Soil N retention and nitrate leaching in three types of dunes in the Mu Us desert of China
文献类型：SCI/SSCI论文
| 作者 | Jin Z.; Zhu, Y. J.; Li, X. R.; Dong, Y. S.; an, Z. S. |
| 发表日期 | 2015 |
| 关键词 | nitrogen deposition global drylands northern china inner-mongolia ordos plateau mojave desert ecosystem patterns water biogeochemistry |
| 英文摘要 | A large reservoir of soil nitrate in desert subsoil zones has been demonstrated in previous studies; however, information on the subsoil nitrate reservoir and its distribution characteristics in the deserts of China is still limited. This study investigated the distribution patterns of soil total nitrogen (N), nitrate, ammonium, and stable isotopic ratios of N-15 (delta N-15) in shallow (1 m) and subsoil (5 m) profiles in three types of dunes in the Mu Us desert of China. We found that soil N retention of the fixed and semi-fixed dunes followed a progressive nutrient depletion pattern in shallow soil profiles, whereas the subsoil nitrate of the fixed, semi-fixed and mobile dunes maintained a conservative accumulation pattern. The results indicate that the subsoil of the Mu Us desert may act as a reservoir of available nitrate. Furthermore, a soil delta N-15 analysis indicate that the nitrate content of the fixed dune is likely derived from soil nitrification, whereas the nitrate content in the mobile dune is derived from atmospheric nitrate deposition. Within the context of looming climate change and intensifying human activities, the subsoil nitrate content in the deserts of northern China could become mobilized and increase environmental risks to groundwater. |
| 出处 | Scientific Reports |
| 卷 | 5 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2045-2322 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38449]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Jin Z.,Zhu, Y. J.,Li, X. R.,et al. Soil N retention and nitrate leaching in three types of dunes in the Mu Us desert of China. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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