Study On Different Types Of Optimal Utilization Modes Of Water And Land Resources In Middle-and-lower Yield Fields In Huanghuaihai Plain

Huang-Huai-Hai plain is one of the main agriculture production regions with vast area, flat terrain, convenient traffic, abundant labor and good water and heat conditions. The main food crops here are wheat and maize and so on. Due to constrains of climate, soil and other factors, the region is of middle and low yield field mainly. After having referred to a large amount of domestic and foreign literature and analyzed the distribution and characteristics of different types of middle and low yield field in Huanghuaihai plain of Shandong province, water resources in these regions were analyzed and the status of water and land resources and existing problems were revealed. The research on modes of water and land optimal utilization and management of middle and low yield field could provide theoretical basis and model support for regional land utilization structure adjustment and has important significance to realize effective utilization of regional water and land resources, ensure stable increase of food yield and maintain agricultural sustainable development.The main research contents of this paper include:(1)Distribution and characteristics of different types of middle and low yield field in Huanghuaihai plain of Shandong province. The reasons and restricting factors of middle and low yield field were summarized, the region was zoned, the according development measures were explored, the development potential was analyzed and three kinds of regional control measures and modes were presented.’(2)Water resources balance analysis of different types of middle and low yield field in Huanghuaihai plain of Shandong province. After investigation, analysis and data processing, the total water volume, available water volume, demand and analysis of supply and demand balance of water resources in study area of Huanghuaihai plain of Shandong province were studied. The fruits show that water use for agricultural water and land resources comprehensive exploitation can be ensured in guaranteed rate of50%from the current year to2015, while it is lack of0.292billion m3water and1.017billion m3water respectively in current year and2015in the guaranteed of75%. As far as current water use and2015level year are concerned, the water use is surplus in the rate of50%, but water supply can not meet the water demand in the rate of75%.(3) Research on water and land resources utilization modes of middle and low yield field in Huanghuaihai plain. With an example, the optimal water and land resources utilization year are concerned, the water use is surplus in the rate of50%, but water supply can not meet the water demand in the rate of75%.(3) Research on water and land resources utilization modes of middle and low yield field in Huanghuaihai plain. With an example, the optimal water and land resources utilization mode of middle and low yield field in Huanghuaihai plain was conducted, which maximized benefit cost as the objective function on the basis of considering social and ecological benefit with multi-objective optimization of variable-bound method used in system engineering, after analyzing the conditions of infrastructures and various projects and calculating water and land resources in the region. The calculation result shows the total benefit under optimizing plant structure would improve107.5%, namely more than double, compared with under conventional planting structure.(4)Research on exploitation management mode of middle and low yield field in Huanghuaihai plain. According to all present kinds of management experience in demonstration area, the feasible management mode for current rural economy system was concluded.