Aggregate stability and size distribution regulate rainsplash erosion: Evidence from a humid tropical soil under different land-use regimes
文献类型：期刊论文
| 作者 | Zhu, Xiai1,2; Liu, Wenjie1,2; Yuan, Xia1; Chen, Chunfeng1,2; Zhu, Kai3; Zhang, Wanjun4; Yang, Bin1,2 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2022-08-15 |
| 卷号 | 420页码:12 |
| 关键词 | Splash erosion Soil organic matter Aggregate stability Aggregate size Land-use change Soil degradation |
| ISSN号 | 0016-7061 |
| DOI | 10.1016/j.geoderma.2022.115880 |
| 通讯作者 | Yang, Bin(yangbin@xtbg.ac.cn) |
| 英文摘要 | Soil erosion by water is a serious global ecological issue that leads to land degradation and threatens ecosystem sustainability. Splash erosion resulting from raindrop impact is the first stage of the erosion process and is mainly responsible for the detachment and migration of soil surface aggregates. In humid tropical regions, however, there has been little quantitative analysis of the relations between splash erosion and variable aggregate characteristics such as stability, particle size distribution and organic matter content. The objective of the current study was to determine how rain splash erosion is related to soil aggregate characteristics under land-use change, i.e., the conversion of tropical rainforest (TR) into rubber plantation (RP). Splash cups containing dry-sieved aggregate samples with eight size classes were exposed to natural rainfall to measure the splash erosion rate. The results showed that the initial aggregate organic carbon, water-stable aggregate index (WSA) and mean weight diameter (MWD) decreased by 31%, 9% and 48%, respectively, after 32 years of rubber cultivation. These degenerations in aggregate properties increased the susceptibility of soil aggregates to erosion and mutually contributed to a higher average splash erosion rate in RP (1.20 kg m-2) than in TR (1.09 kg m-2), regardless of aggregate size fractions. Splash erosion rates for all aggregate sizes were significantly positively correlated with rainfall kinetic energy, rainfall amount and intensity during the study period. The average splash erosion rate of aggregates first increased and then decreased with a decline in aggregate size in both TR and RP. The minimum and maximum splash rates were observed within 10-8 mm and 0.5-0.25 mm size fractions, respectively. In particular, the proportion of small-sized aggregates (i.e., 1-0.15 mm) with a relatively high splash erosion rate increased remarkably after land-use change. This exerted a negative impact on splash erosion control as well as on the sustainable development of rubber cultivation. Increasing the additional input of organic materials (e.g., intercropping cash crops with rubber trees) may help to enhance large aggregate formation and stabilization, which could minimize the risk of splash erosion at the aggregate scale for eroded rubber plantation ecosystems. |
| 资助项目 | Yunnan Funda-mental Research Projects[202101AT070056] ; Yunnan Funda-mental Research Projects[202101AS070010] ; National Natural Science Foundation of China[32101380] ; National Natural Science Foundation of China[32171557] ; National Natural Science Foundation of China[31570622] ; Youth Innovation Promo-tion Association CAS[2021397] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000794271200003 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/15928]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Yang, Bin |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Menglun 666303, Yunnan, Peoples R China 2.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Menglun 666303, Yunnan, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China 4.Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Peoples R China |
| 推荐引用方式 GB/T 7714 |
Zhu, Xiai,Liu, Wenjie,Yuan, Xia,et al. Aggregate stability and size distribution regulate rainsplash erosion: Evidence from a humid tropical soil under different land-use regimes [J]. GEODERMA,2022,420:12. |
| APA |
Zhu, Xiai.,Liu, Wenjie.,Yuan, Xia.,Chen, Chunfeng.,Zhu, Kai.,...&Yang, Bin.(2022). Aggregate stability and size distribution regulate rainsplash erosion: Evidence from a humid tropical soil under different land-use regimes .GEODERMA,420,12. |
| MLA |
Zhu, Xiai,et al." Aggregate stability and size distribution regulate rainsplash erosion: Evidence from a humid tropical soil under different land-use regimes ".GEODERMA 420(2022):12. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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