Research On Estimate Of Cultivated Land Production Potential In Luobei County Based On Agriculture-used Land Classification

Cultivated land is the basic resource for human,is the material basis for the sustainable development of society,is the fundamental guarantee of national food security.Cultivated land quantity,quality and ecological environment changes will inevitably lead to the change of the area sown to grain,affecting food production,is directly related to national food security and social stability.In order to achieve the cultivated land quantity,quality,and the ecological three body a goal,on the basis of agriculture land classification,grasp the quality and quantity of the cultivated land,the research on estimate cultivated land production potential can effectively relieve the contradiction between population,land,food crisis in our country.Thestudy takes the Luobei county of Heilongjiang province as the research area,its standard farming system is corn,benchmark crops include rice,corn,and soybean meal.Land evaluation related theory as a guide,use of technical means such as GIS and SPSS,such as combination of qualitative and quantitative methods,based on the agriculture-used land classification,a study on calculation of Luobei cultivated land production potential.The main content of research and achievements have the following three points:(1)Through the application achievements of farmland classification and grading results and the theoretical basis of the cohesion between the production potential,cultivated land production potential system is composed of nature and utilization,economic and practical production potential.Using the agriculture-used land classification of each index such as natural,utilize,economic production potential,respectively for 911300 tons,625400 tons,458700 tons.(2)Using SPSS software,analysis of Luobei nature,utilize,economic index and correlation of actual standard food production,standard of grain production and agricultural land use index such as correlation coefficient is greater than 0.85,significant correlation.Based on this study,using 270 sample data for Logistic regression curve fitting model.On the basis of the utilization of index,build standard grain yield calculation model,and then measure Luobei farmland real production potential of 375900 tons,by the comparative analysis of the test accuracy is higher,in line with the actual situation.(3)According to the Luobei county each villages and towns land productive potential space distribution,the areas are concentrated relatively of high production,the main town of unity centered around the diffusion potential gradually reduced.Throughout the town average grain crop yield up to 2252.32 kg/hm2,minimum 587.21 kg/hm2.By cultivated land production potential theoretical value and practical value to calculate cultivated land production potential space of extension,the results of natural,utilization,economy production potential of the excavated space are 53.54,24.94,82800 tons,extension degrees respectively are 58.75%,39.89%and 18.05%.The result shows that Luobei still has great potential mining space,this also provides the reference basis for the later development of land consolidation and backup resources investigation.