Study On The Land Production Potential Of Agricultural Region In Fujin City Based On GIS

Land productivity is the foundation and condition of agricultural production. It is a factor that can not be ignored to solve the contradiction between the economy population, resources and food. With the continuous growth of China’s rapid economic development and population, the pressure on land resources which human existence brings grows with each passing day. The state pays more attention to the structure of the three major industries and high-tech industry development adjustment. Pay attention to solve the contradiction between economic growth and resource and the countermeasures o improve the ecological environment.To effectively solve the regional land conflicts,to solve the needs of agricultural production and land quality worsening and so on. We should make full use of the space information technology in various regions of the land production capacity for building a database analysis and dynamic monitoring of land use situation. The production potential of land suitable evaluation platform base on GIS is thus produced. Use the stick of geographic information system in theory, aiming at the production of land resources of regional agricultural potential, provide the data basis for further studies of land resource, but also provide scientific basis for rural land system policy promotion.This study uses a geographical information system(GIS) as the analysis tool and method. Try to establish the regional differences of land productivity and the simulation model on the agro ecological zone method and mechanism of the "law basis". And then to generate various indicators of spatial distribution map. Production potentiality of cultivated land potential grade classification and analysis the potential distribution. Analysis spatial pattern of land natural productive potential and Productivity difference of agricultural region of Fujin. Finally, combined with the actual situation in the area of Fujin city and puts forward several suggestions. The main research content and achievements are as follows:(1)This paper applies the method of mixed model gradually decay, considering the light, temperature, water, soil and other natural ecological factors, to estimate the choice of three kinds of main crop land production potential. Correction coefficient of energy conversion, crop coefficient, economic and other related parameters in the process of calculation In order to get the crop photosynthesis production potential; The calculated light and temperature production potential crop using effective coefficient model of Sun Huinan; On the basis of water land actual evapotranspiration and crop get climate production potential; According to the analysis method and the comprehensive factors AHP, draw the relevant expert advice will be black soil thickness, organic content, soil texture, drainage and other seven kinds of indexes were standardized and gain weight to calculate the land potential productivity of each potential unit. Finally get the land productive potential distribution map of maize, rice, soybean in Fujin city. The improved calculation model is greatly attenuated compared with the original model. So the result is more close to the actual crop yield and production and capacity assessment of local will provide reference for the.(2)This study took the soil effective coefficient as the classification of land production potential index. Dividing the production potential of Fujin city agricultural area of cultivated land into six grades and detailed analysis on the spatial pattern of potential production. From the crop production potential of land distribution, agricultural district of Fujin city belongs to the corn quality area. A large area of corn crops to achieve high yield. Small maize potential productivity in Northeast, comparison is not suitable for planting; The difference of rice production potential and differentiation characteristics is obvious, the northern area of rice production potential is relatively small, rice production potential in the central area is larger, the southern area of the second; Soybean production potential is relatively homogeneous. The study area as a whole are more suitable planting soybean, but compared with maize and rice crop yield is low, which is one of the reasons the soybean planting area reduces year by year.(3) The calculation results from the output potential land productivity to see land potential productivity of towns are lower than the actual yield of maize. Explains the research region the actual climate condition, soil condition is more suitable for the growth of crops. The Yang Chuan Zhen output rate is the highest, the land utilization degree, higher input level; Land potential productivity of rice is close to the actual yield, output rate of close to 1 and less volatile and status of exploitation and utilization of the land is reasonable; But the land potential productivity of soybean were higher than the actual yield. Show the research on land use status failed to achieve the desired degree of region. If strengthening farmland infrastructure, construction, soil conditions, yield of soybean will have certain promotion space.