Earthworms reduce nutrient loss from loess soil slopes under simulated rain
文献类型：期刊论文
| 作者 | Wen, Shuhai1,2,3; Wang, Jiao3; Li, Yanpei4; Liu, Yu-Rong1,2; Shao, Ming'an3 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 438页码:9 |
| ISSN号 | 0016-7061 |
| 关键词 | Earthworms Nutrient loss Runoff Erosion Slope Loess Plateau |
| DOI | 10.1016/j.geoderma.2023.116654 |
| 通讯作者 | Wang, Jiao(wangjiao@igsnrr.ac.cn) |
| 英文摘要 | Burrowing, feeding, and casting activities of earthworms affect nutrient cycling and hydrological processes that take place in sloping lands. However, the effects exerted by earthworms on nutrient losses associated with runoff and sediment during rain remains unclear, particularly in the Loess Plateau, where soil erosion and nutrient loss have led to severe environmental issues. In this study, our purpose was to quantify the effects exerted by the anecic earthworm species, Metaphire guillelmi, on nutrient loss via runoff and erosion in loess soil slopes. Six artificial grass slopes (mesocosms, 15 degrees), comprising three with earthworms (100 individuals m-2) for 28 days, and three without earthworms, were subjected to simulated rain (90 mm h-1) for 60 min. Our results indicated that earthworms had (i) increased the content of NO3--N from 8.1 to 151.8 mg kg- 1 and OP from 51.0 to 71.8 mg kg- 1, but decreased the content of OC from 6.6 to 5.2 g kg- 1, TN from 0.76 to 0.62 g kg- 1, TP from 0.73 to 0.68 g kg- 1 and NH4+-N from 3.7 to 2.4 mg kg- 1 at surface 2 cm soil; (ii) increased water-stable macroaggregates from 45.1 to 48.3% and soil saturated water conductivity from 0.07 to 0.28 mm min- 1, and (iii) greatly reduced the cumulative runoff from 65.7 to 15.3 mm and sediment occurance from 0.44 to 0.16 kg m- 2 on slopes. Consequently, earthworm activities decreased runoff-associated nutrients (decreased NH4+-N from 19.5 to 2.8 mg m- 2, NO3--N from 108.2 to 26.2 mg m- 2, and SP from 2.2 to 0.1 mg m-2) loss by 75.8-96.2%, and sediment-bound nutrient (decreased OC from 2.4 to 0.8 g m- 2, TN from 0.3 to 0.1 g m- 2, TP from 0.3 to 0.1 g m-2) loss by 63.8-68.5%. Hierarchical partitioning and variation partitioning analyses showed that runoff and sediment yields and their interaction with the soil physical characteristics were the dominant pathways via which earthworms regulated nutrient loss during rainfall events. This study highlights the importance of soil fauna in regulating erosion and nutrient loss in the Loess Plateau, and indicates that these factors should be considered in future water and soil conservation management. |
| WOS关键词 | LAND-USE ; BURROWING ACTIVITIES ; METAPHIRE-GUILLELMI ; EROSION ; ECOSYSTEM ; RUNOFF ; CASTS ; WATER ; DYNAMICS ; TERMITES |
| 资助项目 | National Natural Science Foun-dation of China[42207391] ; National Natural Science Foun-dation of China[42107331] ; China Postdoctoral Science Foundation[2022M711266] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001075634300001 |
| 资助机构 | National Natural Science Foun-dation of China ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/198571]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Jiao |
| 作者单位 | 1.Huazhong Agr Univ, Natl Key Lab Agr Microbiol, Wuhan 430070, Peoples R China 2.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.Northwest A&F Univ, Coll Nat Resources & Environm, Key Lab Low carbon Green Agr Northwestern China, Minist Agr & Rural Affairs, Yangling 712100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wen, Shuhai,Wang, Jiao,Li, Yanpei,et al. Earthworms reduce nutrient loss from loess soil slopes under simulated rain[J]. GEODERMA,2023,438:9. |
| APA | Wen, Shuhai,Wang, Jiao,Li, Yanpei,Liu, Yu-Rong,&Shao, Ming'an.(2023).Earthworms reduce nutrient loss from loess soil slopes under simulated rain.GEODERMA,438,9. |
| MLA | Wen, Shuhai,et al."Earthworms reduce nutrient loss from loess soil slopes under simulated rain".GEODERMA 438(2023):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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