Soil water dynamics and deep soil recharge in a record wet year in the southern Loess Plateau of China
文献类型：SCI/SSCI论文
| 作者 | Wang J.; Li Z.; Li Z.; Wang J. |
| 发表日期 | 2010 |
| 关键词 | Soil water recharge Eco-hydrology Loess Plateau Dryland farming conversion |
| 英文摘要 | Terrestrial water cycles are influenced by hydrologic and textural properties of the deep loess layer in the Loess Plateau. Analyses of soil water profile distributions are needed to understand the regional water cycle processes and to guide agricultural production and sustainability. The objective of this study was to quantify the extent of deep soil water recharge and soil water profile dynamics during 1987-2003, especially in a record wet year of 2003, in common cropping systems in a semiarid-subhumid region of the southern Loess Plateau. The Chinese Ecological Research Network (CERN) site and a long-term rotation experiment site in a flat tableland were selected for this study. Soil moisture profiles were measured by a neutron probe to a depth of 6 m in 2003. The precipitation of 954 mm at the Changwu County Meteorological Station in 2003 was 63.4% higher than the long-term average (584 mm), and was a record high since 1957. Although cropping systems affected deep soil water recharge, the persistent dry soil layer formed between 2- and 3-m depths in croplands, resulting from many years of intensive cropping, was fully replenished in all cropping systems in 2003. Further frequency analysis indicated that the desiccated layer between 2- and 3-m depths would be fully recharged at least once in about 10 years for all existing cropping systems excluding continuous alfalfa. This finding should alleviate concerns about the formation of a permanent deep-soil desiccation layer as well as its potential impact on the long-term sustainability of the existing intensive cropping systems in the region. (C) 2010 Elsevier B.V. All rights reserved. |
| 出处 | Agricultural Water Management |
| 卷 | 97 |
| 期 | 8 |
| 页 | 1133-1138 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0378-3774 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23434]  |
| 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 | Wang J.,Li Z.,Li Z.,et al. Soil water dynamics and deep soil recharge in a record wet year in the southern Loess Plateau of China. 2010. |
入库方式： OAI收割
来源：地理科学与资源研究所
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