| Food supply security is the basis for the orderly advancement of China’s modernization strategy.With the increase in national income and the upgrading of dietary structure,the rate of increase in domestic food is far from meeting the demand of residents for food,leading to an increasing amount of food imports.Data from the State General Administration of Customs show that in 2021,the import volume of three staple grains of rice,wheat and corn will be as much as 42.99 million tons,nearly double that of 2020,and the dependence on foreign countries is increasing,which indicates that there is absolutely no relaxation in guaranteeing the security of food supply.And to ensure the security of food supply can not be separated from the input of the factor endowment."With the emergence of the Lewis inflection point and the disappearance of the demographic dividend,the demand for factor endowments in agricultural production is undergoing fundamental changes.Coupled with the continuous reduction of arable land and the non-agricultural transfer of young and strong rural labor,how to break through the constraints of modern agricultural development factors,"who to grow land" "how to grow land" and other difficult issues,is the key to ensure the security of China’s food supply.This paper takes industrial security theory,sustainable development theory,public goods theory and market equilibrium theory as the theoretical basis for research,and through combing and analyzing domestic and foreign literature,constructs an index system of grain supply security from six levels: quantitative security,quality security,structural security,economic security,reserve security and circulation security,and measures them using the entropy value method.After that,the current situation of grain supply security is analyzed in time and space,and the results show that the level of grain supply security in China shows a trend of fluctuation and change,but the overall level is not high and lies between 0.3 and 0.36;spatially,the level of grain supply security in Heilongjiang,Inner Mongolia,Jilin,Shandong,Jiangsu and Anhui is high,while the level of food security in Qinghai and Ningxia is at a low level.Finally,a fixed-effects model is used to study the impact of factor endowments on food supply security,and it is found that the abundance of factor endowments helps to guarantee food supply security,among which the level of capital and technology factor endowments plays a significant role in guaranteeing food supply security;heterogeneity analysis shows that factor endowments play a significant role in promoting food supply security in dryland-dominated cultivation areas as well as in major grain-producing areas;further analysis finds that under different The heterogeneity analysis shows that factor endowments play a significant role in contributing to food supply security in dryland-dominated growing areas and major grain-producing regions.Accordingly,the article proposes measures to ensure food supply security from three aspects: actively optimizing factor allocation,paying attention to the differences in factor endowments among regions,and encouraging the development of moderate scale operations. |