Farmland Change And Its Impact On Grain Output In Henan Province

The fundamental material conditions of agricultural production is cropland, which changes will affect to fluctuations of the grain production.Especially in China, who has a large population with relatively little land,if not take effective measures will eventually endanger our food security, even social stability. Grain supplies influenced by many factors such as cropland area, sowing area, resources and environment conditions, science and technology, behavior of producer and the government policies. But Judging from the current ,the quantity and quality of cultivated land declining ,along with the resources and the environment threat will restricts food production. In a short time, science and technology not a decisive impact to grain output , while the cropland quantity dynamic changes in space and timeand quality variations has important effect on the overall productivity levels of cropland, as well as in food productionHenan is the biggest province of grain production in China, which total grain output is One-tenth of our cuntry and has directly relationship with our grain production level. In order to ensure the national food security and social stability,it guarded henan grain production ability is necessary. Therefore, analyse the relationship with farmland change and the grain production had great significance in He Nan.This article has system research on ofcultivated land dynamic change and grain production almost 30 years In He Nan.It divided into four parts:The first part is introduction, for the first chapter. This part mainly expounds the my research background, significance, contents, methods and technical route and the data sources, etc, and through the related literatures were reviewed, in order to make clear expatiates the scientific and reasonable.The second part is the second chapter,which is mainly defined concepts such as farmland and grain production, meanwhile study of the theoretical basis..The third part is empirical study,including third,fourth and fifth chapter. The third chapter described the general situation of researched area from the perspective of natural, social economic and so on. It represent that the changes of total grain, grain yield, the grain sowing area, replanting index and 18 cities's grain production capacity of spatio-temporal difference in He Nan.The fourth chapter give a description of the changes of HeNan's cultivated land resources quantity and quality. Using relative rate of farmland use describe the spatial variation of cultivated land resources and ArcGIS draw maps. In addition, using principal component analysis method in SPSS software quantitative analyzed the land driving forces of farmland quantity variation in HeNan .The result is the development of the economy and the improvement of urbanization rate had the geart influence of farmland in HeNan province. The fifth chapter's analysis and research mainiy based on the relationship with grain production and farmland change characteristics. This part pointed out that farmland is the basis of grain production.If we want to ensure food production we must guarantee a certain quantity of farmland, at the same time ,it provided the countermeasure for the arable land and food security. The fourth part is the conclusion and prospect, namely,sixth chapter. This part of the main content is that give the main conclusions and points out that this study needs to be further perfect place.This paper constructs the research framework is systematically analyzes and studies of He Nan's farmland change and graincrop production ,through this paper I hope made beneficial effect in the research of sustainable utilization of arable land and food security. Besides,I hope has certain practical meaning and reference value in henan's grain production strategy and formulate effectively land policies.