Study On Land Use Change And Grain Security In Duolun County Of Inner Mongolia

The study selects Duolun County of Inner Mongolia as the research area,with the TM images in 2015,and the land massage of 1987,1995,2000,2005,2010 and as basic data source in order to extract the land use data changes,then research the dynamic change of Duolun County land use during 1987 to 2015 based on the function of spatial analysis of GIS.On the basis of that,analyze the grain production and influencing factors of it based on the collecting of the data on natural,social and economic factors in Duolun County,and make the the forecast of grain supply and demand in the next ten years.Providing theoretical reference and scientific on land use and food production to Duolun County for the next step.The main conclusions are as follows.1.During 1987 to 2015,the land use structure in Duolun County transferred farmland,grassland and forest land in 2015 already from farmland,grassland and unused land in 1987.The area of forest land had increased largest and the unused land decreased most among that.2.By using the PCA(principal component analysis)to know,social economy,sunshine hours,annual average air temperature and humidity are the factors of the effecting of in the farmland changes in Duolun County.3.Total grain production increased 83080t from 1987 to 2015,and the grain yield increased from 375.89kg/hm2 in 1987 to 1774.95kg/hm2 in 2015.The planting area of grain crops has an absolute advantage in the total sown area.For the volatility of total grain yield and grain yield are very intense that the food production was very unstable and the food production was extremely unsafe during these years in Duolun County.4.The sorting of the relationship of total grain yield and socioeconomic factors is per unit yield,the level of agricultural mechanization,the sown area of grain and the total amount of fertilizer.5.The pressure of farmland is small,and the cultivated land resources situation is good.The condition of grain production is in safe.So what,it can support the return the grain plots to forestry in Duolun County.The state of the relationship between human and food is extremely unstable,and there is a violent and frequent fluctuation.So it can still meet the local policy of returning farmland to forest as well as the implementation of a type of food and clothing,food consumption standards with the cultivated land area in Duolun County and grain production,but have not provide a stable state of human grain relationship.6.It can meet barely fed and clad and a more comfortable life with the level of the food supply level in the next 10 years.For the demand of the rich and the supply is so close,that we should improve the grain yield and the quality of farmland in further in order to make the local people to achieve the lever of rich demand of food.