粮食主产区土地生态与粮食安全耦合协调性分析

目的 分析粮食主产区土地生态安全和粮食安全耦合协调状况及时空演变,为提升粮食主产区土地生态与粮食安全协调发展水平及农业绿色发展提供决策参考。方法 文章以粮食主产区为研究对象,基于土地生态与粮食安全相关数据,构建土地生态安全与粮食安全的评价体系,采用熵权法、耦合协调模型和相对发展度模型定量分析了二者的综合评价值、耦合协调水平及耦合协调发展类型。结果 （1）2009—2018年粮食主产区土地生态安全与粮食安全耦合协调度从0.369增至0.433,呈“缓慢上升”态势,协调类型由轻度失调跃升至濒临失调,空间布局呈现“北高南低”的分布特征。（2）各省区耦合协调发展类型分为3类：低度磨合土地生态滞后、高度磨合同步发展及低度磨和粮食安全滞后。结论 针对土地生态与粮食安全的耦合协调发展类型采取差异化措施,实现粮食安全与土地生态安全协同发展。

ANALYSIS ON THE COUPLING AND COORDINATION OF LAND ECOLOGICAL AND FOOD SECURITY IN MAIN GRAIN PRODUCING AREAS

This research is intends to analyze the temporal and spatial evolution of the coupling and coordination of land ecological security and food security in main grain production areas, so as to provide decision-making reference for improving the coordinated development level of land ecology and food security in main grain production areas and the green development of agriculture. Taking the main grain producing areas as the research object, and based on the relevant data of land ecology and food security, this research constructed an evaluation system of land ecological security and food security, and quantitatively analyzed the two comprehensive evaluation value, the level of coupling coordination and the type of coupling coordination development by using the entropy method, the coupling coordination model and the relative development model. The results were showed as follows. (1) From 2009 to 2018, the degree of coupling coordination between land ecological security and food security in the main grain production areas increased from 0.369 to 0.433, showing a "slowly rising" trend, the coordination type jumped from mild imbalance to near imbalance, and spatial layout presenting the distribution characteristics of "high in the north and low in the south". (2) The types of coupled and coordinated development in various provinces and regions were divided into three categories: low-level running in land ecological lag, high-level running in synchronous development, and low-level running in and lagging food security. It concludes that differentiated measures are taken for the coupling and coordinated development of land ecology and food security to realize the coordinated development of food security and land ecological security.