泾河流域土地利用区域分异与驱动力的关系

 为正确理解黄土高原土地利用区域分异的驱动力机制,改善黄土高原人地关系,借用植被数量排序方法,对黄土高原中部泾河流域的土地利用区域分异与驱动力的关系进行多元定量分析,认为:泾河流域土地利用格局存在明显的区域分异现象,地形坡度、降水、人口密度、农业机械化程度和河网密度是影响黄土高原土地利用格局区域差异的主要因子。地形坡度与林地、灌丛地的分布呈正相关,与居住、工矿用地的分布呈负相关;降水与林地的分布呈正相关;人口密度与耕地、居住工矿用地的分布呈正相关;农业机械化程度与耕地、灌丛的分布呈负相关。进而定量诊断出各种驱动力因子对该地区土地利用格局区域分异的贡献大小。

Relationship between land use space difference and driving factors in Jinghe River Basin

It is very important to make known mechanization of land use space difference on the Loess Plateau, whieh is the key in improvement of man-land relationship. The method of quantitative ecology to analyze multi-variation relationship between land use change and its driver faetors in Jinghe River Basin in middle of the Loess Plateau was borrowed. Land use pattern appears territorial differenee in middle of the Loess Plateau and its main driving factors are slope, rainfall, population density, meehanization of work farm and river density. Slope is positive to forest land ratio and shrub land ratio, while negative to that of building land. Rainfall is positive to forest land ratio. Population density is positive to farm land ratio and that of building land ratio. Meehanization is negative to farm land ratio and that of shrub land ratio. The quantitative canonical load of these driver faetors to ehange of land use pattern was given at last.