Based On The Evaluation Of The Food Security Of The County Land Pressure

Food security，which relates to the safety of the country, is the basis for countries to maintain stableeconomic development. As China’s major grain producing areas, Henan province plays an important role innational food security strategy. Known as the "Chinese flowers County", Yanling county is a traditionalagricultural county in Henan province. In recent years, It has being adjusting planting structure, promotingthe industry management. Driven by market interests is bound to arable land converted to other land, andthe increased acreage of cash crops and non-agricultural land is a potential danger on food security.Therefore, doing researches on Yanling County farmland pressure to identify the impact on foodproduction factors have an effect on ensuring food security for Yanling County reality.Based on the theory of sustainable development, human co-ordination theory, theory of scarcity ofland, food security theory, the paper analyzes the food security situation in Yanling county with the help ofProfessor Cai Yunlong defined by the minimum per capita arable land area and the pressure index oncropland model, and the relevant elements of the pressure index on cropland from1996to2010. Theseelements include population, grain yield, total grain output, the proportion of area sown to grain, multiplecropping index, food self-sufficiency rate, by which to analyze whether Yanling County’s food productioncan meet the needs of the existing standard of living. By borrowing the other research’s results, it makescomparisons between Yanling County’s farmland pressure status and the arable land of18cities in HenanProvince pressure situation; it also annalyzes Yanling County townships of cultivated land pressure, andpoints of township farmland pressure index to compare the pressure index on cropland at the township fordifferent reasons. Pressure index on cropland in the last gray system model GM (1,1) to forecast and predict the Yanling County in the different levels of food self-sufficiency rate pressure index on cropland.The gray correlation is used in this paper to analyze the impact of the actual grain yield of factors ofYanling County, in order to identify the main factors affecting the yield of grain, and proposedrecommendations to increase food production to ensure food security.The results show that:(1) From1996to2010, real per capita arable land in Yanling County continues to decline, theminimum per capita arable land area showing the trend first and then decreased, consistent with the trendof the pressure index on cropland and the trend of the minimum per capita arable land area. In2003, thepressure index on cropland is the largest, slightly greater than1, food security is threatened, which iscaused by the natural disasters. Arable land pressure in the other years is relatively small, the pressureindex on cropland is less than1, which does not exceed the the farmland warning line, and food productionis sufficient enough to meet people’s demand to ensure food security. Overall, the arable land pressure issmall in Yanling County, in the state of food security.(2) By comparing the farmland pressure of Yanling County townships, we can find that cultivatedpressure difference is due to the economic development and the adjustment of industrial structure. In urbanareas, the pressure index on cropland is the largest, which is greater than2. The index on cropland inMalaysian Township and Boliang Zhen is greater than1,because both areas are the flower production bases,they have the large acreage of cash crops, and food production is a relatively small.(3) Pressure index on cropland in Yanling County future projections indicate that the future of YanlingCounty’s farmland pressure is less than1, the food crisis will not appear. The planting structure could beadjusted appropriately in order to promote economic development. But land use must be strictly controlledfor food security.