作　　者： ; ; ; ; ;

机构地区： 中国农业大学资源与环境学院土地资源管理系

出　　处： 《土壤》 2007年第3期408-414,共7页

摘　　要： 以北京市平谷区为研究区域,讨论了不同地貌区耕地数量变化的空间差异及其流向,并利用多元回归方法分析了整个研究区以及各地貌区耕地数量变化的驱动机制。研究结果表明:①虽然各地貌区耕地数量变化具有空间差异性,但总体上均表现出强度大、比率高等特点;②整个研究区耕地数量变化的主要流向是园地,其次是建设用地;③对整个研究区以及各个地貌区两个层次上驱动机制的数理分析表明,不同区域耕地数量的变化是由不同的驱动因素导致的,但总体而言,其转化都是由社会经济环境和自然环境共同引起的,其中社会经济环境中的人文因素影响更大;④不论在何种地貌区域,耕地资源禀赋,即耕地本身的数量和质量,并不是一个驱动因子,说明耕地的转化程度不随耕地数量和质量的变化而变化,因此应加大对优质耕地以及重点区域耕地的保护力度。 Pinggu District of Beijing was selected for research on spatial difference between regions of different landforms in change in farmland acreage and trend of the changes. And the multi-factor regression method was used to analyze mechanisms driving the changes in the district as a whole and various regions of landforms. Results showed that： ①the changes in farmland acreage feature spatial discrepancy, high intensity and high rate; ②the main trend of the changes is the transition of farmland into orchards and followed by construction land; ③the analysis of driving mechanisms indicated that the driving forces vary from region to region different in landform, but all are the results of the joint effect of socioeconomic and natural environments, and among the form, human is the most important factor; and ④regardless of landform regions, quality and quantity of the cultivated land is not a driving factor of the change, suggesting that the transformation rate of cultivated land does not depend on change in quantity and quality of the land. It is, therefore, essential to intensify protection of quality farmlands and cultivated lands in some key agricultural regions.

关 键 词： 耕地 数量变化 驱动力 平谷区

领　　域： [经济管理]