Research On Agricultural Development Model And Optimization Of Shengjin Lake Wetland

Wetland agriculture is the agriculture developed based on wetland protection.It is an artificial agricultural complex ecosystem with the comprehensive development of agriculture,forestry,animal husbandry and fishery,and plays a very important role in promoting the economic development of China.However,with the rapid development of economy and the intensification of human activities,the contradiction between agricultural development and wetland protection is getting bigger and bigger.The irrational development and utilization of traditional wetland agriculture leads to the deterioration of ecological environment quality.Therefore,it is urgent to adjust and optimize the traditional agricultural development mode.This paper selects shengjin Lake wetland of international importance in Chizhou city,Anhui Province as the research object,uses ERDAS9.2 and other software to extract land use data,obtains social and economic data through the statistical yearbook of Chizhou city,summarizes the advantages of wetland biological,agricultural and tourism resources,and finds that the agricultural industry of Shengjin Lake wetland from 1986 to 2020 is dominated by planting industry.The proportion of planting industry continues to decrease,but it still occupies the main proportion.The proportion of industrial structure of wetland forestry in Shengjin Lake showed a rising trend,which was second only to planting industry.The proportion of animal husbandry industry structure grows slowly;The proportion of fishery industry structure fluctuates greatly,increasing from 5.65% in 1986 to 24.45% in 2000 and then decreasing to 11.94% in 2020.The proportion of agriculture,forestry,animal husbandry and fishery services are increasing year by year.The three agricultural development modes of wetland reclamation,purse Seine breeding and sightseeing tourism all promote the economic growth,but they all cause certain damage to the wetland ecological environment.Secondly,the "pressure-state-response"(PSR)model was used to establish the comprehensive evaluation index system of shengjin Lake wetland ecological environment quality.AHP was used to determine the weight of evaluation index.The dynamic changes of shengjin Lake wetland ecological environment quality from 1986 to 2020 were calculated by the comprehensive evaluation index of ecological environment(CEI).It was found that the comprehensive assessment level of ecological environment quality of Shengjin Lake wetland fluctuated from class ⅱ to class ⅳ from 1986 to 2020,and the comprehensive assessment index of ecological environment quality showed a general downward trend.From 1986 to 1994,the decrease of ecological environment quality was small,and the damage caused by reclamation agricultural development mode was relatively small.From 1994 to 2016,the decrease of ecological environment quality was large,and the damage caused by Seine farming agricultural development mode was large.From 2016 to 2020,the ecological environment quality of Shengjin Lake wetland was improved due to the supervision of environmental protection and the total prohibition of purse Seine farming.In 2020,the ecological environment quality grade was ⅲ,and the comprehensive evaluation index of ecological environment quality was 0.427,indicating that the wetland pressure and ecological quality were average.Then,the impacts of agricultural development on wetland in Shengjin Lake were analyzed,including reducing biodiversity,aggravating agricultural environmental pollution,and weakening ecological regulation function.Finally based on the above,the optimization was studied for the rose golden lake wetland agriculture development mode,and put forward the pond and low-lying paddy field ecosystem circulation aquaculture,efficient three-dimensional collection ecological fishery development,development of agricultural tourism chain all three agriculture development model,three kinds of agricultural development in the experimental area,mainly are permitted to bring huge comprehensive benefits,achieve sustainable development,It can promote the transformation and upgrading of traditional wetland agriculture,improve the ecological environment,provide a comfortable and safe habitat for rare migratory birds,and benefit the stability of the ecosystem.It provides important reference value for wetland agricultural development model optimization and ecological environment protection.Shengjin Lake is the only internationally important wetland in Anhui Province.It is of great significance to study how to adjust and optimize the agricultural development mode while protecting the ecological environment to lead the green agricultural development of wetlands in the middle and lower reaches of the Yangtze River.Therefore,a clear understanding of shengjin Lake international important wetland agricultural development mode can provide a theoretical basis for the optimization of wetland agricultural development mode and ecological environment protection,which is conducive to the rational utilization of wetland resources,effective environmental protection,sustainable growth of agriculture,healthy operation of policies and regulations and other goals.