Spatial Pressure Distribution of Cultivated Land and the Analysis of Food Safety in Kunming City, China

The social and economical condition, cultivated land resources and general situation of grain production of research area are introduced. According to relevant data of cultivated land of Kunming City in 2006, taking the minimum per capita cultivated land and index model of cultivated land pressure, and combining with two conditions of per capita grain demand which are 300kg and 400kg, the comparative research method was used to calculate and analyze the minimum per capita cultivated land and index model of cultivated land pressure. The results show that when per capita grain demand-Gr is 300kg, the per capita cultivated land in Kunming City has regional differences, reflects different regular patterns of spatial distribution, and presents obvious and typical radial distribution. Urban area of Kunming has the lowest point and be taken as the center, per capita cultivated land decreases progressively from suburban to the periphery; when per capita grain demand-Gr is 400kg, under the same consumption level, cultivated land pressures of each county in Kunming City are different, and so are the driven factors; when per capita grain demand-Gr is 300kg or 400kg, the indexes of cultivated land pressure in Kunming are all greater than 1, cultivated land pressure is enormous, the indexes of cultivated land pressure of each county (district) have two conditions—greater than 1 and less than 2, and the reasons differ from one another. Combining with the spatial distribution characteristics of the cultivated land and food and the situation of industrial development, the countermeasures and suggestions are put forwarded to make full use of back-up cultivated land, to plan the distribution of industrial structure in each county (district) of Kunming City as a whole, to dispose cultivated land resources reasonably and so on.