Does terracing enhance soil organic carbon sequestration? A national-scale data analysis in China
文献类型：期刊论文
| 作者 | Chen, Die; Wei, Wei ; Daryanto, Stefani; Tarolli, Paolo
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020-06-15 |
| 卷号 | 721页码:1-7 |
| 关键词 | Terrace Carbon sequestration Land use China Meta-analysis |
| ISSN号 | 0048-9697 |
| 英文摘要 | Terracing practice is expected to reserve soil organic carbon (SOC) pools, which are the key components for maintaining soil fertility and land productivity. In China such practice is widespread from center to south since ancient time. In this work, to reveal the spatial-temporal variation characteristics of SOC under different terraced sites in China, we conducted ameta-analysis on 78 studies regarding terracing effects on SOC sequestration. The between-group heterogeneity analysis indicated that terracing land use, age, climatic background, and slope gradient were critical factors for SOC sequestration, while terracing structure and soil depth were not. Overall, for China's landscapes, terracing increased SOC sequestration by 32.4% on average. Relative to other terracing structures, level ditches and half-moon terraces receive more rainwater and fertile topsoil from upper slopes due to their specific concave structures. Terracing in those areas with lower temperatures and less precipitation showed higher SOC sequestration. The extent of SOC sequestration due to terracing was primarily determined by land use type. Reforestation terraces could increase SOC sequestration markedly by eliminating water erosion and related soil carbon loss. The terracing aged 1-2 years leads to a decrease of 6.4% averagely on SOC sequestration, likely because the breakdown of soil aggregates through soil excavation and redistribution improves the decomposition of SOC. Furthermore, terracing aged over five years was more effective on SOC sequestration. Since this study offered a useful synthesis on multiple terracing factors affecting soil carbon in China, it can help to provide a wiser utilization and management of terracing to maximize SOC sequestration, and to make better terracing practices in the context of global change. (C) 2020 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44264]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chen, Die,Wei, Wei,Daryanto, Stefani,et al. Does terracing enhance soil organic carbon sequestration? A national-scale data analysis in China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,721:1-7. |
| APA | Chen, Die,Wei, Wei,Daryanto, Stefani,&Tarolli, Paolo.(2020).Does terracing enhance soil organic carbon sequestration? A national-scale data analysis in China.SCIENCE OF THE TOTAL ENVIRONMENT,721,1-7. |
| MLA | Chen, Die,et al."Does terracing enhance soil organic carbon sequestration? A national-scale data analysis in China".SCIENCE OF THE TOTAL ENVIRONMENT 721(2020):1-7. |
入库方式： OAI收割
来源：生态环境研究中心
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