目的:
- 调查在半干旱的草原草原中放牧和割草对温室气体排放的影响.
- 为了确定围,放牧和割草对生态系统呼吸 (CO2),甲 (CH4) 吸收和氧化 (N2O) 排放的影响.
- 为优化草原管理实践提供见解,以缓解气候变化.
主要方法:
- 在内蒙古进行了为期六年的放牧和割草实验.
- 静态室法用于测量CO2,CH4和N2O流量.
- 分析了围,放牧和割草对草原生态系统过程的影响.
主要成果:
- 温和的牧场减少了地面上的生物质和二氧化碳排放,但增强了地下的营养循环和CH4吸收.
- 割草增加了植物生物质,土壤碳和,以及二氧化碳排放.
- 减少放牧频率导致了较少的生物质损失和较低的N2O排放.
结论:
- 适度放牧是减轻温室气体排放的最有效策略,同时保持草原的生产力.
- 割草可以提高植物产量,但会增加温室气体排放,需要在管理中仔细考虑.
- 整合放牧强度和频率是优化草原管理以实现气候和生产力目标的关键.
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