摘要
根据1996—2005年宁夏国土部门的统计数据,对宁夏耕地的动态变化进行分析,反映出近10年来由于城市建设的发展和生态建设的推进,宁夏耕地面积存在下降趋势.利用主成分分析法分析宁夏耕地面积变化的驱动因素,结果表明:社会经济综合作用、农业发展和退耕还林三大因素是影响宁夏耕地面积变化的三个主要驱动力因素.
On the basis of the statistical data from department of land management, the dynamic changes of cultivated land in Ningxia were analyzed to reveal the downtrend of cultivated land in Ningxia with the advances of urban development and ecological construction. The driving factors for the area changes of cultivated land were analyzed by PCA （principal component analysis）. The results showed that the synthetic effects of social economy, the agricultural development and returning farmland to forest are three main driving factors, which influence the area changes of cultivated land in Ningxia.
出处
《农业科学研究》
2007年第4期1-3,共3页
Journal of Agricultural Sciences
基金
国家自然科学基金资助项目(30660039)
关键词
耕地面积变化
主成分分析
驱动因素
宁夏
area change of cultivated land
analysis of principal component
driving factor
Ningxia
