为了能够清楚的揭示耕地对人类的贡献性,了解区域耕地-粮食-人口的关系状况,提出了耕地贡献指数模型,并进一步将耕地贡献指数按从低到高分为低温饱、温饱、小康、富裕4种水平.利用耕地贡献指数对全国以及我国13个粮食主产区、11个粮食平衡区、7个粮食主销区进行分析,结果显示,1949 ～2010年,我国耕地贡献指数整体上呈现上升趋势,1996 - 1999年一度达到小康水平,2010年再次达到小康,但离富裕水平还有相当一段距离；各粮食主产区耕地贡献指数相对较高,2010年全部达到小康水平,部分省甚至达到富裕水平；粮食主销区耕地贡献指数整体较低且下降趋势明显,尤其广东、浙江、福建下降趋势较快；粮食平衡区耕地贡献指教普遍不高,大部分省仍处于温饱水平.研究结果表明,耕地贡献指数能够简便、快捷地反映区域耕地-粮食-人口之间的关系状况.%In order to reveal the attribute clearly and to understand the situation of the regional cultivated land-grain-population relationship, this paper presents the "cropland contribution index" model, and divides the cropland contribution land index into four levels, that is below subsistence, subsistence, well-off, richness. Then, it analyzes the whole China, 13 main producing regions, 11 grain balancing regions, and 7 main sales regions. Results show that the overall cropland contribution index had a rising trend in 1949 to 2010, it once reached well-off level in 1996 to 1999, and it reached the well-off level again in 2010, but there is still a long way to reach the level of richness. The cropland contribution index is relatively high in main producing regions. In 2010, all main producing regions reached the well-off level, and some provinces even reached the richness level. However, the cropland contribution index of main sales regions is lower and takes on a downtrend, especially in Guangdong, Zhejiang, and Fujian Provinces. The cropland contribution index in grain balancing regions is not high, and most provinces are still at subsistence level. Researches have indicated that the cropland contribution index can simply and rapidly reflect the relation between regional cropland, grain and population.
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