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Role of ambient climate in the response of soil respiration to different grassland management measures

文献类型： 外文期刊

作者： Qin, Shuqi 1 ; Peng, Qin 1 ; Dong, Yunshe 1 ; Qi, Yuchun 1 ; Li, Zhaolin 1 ; Guo, Yu 1 ; Liu, Xingren 3 ; Xiao, Shengsheng 4 ; Liu, Xinchao 5 ; Jia, Junqiang 6 ; He, Yunlong 7 ; Yan, Zhongqing 8 ;

作者机构： 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China

2.Univ Chinese Acad Sci, Beijing, Peoples R China

3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China

4.Jiangxi Prov Acad Water Resources Sci, Jiangxi Prov Key Lab Soil Eros & Prevent & Control, Nanchang, Jiangxi, Peoples R China

5.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot, Peoples R China

6.XingTai Univ, Xingtai, Hebei, Peoples R China

7.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China

8.Chinese Acad Forestry, Inst Ecol Conservat & Restorat, Wetland Res Ctr, Beijing, Peoples R China

关键词： Human activities; Temperate steppe; Carbon cycle; Non-growing season; Precipitation

期刊名称：AGRICULTURAL AND FOREST METEOROLOGY （ 影响因子：6.2； 五年影响因子：6.9 ）

ISSN： 0168-1923

年卷期： 2023 年 334 卷

页码：

收录情况： SCI

摘要： Assessment of the effects of enclosure and grazing on soil respiration based on long-term continuous field ob-servations is scarce, and seasonal dynamics of the dependence of soil respiration on hydrothermal factors (soil moisture and temperature) and the regulation of soil respiration by ambient climate (precipitation and air temperature) under long-term fencing and grazing have been inconclusive so far. A 14-year continuous field observation experiment was conducted in a temperate grassland in China. Our results showed that grazing decreased the average soil respiration over the whole year and growing season by 19.52% and 21.90%, respectively. Furthermore, grazing increased the dependence of soil respiration on soil moisture on an annual timescale but decreased the dependence of soil respiration on temperature during the growing season. Ambient climate determined the direction of interannual variation of soil respiration, while grassland management measures changed the effect size of ambient climate on soil respiration. This highlights that ambient climate plays a decisive role in regulating the response of soil respiration to change in grassland management measures.

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