Study On The Benefit Of Planting Structure Adjustment In Zhengzhou

China is a large agricultural country in the world.Nowadays,the factor that greatly restricts China's agricultural development is water resources.Water resources tend to have an imbalance between supply and demand.At the same time,excessive development of already limited water resources will make some The occurrence of lower groundwater levels in some areas is not conducive to maintaining a good ecological environment.Therefore,it is necessary to carry out a more in-depth and detailed investigation around the issue of water resource utilization,and adjusting the planting structure will be able to optimize the existing water resources to a certain extent.This article takes Zhengzhou as the research object,first analyzes the crop planting structure and water structure of the past years,and then takes the agricultural economic benefits and the maximum virtual water and the minimum agricultural costs as the objective functions.Based on ensuring that the local resources are sufficient,the current Planting structure,building a scientific and appropriate optimization model.Zhengzhou lacks water resources and the per capita water resources are seriously insufficient.With the development of the economy,in order to make up for the shortage of water resources,through the adjustment of the planting structure,the utilization of water resources has been increased.The multi-objective function of crop yield,virtual water benefit and water saving benefit was converted into a single objective function by weighting coefficient method,and then solved based on MATLAB's linprog function.The following conclusions were reached through research:(1)The current planting area in Zhengzhou is decreasing year by year,and the current period is relatively stable;however,the planting structure of crop performance has fluctuated significantly and the stability is poor.Therefore,the planting structure of Zhengzhou should be adjusted on the basis of"keeping the ration",so as to keep the crops at a certain level all the year round.(2)Based on the optimization of crops in Zhengzhou area,profits increased by 8.208billion yuan,accounting for 94%of the profit before optimization,and the virtual water volume increased by 1.27 billion m~3,accounting for 36%of the virtual water volume before optimization.The virtual water benefit also increased by 13.148 billion yuan.It accounted for 86%of the virtual water benefit before optimization.The amount of irrigation water was reduced by 605.7 million m~3,and the water saving effect was obvious.Adjustment of planting structure The agricultural economy has been greatly improved,farmers'enthusiasm for planting crops has been improved,and water resources have been effectively used,and the competitiveness of water resources has been greatly improved.The optimization plan can meet the local people's demand for food,and it can also satisfy the control of local water resources while maximizing the economic benefits of crops.