数字农科院2.0

Converse effects of warming and reclamation on methane uptake in alpine meadows

文献类型： 外文期刊

作者： Jing Huang;Guozheng Hu;Hasbagan Ganjurjav;Qingzhu Gao;Yubao Sha;Zheng Li;Guoxu Ji;Huihui Liu;Ling Han;Shicheng He;Jun Yan;Youxia Wang;Wendong Xie;Elise S. Gornish

作者机构：

关键词： Alpine meadows;Cultivated grassland;Methane;Qinghai-Tibet Plateau;Reclamation;Warming

期刊名称： Global Ecology and Conservation

ISSN： 2351-9894

年卷期： 2025 年 58 卷

页码：

收录情况： SCIE（2025版）

摘要： Climate warming will lead to changes in soil properties, which in turn will affect the uptake of methane (CH4) in meadows. Currently there is artificial reclamation of alpine meadows, and the effect of reclamation on CH4 uptake in alpine meadow ecosystems is still unclear. Therefore, we investigated the effects of warming, reclamation and their interactions on soil CH4 uptake in alpine meadows on the Tibetan Plateau. From May to December 2021 and from March to May 2022, CH4 uptake was determined under four treatments: control (CK), warming, reclamation and warming under reclamation. Soil C and N nutrient contents and three enzyme activities were determined in 2021, and their effects on CH4 uptake were elucidated using the Mantel test as well as structural equation modelling. The results showed that warming significantly increased CH4 uptake by 23.84 %, reclamation significantly reduced CH4 uptake by 58.64 %, warming interacted with reclamation significantly reduced CH4 uptake by 33.45 % in growing season, and warming interacted with reclamation significantly reduced CH4 uptake by 21.46 % in the non-growing season, as compared to CK. Warming promoted CH4 uptake by increasing soil nutrient content and increasing the activities of methane monooxygenase and soil sucrase. Reclamation reduced the content of soil soluble carbon and nitrogen and inhibited the uptake of CH4. Therefore, in the context of global warming, the destruction of natural grassland should be avoided as far as possible and the area of cultivated land should be rationally planned, so as to maintain the higher CH4 uptake capacity of grassland.

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