Research On The Calculation Of Farmland Ecosystem Service Value Based On The Evaluation Of Cultivated Land Quality

At present,with the proposal of the concept of ecological civilization,there is a deeper requirement for the necessity and importance of the protection of cultivated land.Quantifying the value of ecosystem services and using the concept of currency to reflect the value of ecosystem services not only intuitively reflect the important role of the functions of cultivated land ecosystems,but also arouse the attention and protection of cultivated land ecosystems from all walks of life,and help people to provide All kinds of services generate intuitive understanding.This thesis takes Meihekou City,Jilin Province as the research object.After fully combing the existing research results,earnestly investigating and obtaining land change survey data,cultivated land quality update data,land remediation project data and other data,through field visits,Based on field survey sampling,combined with literature data method,spatial analysis method and comparative analysis method,etc.,based on the results of comprehensive quality evaluation of cultivated land,through the introduction of ecosystem service value theory,the integration of cultivated land quality evaluation and ecological value service was constructed.A set of county-scale farmland ecosystem service value calculation methods that fit the actual situation of Meihekou City,and calculate the value of its farmland ecosystem service value.Based on the calculation results,the distribution law of Meihekou city ecosystem service value and its influencing factors are analyzed and discussed And use this method to evaluate the effect of land remediation,highlight the effect of remediation and its ecological impact.The main conclusions are as follows:(1)The total value of farmland ecosystem services in Meihekou City is 2.789billion CNY,the average unit price of farmland ecosystem services is 22830 CNY/hm~2,and the unit value of farmland ecosystem services is divided into 4 intervals,the value of farmland ecosystem services per unit area The most cultivated land is in the range of22000-24000 CNY/hm~2,accounting for 51.94%of the city’s cultivated land area;followed by the cultivated land valued at 20,000-22,000 CNY/hm~2,the area can reach44686.29m~2,accounting for 36.40%of the city’s cultivated land area The cultivated land with a unit area value of less than 20,000 CNY/hm~2 is the least,with only4,397.72hm~2,accounting for 3.86%of the city’s cultivated land area.(2)The unit price of farmland ecosystem service value after revision has changed to varying degrees.The farmland ecosystem service value has regional differences after being corrected by the comprehensive quality index of cultivated land,and the revised results are more in line with regional actual conditions.The service value of farmland ecosystem per unit area is distributed in a zonal manner.The distribution characteristics are generally consistent with the distribution characteristics of Meihekou City’s land form,altitude,hydrology and other factors.(3)Evaluation of land remediation projects through the model,the results show that the total value of farmland ecosystems increased by 812,200 CNY.In the current land remediation projects,three measures are ecological protection,soil remediation,channel repair and road repair It is the most significant engineering measure that has an impact on farmland ecosystems.The comprehensive evaluation of cultivated land quality through remediation projects has significantly increased,and as a correction factor,the value of ecosystem services has been significantly improved.Therefore,the effect of increasing the value of ecosystem services per unit area is better than that of agricultural use.Evaluation index system of land classification.