摘要
保持一定数量的耕地资源是实现区域粮食安全的重要保障。为此,以人地矛盾突出、城乡差距明显的重庆市为研究对象,采用最小人均耕地面积和耕地压力指数模型对其耕地和粮食生产的动态变化进行分析。结果显示:重庆市耕地面积和人均耕地面积逐年下降;粮食产量从2000年开始有所增加,人均粮食与粮食产量变化具有同质性;从2000年开始,耕地压力指数大于1,粮食出现缺口,耕地压力比较明显,这说明重庆市有从粮食产销平衡区转向销入区的趋势。
It is important to protect a certain amount cultivated land resources for grain safety. This paper analyzes the dynamic changes of cultivated land resources and grain in Chongqing which is obvious in human-land conflict and urban-rural gap. The model of minimum cultivated land per capital and pressure index of cultivated land are used. The results show cultivated land and cultivated land per capital were descendent; Grain production rised,grain production and grain production per capital had the same change trend from 2000; Pressure index of cultivated land exceeded 1 since 2000,cultivated land pressure was obvious.
出处
《农机化研究》
北大核心
2010年第9期12-15,共4页
Journal of Agricultural Mechanization Research
基金
教育部人文社会科学研究2007年度规划基金项目(07JA630024)
关键词
耕地资源
粮食
耕地压力指数
重庆市
cultivated land resources
grain
pressure index of cultivated land
Chongqing
