粮食主产区耕地生态足迹与粮食安全空间相关性分析

Analysis of Spatial Correlation between Ecological Footprint of Cultivated Land and Food Security in Main Grain Production Areas

耕地生态足迹可以定量评价耕地可持续发展状态,而耕地的生态状况影响长远粮食安全保障。基于2018年粮食主产区各省份省域截面数据,利用“区域公顷”耕地生态足迹模型计算耕地生态足迹,采用熵值法测算粮食安全水平,运用莫兰指数进一步分析其空间相关性。结果表明:人均耕地生态足迹和粮食安全水平均存在空间正自相关,总耕地生态足迹存在空间负自相关;粮食安全水平与人均耕地生态足迹存在显著的空间正自相关,其中,高—高聚集区分布在黑龙江,低—低聚集区分布在湖北、湖南、安徽和江苏,高—低聚集区分布在河南、山东;粮食安全水平与总耕地生态足迹存在显著的空间负自相关,高—低聚集区分布在山东;降低耕地生态足迹是提高粮食安全水平的有效途径。

The ecological footprint of cultivated land can quantitatively evaluate the sustainable development status of cultivated land,and the ecological status of cultivated land affects long-term food security.Based on the provincial crosssectional data of 13 provinces in the main grain producing areas in 2018,the ecological footprint of cultivated land was calculated using the“regional hectare”cultivated land ecological footprint model,the entropy method was used to measure the level of food security,and the Moran index was used to further analyze its spatial correlation.The results show that there is a positive spatial autocorrelation between the ecological footprint of per capita arable land and the level of food security,and the ecological footprint of total arable land has a negative spatial autocorrelation;there is a significant positive spatial autocorrelation between the level of food security and the ecological footprint of per capita arable land,among which high-high aggregation areas are distributed in Heilongjiang,low-low agglomeration areas are distributed in Hubei,Hunan,Anhui and Jiangsu,and high-low agglomeration areas are distributed in Henan and Shandong.There is a significant negative spatial autocorrelation between food security and total cultivated land ecological footprint,high-low concentration areas are located in Shandong Province;reducing the ecological footprint of cultivated land is an effective way to improve food security.