Study on Measurement and Spatial-temporal Characteristics of Grain Security in Production-marketing Balance Areas—Taking Yunnan Province as an Example
[Objective]To measure and evaluate the grain security situation in Yunnan Province,one of the production and marketing balance areas,and provide reference for scientific exploration of grain security in Yunnan Province and even the whole country and local government decision-making.[Method]The paper used cultivated land pressure index model with quality coefficient optimization to conduct the quantitative analysis to grain security in Yunnan from 2003 to 2018.[Result]In terms of time,the grain security level of Yunnan Province continues to im-prove.In terms of quantity,the 16 prefectures(cities)in Yunnan Province,10 prefectures(cities)grain production has been effectively se-cured,accounting for 62.50%;and 6 prefectures(cities)are in insecurity,accounting for 37.50%.In terms of space,among them Qujing,Dali,Baoshan,Honghe and Wenshan 5 prefectures(cities)are moderately secure,Dehong,Puer,Lincang,Zhaotong and Chuxiong 5 prefectures(cities)are low secure,Lijiang and Kunming 2 cities are low insecure,Xishuangbanna and Yuxi 2 prefectures(cities)are moderately insecure,and Diqing and Nujiang 2 prefectures are highly insecure,and no high secure areas;grain secure areas are concentrated in the east of the prov-ince,followed by the west,the degree of insecurity from high to low in the northeast,south and central of province.[Conclusion]The grain secu-rity situation in Yunnan Province is in a state of insecurity,but the degree of insecurity is low,belonging to the low degree of insecurity.
Cultivated land pressure indexGrain securityMeasurementSpatiotemporal characteristicsYunnan Province
万方数据
维普
