【摘要】 研究基于两步移动搜索法和网络分析方法等，对我国2000年与2016年小麦和水稻两种口粮的空间近域可达性开展研究。结果表明：(1)2000年与2016年全国361个城市和地区口粮近域可达性差异明显，呈现出较为明显的北高南低非均衡性特点，极化现象显著；(2)水稻与小麦近域可达性分布格局在全国范围内差异均十分明显，2016年全国水稻空间近域可达性水平较2000年有显著提升，小麦可达性提升则相对缓慢；(3)中国口粮产区与人口分布区呈现出显著的“人少粮多”与“人多粮少”空间错配现象。更多还原

【Abstract】 Based on the two-step floating catchment area method(2SFCA) and network analysis, we analyzed near-field accessibility of edible grain(wheat and rice) in China from 2000 to 2016. The results show that(1)there are significant differences in near-field accessibility of edible grain in 361 cities and regions in China. The spatial accessibility of edible grain is higher in the north than in the south. The regions with low accessibility are dominant and the polarization is significant.(2)Near-field accessibility of rice and wheat distribution pattern differences across the country are obviously. The spatial near-field accessibility of rice in 2016 was significantly higher than that in 2000. However, accessibility of wheat increase is relatively slow.(3)Edible grain and population distribution show a significant spatial mismatch of“more grain with fewer people”and“less grain with more people”.更多还原