Study About The Least Cultivated Areas Based On The Dynamic Balance Of Productivity

The problem of grain security has a long history. As the recent amount of cultivated land decreased, the sown area of the grain in our country has declined gradually, which endengers the grain security. The cultivated land is the fundamental reliance of human survival and development, and no substitute could be found as the capital goods to obtain grain or other farm product, and it plays a fundamental role on the sustainable development of agriculture and the national economy. Therefore, keeping the quantity and quality of cultivated land's resources and the basic food supply is directly relates to economie development, social stability and national security. Research of cultivated land protection plays a very important role in next general land using plan, which relates to the determination of the least cultivated areas. At present, Research of cultivated land's quality in cultivated land protection is very scarce.In this article, Research of cultivated land protection of Yongxiu county is combined with the next general land using plan and its'results of farmland production accounting. The research is mainly on the least cultivated areas which based on the dynamic balance of productivity. With the introduction of concept of production accounting, we should always keep the certain quantity of productivity as the hard targets, ensuring grain security, maintaining the local land productivity, and avoiding the quality decline of farmland which caused by simply protect cultivated area in the process of land using plan.Through analysis, we can get the following basic conclusions:Firstly, we analyzed the changes of Yongxiu County's farmland scale, althought its economy developed rapidly since 1996, we found that its farmland resources have declined, which shows that its increase speed is slower than its decline in the use of farmland resources. The reduction of farmland is mainly due to the occupation of Ecological restoration, construction and so forth. So the research of the least cultivated areas is of great significance.Secondly, applying the results of farmland production accounting, mainly 1:5 million farmland productivity database of Yongxiu County, we can summarize the theoretical capacity, feasible production capacity and actual production capacity of each township from the database. Farmland productivity accounting results show that there will be a great increase potential of Yongxiu County' production capacity, as long as increase investment in agriculture, including investment in infrastructure and technology in next few years. According to the index that Jiujiang assigned to Yongxiu, which shows the control index of the farmland occupation in new construction land use are 788.83 hectares, the supplement index are 2448.28 hectares and the least cultivated areas are 40144.44 hectares. Calculating according to the average actual yield (standard grain yield) 9254.37 kg/ha, the control index of farmland productivity is at least in the371,500 tons from 2006 to 2020. Therefore, to guarantee a certain quantity of productivety is very important to the total grain output.Thirdly, the reduction of farmland is mainly due to the occupation of Ecological restoration, construction and so forth during the general land using plan. The main methods of farmland increasing are as follows:land consolidation, development and reclamation. Through analyzing the two aspects, we can forecast the least cultivated areas of 2020. The least cultivated areas of Yongxiu must guarantee its own grain security during this period. We know that the total actual productivity are 362,700 tons in 2007. and 376,600 tons in 2020 through our prediction, which meets the food demand of Yongxiu and are greater than the control index 371,500 tons. The least cultivated areas, 39,007.26 hectares of 2020, are less than the control index 1137.18 hectares, however, the theoretical capacity, feasible production capacity and actual production capacity can meet the needs of the control index and the dynamic balance of farmland productivity and it can provide reference guideline for the government to use the cultivated land rationally.In addition, facing of the word-wide grain crisis, this research inspires that the improvement of the urbanization can not be seen as the single target in economic development of various regions of our country. To ensuring the certain quantity and quality of the least cultivated areas and to achieve the grain security is the specific reflections of implementing scientific development ideas, resulting in achieve the sustainable development of economy and society.