Soil degradation and restoration as affected by land use change in the semiarid Bashang area, northern China
文献类型：期刊论文
| 作者 | Zhao, WZ; Xiao, HL; Liu, ZM; Li, J; Zhao, WZ, Chinese Acad Sci, Cold & Arid Regions Environm & Engn Res Inst, Linze Inland River Comprehens Res Stn, 260 Donggang W Rd, Lanzhou 730000, Peoples R China |
| 刊名 | CATENA
 |
| 出版日期 | 2005 |
| 卷号 | 59期号:2页码:173-186 |
| 关键词 | Land Use Change Cultivation Degradation Land Abandonment Restoration Northern China |
| ISSN号 | 0341-8162 |
| 英文摘要 | The Bashang area, located in the semiarid agropastoral zone, represents a typical degraded ecosystem under intensified human activities. This region has undergone profound land use changes during the past century. Natural grasslands had been progressively cultivated, and subsequently, part of cultivated lands had been abandoned by farmers due to severe desertification. In this study, we collected soil samples (0-20 cm depth) from four farmlands on both flat and gentle slope lands where cultivation had occurred for 0, 8, 30, and 50 years to assess the effects of grassland cultivation on soil degradation. In addition, soil samples were taken and plant species were investigated from eight sites in age sequence of 0- to 50- year-old abandoned field to assess natural restoration process following field abandonment. The results showed that cultivation of grassland result in a significant soil degradation which is manifested by the coarsening in soil texture and the losses in organic C and nutrients. After 50 years of cultivation, soil organic C, total N, and total P concentrations had declined 73-79%, 60-70%, and 67-68% in the 0-20 cm plough layer, respectively. Over half of these losses occurred during the first 8 years of cultivation, and subsequent was slow. After fields were abandoned, vegetation got self-restoration, and plant species composition moved toward that of the natural grassland community with time. Soil organic C, total N, and total P levels gradually improved with increasing years of land abandonment, with a faster restoration rate in the early vegetation recovery stage and a slower rate in the late succession stage. The results suggested that soil degradation may occurred drastically by inappropriate land use and management with a short time, while soil restoration for a degraded ecosystem may take long period of time, especially in this fragile ecosystem. From the perspective of soil resource management and desertification control, conservational tillage and management for farmlands and proper grazing management for recovered grassland should be taken into account in this area. (C) 2004 Elsevier B.V. All rights reserved. |
| 学科主题 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000225679300004 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/55221]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所 |
| 通讯作者 | Zhao, WZ, Chinese Acad Sci, Cold & Arid Regions Environm & Engn Res Inst, Linze Inland River Comprehens Res Stn, 260 Donggang W Rd, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, WZ,Xiao, HL,Liu, ZM,et al. Soil degradation and restoration as affected by land use change in the semiarid Bashang area, northern China[J]. CATENA,2005,59(2):173-186. |
| APA | Zhao, WZ,Xiao, HL,Liu, ZM,Li, J,&Zhao, WZ, Chinese Acad Sci, Cold & Arid Regions Environm & Engn Res Inst, Linze Inland River Comprehens Res Stn, 260 Donggang W Rd, Lanzhou 730000, Peoples R China.(2005).Soil degradation and restoration as affected by land use change in the semiarid Bashang area, northern China.CATENA,59(2),173-186. |
| MLA | Zhao, WZ,et al."Soil degradation and restoration as affected by land use change in the semiarid Bashang area, northern China".CATENA 59.2(2005):173-186. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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