您好，欢迎访问西藏自治区农牧科学院 机构知识库！

Contrasting impacts of grassland restoration methods on soil greenhouse gases emissions under warming conditions in Northern Tibet

文献类型： 外文期刊

作者： Shi, Hao 1 ; Xia, Fei 2 ; Ran, Lin-ling 1 ; Wu, Hao-yang 1 ; Wang, Jun-qiang 1 ; Xue, Yun-yin 5 ; Wei, Wei 2 ; Zheng, Shai-kun 4 ; Yan, Shuang 1 ; Yang, Cai-hong 4 ; Zhang, Yu 1 ; Qiu, Xiao-qin 1 ;

作者机构： 1.China West Normal Univ, Minist Educ, Key Lab Southwest China Wildlife Resource Conserva, Nanchong 637009, Peoples R China

2.State Key Lab Highland Barley & Yak Germplasm Reso, Lhasa 850000, Peoples R China

3.Tibet Acad Agr & Anim Husb Sci, Inst Pratacultural Sci, Lhasa 850000, Peoples R China

4.Gansu Agr Univ, Coll Forestry, Lanzhou 730070, Peoples R China

5.Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Peoples R China

关键词： Qinghai-Tibet Plateau; Alpine grassland restoration; Open top chamber; Greenhouse gases; Global warming potential

期刊名称：CATENA （ 影响因子：5.7； 五年影响因子：6.3 ）

ISSN： 0341-8162

年卷期： 2025 年 258 卷

页码：

收录情况： SCI

摘要： In the context of climate warming, grassland restoration on Qinghai-Tibet Plateau (QTP) may have a significant impact on greenhouse gases (GHGs) emissions. However, the response of GHGs emissions, global warming potential (GWP) and temperature sensitivity coefficient (Q10) from different restored grasslands on QTP to warming remains unclear. We adopted three restoration methods: natural-restoration (NR), no-till-replanting (S), and tillreplanting (TS), using natural-degradation grassland (ND) as a control and an open top chamber (OTC) as a simulated warming (Ws) device to clarify the response mechanism of GHGs emissions to warming, and then we evaluated the GWP and Q10 of restored grasslands on the QTP. Under Wns conditions, S resulted in the lowest GHGs emissions (by 66.22 %) and the lowest GWP related to ND. Under Ws conditions, TS suppressed the emissions of CO2 (by 23.43 %) and CH4 (by 46.34 %), maintaining the lowest N2O increment and significantly reducing GWP compared to Wns (by 23.73 %). Under the Wns and Ws conditions, the contribution rate of CO2 to GWP exceeded 93 % in all treatments, and Ws led to a decrease in the Q10 of GHGs. Structural equation model analysis showed that Ws and grassland restoration directly affected ROC, DOC, MBC and above-ground biomass (AGB), which in turn affected GWP. In summary, S effectively reduced GWP under Wns conditions, and GWP of TS was effectively alleviated under Ws conditions. Labile organic carbon and AGB are the preferred triggering factor for GWP under the conditions of Ws and grassland restoration. Our study offers a theoretical foundation and technical framework for advancing our comprehension of degraded grassland restoration and its implications for greenhouse gas dynamics on the QTP under climate warming scenarios.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：西藏自治区农牧科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台