Developing stages and causes of desertification in the Mu Us sandland

被引：15

作者：

Wu, B ^{[1
]}

Ci, LJ ^{[1
]}

机构：

[1] Chinese Acad Forestry, Chinese Res & Dev Ctr Combating Desertificat, Beijing 100091, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 1999年 / 44卷 / 09期

关键词：

Mu Us sandland; desertification developing stage; over-reclaiming; over-grazing; unrestricted cutting;

D O I：

10.1007/BF02885034

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Based on historical aerial photography of three periods and together with field investigation, the status of desertification development after the 1950s in the Mu Us sandland was analyzed, the difference of the desertification developing speed at two stages was compared, and its possible causes were explored. The results show that the developing speed of desertification from the late 1970s to the early 1990s is apparently slowed down, compared with that from the late 1950s to the late 1970s and there exists an obvious recovery trend at the second stage. The difference between the two stages accounts for severely over-reclaiming, over-grazing and unrestricted cutting during the first stage, which are the main causes of desertification development in the semi-arid steppe and arid desert steppe areas.

引用

页码：845 / 849

页数：5