耕地布局北移对粮食产能的影响分析OA

Cultivated land is the lifeblood of grain production and the foundation for the sustainable development of the Chinese nation.In recent years,all localities have earnestly implemented the strategy of sustainable farmland use and innovative application of agricultural technology to increase farmland productivity,and paid close attention to the key points of cultivated land.The level of grain yield per unit area has been steadily improved,the planting structure has been continuously optimized,and the total grain output has remained stable at more than 650 million tons.But at the same time,the total area of cultivated land shows a downward trend in China,especially the distribution of cultivated land continued to move to the north,resulting in a certain degree of grain productivity loss.Using the Gini coefficient and Theil index analysis method,this paper selected the grain production indicators of 31 provinces(cities,autonomous regions)from 2000 to 2020,analyzed the variation of differences between production regions,and calculated the loss of grain production capacity caused by the number of cultivated land,layout,the balance of occupation and compensation and other influencing factors.Compared with 2009,the total loss of grain production capacity in 2019 was about 150 million tons due to the impact of the number of cultivated land,the northward shift of distribution,the balance of occupation and compensation,etc.Among them,the loss caused by the reduction of cultivated land was about 56.5 million tons;the loss caused by the northward shift of cultivated land distribution is about 90.5 million tons,and the loss caused by the balance of occupation and compensation is about 3.4 million tons.In addition,the reduction of paddy fields affected the loss of grain production capacity by about 22.5 million tons.To ensure national food security,it is necessary to resolutely implement the spirit of Xi Jinping important instructions and relevant important discussions.We must take effective hard measures to keep to baseline value of 120 million hectares of cultivated land,effectively strengthen the protection and construction of quality of cultivated land,plan and implement a package of cultivated land construction projects,take multiple measures simultaneously,and improve the comprehensive production capacity of cultivated land.