Research On Water Saving Irrigation Mode And Benefit Post Evaluation Of Huanghai Farm In Yancheng City

Water saving irrigation is a complex project.With the rapid development of social economy,water resources are increasingly scarce in the process of its development.In order to ensure the demand of agricultural production for water resources,it is necessary to build modern irrigation agriculture with water saving and high efficiency.At present,Huanghai farm generally uses flood irrigation to irrigate wheat after rice.Because of the large area and low flatness of the plot,it is extremely easy to have large area of ponding,resulting in fertilizer loss,low fertilizer utilization rate,floating seeds,rotten seeds and other phenomena,affecting the yield of barley and wheat.Therefore,it is necessary to study the irrigation mode of Huanghai farm.By means of field investigation,theoretical analysis,evaluation model establishment and crop simulation test,this paper analyzes and compares the water-saving irrigation modes of Huanghai farm,and carries out post evaluation on its comprehensive benefits.(1)At present,the main water-saving irrigation technology in Huanghai farm is Canal Anti-seepage and water conveyance technology,the development of sprinkler irrigation and micro sprinkler irrigation technology is slow,and the waste of flood irrigation is still serious.Therefore,through the establishment of evaluation model,this paper compares and selects three water-saving irrigation modes of low-pressure pipe irrigation,micro sprinkler irrigation and sprinkler irrigation,and verifies by crop simulation test,and concludes that micro sprinkler irrigation technology is the best water-saving irrigation mode for rice crops in Huanghai farm.(2)Based on the environmental benefits,social benefits and safety benefits of water-saving irrigation project construction in Huanghai farm,the overall evaluation index system is constructed.The weight of index system is determined by analytic hierarchy process,and a set of reasonable and feasible comprehensive benefit analysis method of water-saving irrigation project is explored.Through this method,the post evaluation of water-saving irrigation technology benefit of Huanghai farm is good,and the evaluation results can provide an important basis for Huanghai farm to undertake the construction of farmland water conservancy projects in the future.(3)Preliminary design of irrigation metering facilities in Huanghai farm.Based on the natural conditions,water supply characteristics and water demand characteristics of Huanghai farm,the precision irrigation metering system of Huanghai farm is preliminarily designed,which realizes the intelligent control and precision metering of field water supply,strengthens the total water consumption control and management,and improves the scientificity and efficiency of farm water resource management.(4)This paper discusses the suitability of water-saving irrigation project in farm construction,and mainly introduces the development mode of Canal Anti-seepage Technology,low-pressure pipeline irrigation technology,sprinkler irrigation technology and micro sprinkler irrigation technology.At the same time,this paper discusses the safeguard measures,irrigation mode promotion and operation management mechanism of water-saving irrigation technology,and analyzes its rationality.