Shifting sands to sustainable soils: Spatial dynamics of soil water and salinity in a desert oasis ecotone
文献类型：期刊论文
| 作者 | Cao, Qiqi1,2,3; Liu, Tao4; Xia, Jiangbao1; Li, Junran5; Ravi, Sujith6; Xin, Zhiming7; Xiao, Huijie2,3 |
| 刊名 | AGRICULTURAL WATER MANAGEMENT
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 316页码:109562 |
| 关键词 | Bare sand dunes Nabkha dunes Long-term cultivation Soil water-salt dynamics Deep soil profiles Secondary salinization risk |
| ISSN号 | 0378-3774 |
| DOI | 10.1016/j.agwat.2025.109562 |
| 产权排序 | 4 |
| 文献子类 | Article |
| 英文摘要 | Understanding the spatiotemporal patterns of soil moisture and salinity dynamics and their governing factors is essential for predicting salinization risks and developing mitigation strategies in arid agricultural landscapes. This study examined the vertical distribution (0-3 m) of soil water content (SWC), electrical conductivity (EC), and pH, and identified their dominant controls across bare sand dunes, nabkha dunes, and croplands of varying cultivation durations (2-5, 12-15, 25-30, and 40-50 years) in a desert-oasis ecotone of northwestern China. The results showed that SWC, EC, and pH generally increased with soil depth and were best described by quadratic or power functions. Bare sand dunes had the lowest values of all three parameters, while EC and pH peaked in nabkha dunes (188.20-636.83 mu Scm(-)(1) and 7.88-8.43, respectively), particularly those near the water area, where the early-stage cultivation may be more challenging. Conversion to cropland reduced surface (0-0.4 m) EC and pH by 7.3-34.7 % and 3.9-7.2 %, respectively, after 40-50 years of cultivation, in contrast, subsurface soil layers (0.4-3 m) exhibited stable EC and pH levels after long-term irrigation, with no significant changes between 25-30 and 40-50 years of cultivation (P > 0.05). However, subsurface salinity (0.4-1 m) in newly reclaimed croplands (2-5 years) tended to be higher than that in both nabkha dunes and older croplands, suggesting a potential risk of salinization in the new croplands, which require optimized irrigation. Soil texture was the dominant factor controlling SWC, while cultivation years primarily explained the variation in EC and pH. These findings reveal critical spatiotemporal dynamics in soil water-salt following land use change and offer guidance for optimizing irrigation practices to prevent secondary salinization in arid regions. |
| URL标识 | 查看原文 |
| WOS研究方向 | Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001499661100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/214524]  |
| 专题 | 千烟洲站森林生态系统研究中心_外文论文 |
| 通讯作者 | Xiao, Huijie |
| 作者单位 | 1.Shandong Univ Aeronaut, Shandong Key Lab Ecoenvironm Sci Yellow River Delt, Binzhou 256603, Peoples R China; 2.Beijing Forestry Univ, Coll Soil & Water Conservat, Qinghua East Rd 35, Beijing 100083, Peoples R China; 3.State Key Lab Efficient Prod Forest Resources, Beijing 100083, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Res Stn, Beijing 100101, Peoples R China; 5.Univ Hong Kong, Dept Geog, Hong Kong, Peoples R China; 6.Temple Univ, Dept earth & Environm Sci, Philadelphia, PA 19122 USA; 7.Inner Mongolia Dengkou Desert Ecosyst Observat Res, Dengkou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Qiqi,Liu, Tao,Xia, Jiangbao,et al. Shifting sands to sustainable soils: Spatial dynamics of soil water and salinity in a desert oasis ecotone[J]. AGRICULTURAL WATER MANAGEMENT,2025,316:109562. |
| APA | Cao, Qiqi.,Liu, Tao.,Xia, Jiangbao.,Li, Junran.,Ravi, Sujith.,...&Xiao, Huijie.(2025).Shifting sands to sustainable soils: Spatial dynamics of soil water and salinity in a desert oasis ecotone.AGRICULTURAL WATER MANAGEMENT,316,109562. |
| MLA | Cao, Qiqi,et al."Shifting sands to sustainable soils: Spatial dynamics of soil water and salinity in a desert oasis ecotone".AGRICULTURAL WATER MANAGEMENT 316(2025):109562. |
入库方式： OAI收割
来源：地理科学与资源研究所
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