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Abstract：
Food security is one of the important issues in the current world development process. The article takes 31 provinces (districts and cities) in China as the research object and constructs a multidimensional food security level evaluation index system from four dimensions: quantitative security, nutritional security, ecological security, and capacity security. Using the entropy method, China\'s food security index was calculated for the ten-year period from 2013 to 2022. Overall, China\'s food security level showed an upward trend during the decade, with the provinces of Shandong, Heilongjiang, and Henan having the highest level of security. The distribution dynamics of food security and its spatiotemporal evolution in the seven regions were examined using the Dagum Gini coefficient and its decomposition, and the absolute and conditional convergence of food security in the different areas was verified. The results of the study show that the provinces within East China have the largest gap in food security levels between them, and there is absolute β-convergence. Looking at China as a whole, the development of its food security level is characterized by significant convergence, which means that provinces with a low level of food security will have a faster rate of growth than those with a high level of food security, resulting in a gradual narrowing of the gap in food security levels between provinces.
摘要：
粮食安全是当前世界发展进程中的重要问题之一。文章以我国31个省(区、市)为研究对象,从定量安全、营养安全,生态安全,和容量安全。使用熵方法，计算了2013年至2022年十年的中国粮食安全指数。总的来说,中国的粮食安全水平在这十年中呈上升趋势,与山东各省，黑龙江,河南的安全级别最高。利用Dagum基尼系数及其分解，考察了七个地区粮食安全的分布动态及其时空演变，验证了不同地区粮食安全的绝对趋同和条件趋同。研究结果表明,华东地区各省之间的粮食安全水平差距最大,并且存在绝对β收敛。把中国作为一个整体来看，其粮食安全水平的发展具有显著的趋同特征，这意味着粮食安全水平低的省份将比粮食安全水平高的省份有更快的增长速度，导致各省之间粮食安全水平的差距逐步缩小。
