| 毛乌素地区农业用地方式转换与沙漠化 |
| |
| 引用本文： | 郝成元,吴绍洪.毛乌素地区农业用地方式转换与沙漠化[J].地理学报(英文版),2006,16(1):57-68. |
| |
| 作者姓名： | 郝成元 吴绍洪 |
| |
| 作者单位： | 中国科学院地理科学与资源研究所 |
| |
| 基金项目： | National Natural Science Foundation of China, No.40171040; Knowledge Innovation Project of the Institute of Geographic Sciences and Natural Resources Research, CAS, No.CXI0G-A02-03 |
| |
| 摘 要： | Introduction and the study area Desertification refers to land degradation phenomenon and process in arid, semi-arid and dry sub-humid areas (the humid index between 0.05 and 0.65) resulting from various factors, including climatic variations and human ac…
|
| 关 键 词： | 毛乌素地区 农业用地方式 沙漠化 土地问题 |
| 收稿时间： | 6/7/2005 12:00:00 AM |
| 修稿时间： | 2005-06-072005-09-26 |
The effects of land-use types and conversions on desertification in Mu Us Sandy Land of China |
| |
| Chengyuan Hao,Shaohong Wu.The effects of land-use types and conversions on desertification in Mu Us Sandy Land of China[J].Journal of Geographical Sciences,2006,16(1):57-68. |
| |
| Authors: | Chengyuan Hao Shaohong Wu |
| |
| Institution: | (1) Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, 100101, China;(2) Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China |
| |
| Abstract: | Based on multi-temporal remotely sensed materials of both 1985 and 2000, we analyzed the effects of land-use types and their conversions on desertification in Mu Us Sandy Land in the agro-pastoral transitional zone of north central China. In this study, the desertified land was classified into five degrees: potential, light, medium, severe and extreme. The results indicate that the extent of desertification expands slightly, while desertification degree is enhanced significantly. About 22.35% of the total land area in the study area is in the desertification course, and the expanded area of both severely and extremely desertified land accounts for 3.67% of the total area of Mu Us Sandy Land. About 9053 km of area witnessed changes in land-use types between 1985 and 2000, whi'ch accounted for 10.75% of the total. More importantly, the area of conversions among cultivated land, forestland and rangeland added up to 971.6 km2. This research reveals that both improper land-use types and conversions could accelerate the desertification process. Both cultivated land and forestland have more effects on the desertification development than rangeland. Some land-use type conversions, such as rangeland to cultivated land, rangeland to forestland and forestland to cultivated land, are attributed to the acceleration of the desertification development while the opposite can control the desertification development. |
| |
| Keywords: | land-use type desertification Mu Us Sandy Land agricultural land agro-pastoral transitional zone |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《地理学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《地理学报(英文版)》下载免费的PDF全文 |
|
