扎鲁特旗退耕还林还草分析

运用GIS和RS方法,从不同数据源获取所需的土地利用、地形坡度、土地沙漠化、土地适宜性等数据资料,在分析单项因子的基础上,研究了扎鲁特旗的旱耕地与其它因子的关系,确定了退耕地的面积、空间分布及其利用途径,主要结论是:旱耕地是扎鲁特旗的主要耕地组成,也是退耕的主要对象。坡度大于15o的旱地面积占旱地面积的0. 14%;沙化耕地面积占旱地的9. 68%,而且,旱耕地中,大部分为宜林宜牧土地,即使是多宜性耕地,宜农等级也较低。应退耕旱地面积14661hm2,占旱地面积的5. 34%。在退耕地中,宜还林地面积为5635hm2,还草地面积9026hm2。退耕地主要分布在南部,该旗南部边界多适宜退耕还林,而东南部边界的退耕地适宜种草,发展牧业。

Study on Conversion of Cropland to Forest and Grassland in Zhaluteqi

By the aid of GIS and RS, the data of land use, slope class, land desertification and land suitabilitywere gained from several kinds of data. Each kind of data was analyzedand also the correlationof dry cropland with slope class, desertification land and land suitabilitywas studied. The area, distribution and its use types of suitablefor returning to forest or grass land from dry crop land were obtained.The conclusions as follows: the dry crop land is the largest part of crop land in Zhaluteqi and is the main land for conversing to forest and grass land. 0.14 percent of dry crop land is such the land that the slope is more than 15o , the desertification crop land is 9.68 percent, and large part of dry crop land is not suitable for cultivated but suitable for forest or grass, the degree of suitabilityfor crop is much low in the tatal suitabilityland. The area of dry crop land should be converted to forest and grass is 14661 hm 2, account for 5.34 percent of all dry crop land. Among the converting dry crop land, the area convertingto forest is 5635 hm 2, and the area converting to grass land is 9026 hm 2. The dry crop land converting to forest and grass land mainly distributed in the south of Zhaluteqi.