Decadally cycling soil carbon is more sensitive to warming than faster-cycling soil carbon
Decadally cycling soil carbon is more sensitive to warming than faster-cycling soil carbon
复制标题
十年循环的土壤碳比快速循环的土壤碳对变暖更敏感
DOI：
10.1111/gcb.13071
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发表时间：
2015-12-01
影响因子：
11.6
通讯作者：
Cheng, Weixin
中科院分区：
文献类型：
--
作者：
Lin, Junjie;Zhu, Biao;Cheng, Weixin
土壤有机碳库对全球地表温度升高的响应决定了气候变化与全球碳循环之间的反馈关系。然而，作为土壤碳储量的主要组成部分，与全球变化关系最为密切的土壤有机碳（SOC）分解的温度敏感性研究却很少。我们解决了这个问题，使用两个十年的C-13标记的土壤和一个大大改进的测量系统在长期培养实验。结果表明，10年循环（一种土壤> 23年，另一种土壤> 55年）的土壤有机碳分解的温度敏感性显著高于快循环（
The response of soil organic carbon (SOC) pools to globally rising surface temperature crucially determines the feedback between climate change and the global carbon cycle. However, there is a lack of studies investigating the temperature sensitivity of decomposition for decadally cycling SOC which is the main component of total soil carbon stock and the most relevant to global change. We tackled this issue using two decadally C-13-labeled soils and a much improved measuring system in a long-term incubation experiment. Results indicated that the temperature sensitivity of decomposition for decadally cycling SOC (>23years in one soil and >55years in the other soil) was significantly greater than that for faster-cycling SOC (