青藏高原高寒草地生态系统碳平衡对放牧强度的响应
Response of Carbon Balance to Grazing Intensity in Alpine Grassland Ecosystem of the Qinghai-Tibet Plateau
李娜 1郭同庆 1张骞 1徐田伟 2徐世晓2
作者信息
- 1. 中国科学院西北高原生物研究所,青海西宁 810001;中国科学院大学,北京 100049
- 2. 中国科学院西北高原生物研究所,青海西宁 810001
- 折叠
摘要
青藏高原拥有世界上最广阔的高寒草地,以及长达数千年的悠久放牧历史.独特的高寒环境条件使这里对外界干扰更加敏感.尽管已经进行了很多青藏高原高寒草地生态系统碳平衡的相关研究,但放牧,尤其是放牧强度如何影响高寒草地碳平衡仍待进一步研究与明确.论文以围栏禁牧、轻度放牧、中度放牧、重度放牧4种放牧强度为基础,综述了青藏高原高寒草地生态系统碳平衡对不同放牧强度的响应.放牧强度变化通过干扰植物-土壤界面从而对碳输入和输出过程产生间接作用,最终影响高寒草地生态系统碳平衡.由于受到放牧历史、气候条件、草地类型等其他条件的干扰,高寒草地生态系统碳平衡对放牧强度的响应是复杂多样的,因此需要对放牧管理采取更加灵活、具体、有针对性的措施,这对于制定合理的草地管理决策、稳定青藏高原高寒草地生态系统碳平衡具有重要意义.
Abstract
The Tibetan Plateau has the world's most extensive alpine grassland and a long history of grazing that dates back thousands of years.The unique alpine environment conditions make it more sensi-tive to external disturbances.Although many studies have been conducted on the carbon cycling of alpine grassland ecosystems on the Qinghai-Tibet Plateau,how grazing,especially grazing intensity,affects the carbon balance of alpine grassland still needs further studies and clarification.This paper reviews the re-sponse of carbon balance of alpine grassland ecosystem to different grazing intensities on the Qinghai-Tibet Plateau based on four grazing intensities,namely,fence grazing,light grazing,moderate grazing and heavy grazing.The results showed that the change of grazing intensity indirectly affected the carbon input and output of alpine grassland ecosystem by disturbing the plant-soil interface,and further affected the carbon balance.Due to grazing history,climate condition,the grassland types and other interference,the response of alpine grassland ecosystem carbon balance to grazing intensity is complicated,so it is necessary to adopt more flexible,specific and targeted measures to grazing management,which is of great signifi-cance to the rational grassland management decisions,and to the stability of the Qinghai-Tibet plateau al-pine meadow carbon balance.
关键词
碳平衡/放牧强度/草地退化/土壤碳库/高寒草地生态系统Key words
carbon balance/grazing intensity/grassland degradation/soil carbon pool/alpine grass-land ecosystem引用本文复制引用
基金项目
国家重点研发计划(2021YFD1600200)
青海省自然科学基金(2019-ZJ-974Q)
第二青藏高原综合科学考察研究项目(2019QZKK040104)
中国科学院西部之光创新团队项目(CASLWC-2021)
出版年
2024
国家科技期刊平台
NSTL
万方数据