摘要
采用理论分析与模型分析相结合的方法,对重庆市耕地变化与经济发展的关系进行研究:耕地面积和人均耕地面积呈递减趋势,减少的程度由经济发达地区向经济不发达地区逐渐降低,不同区县耕地安全程度差异较大;耕地面积随人均GDP的增加呈显著减少,耕地面积年减少量与人均GDP的变化形式上呈现"倒U"型,但两者的拟合二次方程R2值较小,说明重庆市还没有真正呈现出经济发展对耕地占用减少的拐点。
The purpose of this paper is to study the relations of cultivated land change ,economy development and grain security.model method is employed.the results indicate that cultivated land and the per capital area of cultivated land decreased ,the decreased degree fall from the developed district to undeveloped disttict.cultivated security index is different in different district;cultivated decreased evidently with the per capital GDP development,the decrement of cultivated land and the per capital GDP take on ＂inverse U＂model,but the R2 of the quadratic equation is small,this show the inflexion of economy development engrossing cultivated decrease hasn＇ t appear.
出处
《国土与自然资源研究》
北大核心
2010年第2期36-37,共2页
Territory & Natural Resources Study
关键词
耕地资源
经济发展
重庆市
cultivated land resources
economic development
grain security
Chongqing
