利用1991 ～2008年北京市统计资料,分析了北京市耕地资源的时空变化特征,运用主成分分析法研究了影响北京市耕地数量变化的主要驱动因素.结果表明,北京市耕地面积总体上呈减少趋势,耕地年均减少2.43％；人均耕地面积也呈逐年下降趋势；影响北京市耕地资源数量减少的主要驱动因素在于人口增长、经济发展和城市化发展.%Using statistical data of Beijing from 1991 to 2008, temporal & spatial variation characteristics of cultivated land resources in Beijing are analyzed. The driving forces of cultivated land area change are analyzed using the principal component analysis method. The results show that the area of cultivated land in Beijing has been decreasing. The yearly decreasing rate is about 2.43%. The area of cultivated land resources per capita has been decreasing. The main driving forces of cultivated land decrease in Beijing are population growth, economic development and urbanization.
展开▼
