分析中国不同草原生长季初期土壤呼吸的空间变化。
Analysing the spatial variation of soil respiration during the early growing season of different grasslands in China.
作者信息
Liu Jie, Huang Ni, Wang Li, Lin Xiaoyu, Zhu Luying, Niu Zheng, Zhang Yuelin, Duan Wensheng
机构信息
Key Laboratory of Remote Sensing and Digital Earth, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China.
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.
出版信息
PeerJ. 2024 Nov 28;12:e18480. doi: 10.7717/peerj.18480. eCollection 2024.
BACKGROUND
As one of the most essential vegetation types, grasslands play a vital role in the global carbon cycle. However, current researches on the spatial variation (SV) of soil respiration ( ) in grasslands faces great uncertainties.
METHODS
The SV of was analysed by obtaining during the early growing season of three types of grasslands (., alpine meadow, desert steppe, and typical steppe) and related impact factors at 19 sites.
RESULTS
The results demonstrated that during the early growing season, the of the alpine meadow was the highest, followed by the typical steppe and desert steppe. Moreover, soil temperature was the primary factor affecting the SV of in desert steppe. In contrast, soil water content influenced the SV of in typical steppe. This study increases our understanding of the SV of during the early growing season of different grasslands. It provides an important reference for accurately estimating the SV of in grasslands at various time scales.
背景
作为最重要的植被类型之一，草原在全球碳循环中发挥着至关重要的作用。然而，目前关于草原土壤呼吸空间变异（SV）的研究面临很大的不确定性。
方法
通过在三种类型草原（如高山草甸、荒漠草原和典型草原）生长季早期的19个位点获取土壤呼吸及相关影响因子，分析土壤呼吸的空间变异。
结果
结果表明，在生长季早期，高山草甸的土壤呼吸最高，其次是典型草原和荒漠草原。此外，土壤温度是影响荒漠草原土壤呼吸空间变异的主要因素。相比之下，土壤含水量影响典型草原的土壤呼吸空间变异。本研究增进了我们对不同草原生长季早期土壤呼吸空间变异的理解。它为在不同时间尺度上准确估算草原土壤呼吸空间变异提供了重要参考。
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