关键词: 农牧交错带, 土地沙质荒漠化, 扎鲁特旗

Abstract: Using TM images of the end of 1980s and 2000 as information source, we got the data of desertification land area in Zhalute Banner during these two periods by synthesizing, reinforcing, correcting, inlaying and man-computer together judging, and field surveying. The databank has been set up, including the database of conversion area between different grades of desertification lands, so the transition matrix of sandy desertification land has been established. The analyzing results are as follows: ①The sandy desertification of study region is very severe and the most is in light and middle grades and their proportion is 13.54%. ②Although desertification takes place in whole the region, it is the most severe in the south plain of Zhalot Banner, there are two belts of sandy desertified lands, and their extending boundary is the rock mountains in middle and north of the region. ③The sandy desertification is more severe in farming-pasturing mixed area than in mere-farming or mere-grazing areas. ④The dynamics of land sandy desertification are developing on the whole(with an increasing rate of 4.67%) and reversing in local(mainly happen in south part), and the desertification degree is becoming intensifying. ⑤The expanded area of sandy desertification land is 9 967.54 hm2, and the most is in middle part, the second in the north and the third in the south. ⑥The important anthropogenic factors of resulting in land sandy desertification are the misplay of management, the high-speed increasing of population, and the over misuse of land resource. So, it is imperative to control population increase speed, to adjust the land use structure and to reform the land use system, to enhance the management of land resource, and to strengthen the eco-environment construction.

Key words: farming-pasturing interlock zone, land sandy desertification, Zhalot Banner