Site and landscape position-dependent effects of vegetation removal on soil nitrogen mineralization across five sites on China?s Loess Plateau
文献类型：期刊论文
| 作者 | Kong, Weibo1,2,3,4; Yao, Yufei2,6; Hou, Lingcao4; Wang, Xiang2; Wei, Xiaorong2,3,4,5,7 |
| 刊名 | CATENA
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 215页码:12 |
| 关键词 | Net N mineralization Vegetation removal Landscape position China ?s Loess Plateau |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2022.106336 |
| 通讯作者 | Wei, Xiaorong(weixr@nwsuaf.edu.cn) |
| 英文摘要 | The soil nitrogen (N) availability is a key limiting element of terrestrial ecosystem productivity and functioning, especially in fragile ecosystems (e.g., eroding environments). However, to date, little is known about how vegetation and erosion individually or jointly affect soil N mineralization under field conditions across a range of sites varying in soil and climate properties on a long-term observational scale. In this study, we elucidated how soil net N mineralization responds to vegetation removal (plots with vs. without vegetation) and landscape position (eroding vs. depositional zones) during a two-year manipulation experiment using an in situ incubation method on the China's Loess Plateau. The results indicated that the nitrate and total mineral N concentrations and net nitrification and mineralization rates were higher in the eroding zone (2.74 +/- 0.12 mg kg-1, 4.47 +/- 0.13 mg kg- 1, 0.046 +/- 0.005 mg kg- 1 d-1 and 0.046 +/- 0.006 mg kg- 1 d-1) than those in the depositional zone (2.01 +/- 0.10 mg kg- 1, 3.80 +/- 0.12 mg kg- 1, 0.030 +/- 0.005 mg kg- 1 d-1 and 0.032 +/- 0.006 mg kg- 1 d-1) on the China's Loess Plateau. Vegetation removal resulted in an increase in the nitrate (2.88 +/- 0.13 vs. 1.87 +/- 0.09 mg kg- 1) and total mineral N concentrations (4.56 +/- 0.14 vs. 3.71 +/- 0.11 mg kg- 1), but did not affect the soil net N mineralization rates on the China's Loess Plateau. The effects of vegetation removal on soil mineral N pools depended on the site, season and landscape position, with stronger effects in the eroding zone than those in the depositional zone. However, the responses of the net N mineralization rates to vegetation removal were consistent across the various landscape positions and sites, but varied with the season. Variance partitioning revealed that soil properties rather than climate and vegetation conditions were the most dominant contributors to the variations of soil N mineralization in both the eroding and depositional zones, explaining 37.6-64.6% of the variation. These results emphasized the substantial spatial (landscape position and site) and temporal (seasonal) dependence of the effects of vegetation removal on soil N mineralization at large scale. |
| WOS关键词 | DISSIMILATORY NITRATE REDUCTION ; NET N MINERALIZATION ; LAND-USE ; ORGANIC-MATTER ; TENGGER DESERT ; HILLY AREA ; EROSION ; CARBON ; GRASSLAND ; ECOSYSTEM |
| 资助项目 | National Natural Science Foundation of China, China[41571130082] ; National Natural Science Foundation of China, China[41977068] ; National Natural Science Foundation of China, China[41622105] ; Chinese Academy of Sciences, China[QYZDB-SSW-DQC039] ; Northwest A&F University, China[2452017028] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000804506700002 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China, China ; Chinese Academy of Sciences, China ; Northwest A&F University, China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/178482]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wei, Xiaorong |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Soil & Water Conservat & Ecol Environm, State Key Lab Soil Eros & Dryland Farming Loess Pl, Minist Educ, Yangling 712100, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 4.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Peoples R China 5.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China 6.Northwest Univ, Coll Urban & Environm Sci, Shaanxi Key Lab Earth Surface Syst & Environm Carr, Xian 710127, Peoples R China 7.Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kong, Weibo,Yao, Yufei,Hou, Lingcao,et al. Site and landscape position-dependent effects of vegetation removal on soil nitrogen mineralization across five sites on China?s Loess Plateau[J]. CATENA,2022,215:12. |
| APA | Kong, Weibo,Yao, Yufei,Hou, Lingcao,Wang, Xiang,&Wei, Xiaorong.(2022).Site and landscape position-dependent effects of vegetation removal on soil nitrogen mineralization across five sites on China?s Loess Plateau.CATENA,215,12. |
| MLA | Kong, Weibo,et al."Site and landscape position-dependent effects of vegetation removal on soil nitrogen mineralization across five sites on China?s Loess Plateau".CATENA 215(2022):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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