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| DOI | 10.1111/gcb.17213 |
| Significant accrual of soil organic carbon through long-term rice cultivation in paddy fields in China | |
| 发表日期 | 2024 |
| ISSN | 1354-1013 |
| EISSN | 1365-2486 |
| 起始页码 | 30 |
| 结束页码 | 3 |
| 卷号 | 30期号:3 |
| 英文摘要 | Paddy fields serve as significant reservoirs of soil organic carbon (SOC) and their potential for terrestrial carbon (C) sequestration is closely associated with changes in SOC pools. However, there has been a dearth of comprehensive studies quantifying changes in SOC pools following extended periods of rice cultivation across a broad geographical scale. Using 104 rice paddy sampling sites that have been in continuous cultivation since the 1980s across China, we studied the changes in topsoil (0-20 cm) labile organic C (LOC I), semi-labile organic C (LOC II), recalcitrant organic C (ROC), and total SOC. We found a substantial increase in both the content (48%) and density (39%) of total SOC within China's paddy fields between the 1980s to the 2010s. Intriguingly, the rate of increase in content and density of ROC exceeded that of LOC (I and II). Using a structural equation model, we revealed that changes in the content and density of total SOC were mainly driven by corresponding shifts in ROC, which are influenced both directly and indirectly by climatic and soil physicochemical factors; in particular temperature, precipitation, phosphorous (P) and clay content. We also showed that the delta C-13(LOC) were greater than delta C-13(ROC), independent of the rice cropping region, and that there was a significant positive correlation between delta C-13(SOC) and delta C-13(straw). The delta C-13(LOC) and delta C-13(SOC) showed significantly negative correlation with soil total Si, suggesting that soil Si plays a part in the allocation of C into different SOC pools, and its turnover or stabilization. Our study underscores that the global C sequestration of the paddy fields mainly stems from the substantial increase in ROC pool. |
| 英文关键词 | global climate change; labile organic carbon; recalcitrant organic carbon; soil organic carbon pools; sulfuric acid hydrolysis; delta C-13 |
| 语种 | 英语 |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| WOS记录号 | WOS:001180067500001 |
| 来源期刊 | GLOBAL CHANGE BIOLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/303438 |
| 作者单位 | Guizhou University; Guizhou University; Tianjin University; NSW Department of Primary Industries; Foshan University; University of Wisconsin System; University of Wisconsin Milwaukee; Chinese Academy of Sciences; Institute of Earth Environment, CAS; Aarhus University; Zhejiang University; Tianjin Normal University; Sun Yat Sen University; Fujian Normal University; Henan Academy of Sciences; Chinese Academy of Sciences; Nanjing Institute of Soil Science, CAS; Tianjin University |
| 推荐引用方式 GB/T 7714 | . Significant accrual of soil organic carbon through long-term rice cultivation in paddy fields in China[J],2024,30(3). |
| APA | (2024).Significant accrual of soil organic carbon through long-term rice cultivation in paddy fields in China.GLOBAL CHANGE BIOLOGY,30(3). |
| MLA | "Significant accrual of soil organic carbon through long-term rice cultivation in paddy fields in China".GLOBAL CHANGE BIOLOGY 30.3(2024). |
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