偃师市耕地时空变化及驱动力分析

为从县级层面上了解耕地变化的趋势特点，更好地实现耕地资源保护及可持续利用，笔者研究了偃师市1997—2004年耕地时空变化情况，并运用主成分分析法，对影响耕地变化的主要驱动力因子进行了定性与定量分析。结果表明，1997—2004年偃师市耕地变化分为数量增加和数量减少两个阶段；变化幅度区域分布不同，经济发达乡镇高于落后乡镇，中心城区、重点乡镇高于一般乡镇，山区乡镇高于平原乡镇。其变化除受政策、观念等因素驱动外，经济发展也起到了重要的促进作用，并在此基础上提出了耕地保护的建议。

Study on the Cultivated Land Spatio-temporal Change and Driving Factors in Yanshi City

In order to find out the tendency of the cultivated land change in a city effectively protect and rationally use the cultivated land resource,the writer analyzes the cultivated land spatio-temporal change in Yanshi city during the period from 1997 to 2004.With the method of principle component analysis,the driving factors affecting the cultivated land change in the city are qualitatively and quantitatively researched.The conclusions as follows: During the period from 1997 to 2004 the cultivated land change in Yanshi city could be defined quantity added stage and decrease stage;the extent of change varied in areas,changes of the villages and towns of economy developed were greater than that of the villages and towns of economy draggled,changes of the center town and the pivot villages and towns were greater than that of the commonly villages and towns,changes of the mountainous areas were greater than that of level areas.Besides policy and idea factors,development of economy were also mainly to contribute to the change and some specific countermeasure were brought forth based on the change.