黄土丘陵沟壑区县域耕地变化驱动要素研究——以安塞县为例

土地利用变化的驱动要素研究是当前土地利用／土地覆盖变化(LUCC)研究的热点和关键问题之一。黄土丘陵沟壑区因其严重的水土流失问题，成为全国实施退耕还林还草措施的重点区域之一。运用典型相关分析，通过对典型区安塞县耕地数量、耕地质量变化驱动要素的定量分析，探讨了县域耕地变化的驱动要素，并运用典型相关系数和冗余度分析，对诊断结果进行了检验。为进一步研究整个黄土高原地区实施退耕还林还草政策提供借鉴，为该区土地利用的合理调整和水土保持的有效实施服务。

Arable Land Use Changes at County Level in Hilly Area of Loess Plateau China--A Case Study of Ansai County

The driving factors of land use is one of the hot and key component of land use and cover change research (LUCC). The Loess Plateau of China, because of its serious soil and water erosion problem, was designated as one of the three experimental sites in 1999 of the practice on returning cultivated slope land to woodland or grassland. On the basis of statistics, the impact of arable land use change was discussed in this paper. The case study was chosen in Ansai County, which is one of typical hilly areas of Loess Plateau. Both the quality and quantity changes of the arable land were analysis by the help of SPSS statistical software. The result indicated that the change of arable land quantity was influenced mainly by the population change and the change of arable land quality was impacted more deep by the yearly precipitation. The driving forces of arable land use change should be paid attention in order to ensure the success of practice on returning cultivated slope land to woodland or grassland. The ecological benefit and economic rule should be pay attention to at the same time.