温和的牧场增加了欧亚草原草原生态系统中植物和土壤的碳,和储存
Miao Wang1, Chu Zhang2, Sisi Chen2
1State Key Laboratory of Efficient Utilization of Arid and Semiarid Arable Land in Northern China/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12, Zhonguancun South Street, Haidian District, Beijing 100081, China; Beijing Digital Agriculture Rural Promotion Center, Building 3, No. 7 Beisha Beach, Chaoyang District, Beijing 100083, China.
牧场影响草原的碳 (C), (N) 和 (P) 循环. 在0.34AU/ha的温和放牧增加了土壤的C,N和P储存,这对生态系统健康和可持续发展至关重要.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 草原生态系统在营养循环中发挥着至关重要的作用,特别是碳 (C), (N) 和 (P).
- 放牧对内蒙古草原这些营养循环的影响仍然复杂,需要进一步调查.
研究的目的:
- 评估不同牧场强度对不同生态系统区 (树冠生物质,根,垃圾,土壤) 中的C,N和P储存的影响.
- 在不同的牧场压力下,研究营养池及其调节途径之间的关系.
主要方法:
- 一个为期3年的实地控制实验 (2019-2021) 在内蒙古的Hulun Buir草原草的牛放牧实验平台上进行.
- 应用了六种不同的放牧强度,以评估它们对C,N和P储量的影响.
- 结构方程建模用于分析放牧,土壤特性,生物质和营养储存之间的关系.
主要成果:
- 放牧通常增加了地面上的N和P含量,但降低了地面生物质的C含量和生物质,根和垃圾中的营养储存.
- 牧草强度为0.34AU/ha显著增强了土壤有机碳,总和总的储存,土壤占总储量的98%.
- 放牧影响了土壤的pH值,营养含量,生物质和土壤散装密度,这随后影响了C,N和P的储存.
结论:
- 牧草强度是草原生态系统中营养投入和输出的关键调节者.
- 适度的牧场可以有效地增加草原草原生态系统中的C,N和P储存.
- 实施适度放牧战略对于确保营养平衡和促进长期可持续的草原开发至关重要.
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