Coordinated Evolution of Grain Contribution and Ecological Contribution in Major Grain Producing Areas
The construction of major grain producing areas is an important measure to ensure food security in China,following the establishment of grain production demonstration areas.The grain field is the core element of its agricultural ecosystem.While grain fields primarily produce food,they also provide ecological value.The relationship between the grain contribution and ecological contribution of grain fields represents a unity of opposites,where each significantly influences the other.Based on relevant indicators of grain production input and output in China's major grain producing areas from 1999 to 2021,this study employs comparative contribution rates,coordination indices,and the Tobit model to empirically analyze the specific impacts of factors related to grain production input.The conclu-sions are as follows:As the input and output scale of grain production expands,the comparative contribution rate of grain has decreased while the comparative contribution rate of ecology has increased,leading to a gradual narrowing of the gap between the grain and ecological contribution rates among provinces in these producing areas;The number and production scale of provinces where grain contribution and ecological contribution coexist are gradually increas-ing,although inconsistency between grain contribution and ecological contribution remains prominent in large grain-producing provinces;The relationship between grain contribution and ecological contribution has evolved from near disequilibrium to primary coordination,although the level of coordination is still low;Cultivated land area,grain pro-duction facilities,and conditions exert a key influence on the coordinated development of grain and ecological contri-butions.Therefore,reinforcing the sustainability of food security remains a challenging task,which includes actively promoting an"environmentally friendly"production process;improving grain field productivity based on area while focusing on quality;utilizing the grain field ecosystem as the foundation for fostering the symbiotic development of grain field ecosystems and non-grain field ecosystems;and transitioning from intensive"grain agriculture"to multi-functional agriculture.
major grain producing areagrain contributionecological contributioncoordinated development
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