Correlation Analysis Of Cultivated Land Ecosystem Service Value Estimation And Influencing Factors In Lulong County

The survival and development of human beings are inseparable from the basic resources and conditions of cultivated land.Therefore,it is self-evident to protect the importance of cultivated land.However,with the progress and development of the society,as well as the rapid development of industrialization and urbanization,the quantity and quality of cultivated land has been reduced sharply,which has affected the food security and social stability of our country.China has established the most stringent protection system for cultivated land,and has achieved obvious protective effects,but the phenomenon of damaged arable land and illegal occupation of cultivated land still occurred.The reason is the lack of understanding of the value of cultivated land.Therefore,a comprehensive understanding of the value of cultivated land is the key to change the current situation of farmland constantly.In this paper,the cultivated land in Lulong county was taken as the research object.Combining with the landscape method,the soil,landform and land use status factors were selected as the dominant factors to divide the cultivated land type,and the ecosystem service value of the cultivated land was estimated.Then,the spatial distribution characteristics and the differences of different cultivated land types were analyzed.According to the value estimation model of ecological service function and the related research results and the selection principles,the influence factors of different ecosystem service functions were obtained through analysis.The correlation analysis between different ecological service function values and different ecosystem service function values and influencing factors was made by using plots as units.The gray relational grade model was used to analyze the correlation between different ecosystem services function values and factors,and the correlation degree of each ecosystem service function function and factor was obtained.The first 5 factors of each function correlation degree were extracted,and the ecological software Canoco was used to sort the RDA analysis.Finally,according to the order of the influence factors and the results of the classification of cultivated land,the pertinent countermeasures were put forward.The main conclusions are as follows:(1)The paper used landscape method to get 3 first classes of cultivated land and 25second class of cultivated land.The results of classification showed that the areas of low ground floor cinnamon dry land was the largest,accounting for 26.98%of the total area of cultivated land in Lulong county.The area of high terrain slope brown soil dry land and low ground ground new soil water land area were the smallest,accounting for only 0.09%of the total area of cultivated land in Lulong county.(2)The market pricing method,shadow engineering method and alternative cost method were used to estimate the service value of cultivated land ecosystem.And the order was food production,carbon fixation,oxygen release,water conservation and soil conservation from high to low.From the level of plots,the minimum value of ecological services per unit area of cultivated land was 10280.49 yuan/hm~2,the highest was 38191.58yuan/hm~2.From the angle of cultivated land,the ecological service value of the unit area per unit area of low ground flat soil brown soil water field was 34256.32 yuan/hm~2,and the lowest land gentle slope was 20438.72 yuan/hm~2.In general,the ecological service value of the paddy field was obviously higher than that of the dry land and the irrigated land.The value of the land and slope from low to high was decreasing,and the ecological service value of the brown soil was better than that of the new soil.(3)According to the estimation model of ecological service value and related research results,the influencing factors were extracted to analyze the correlation between ecological services function and factors.In the paper,14,15,8 and 10 factors were selected for food production,carbon sequestration,water conservation and soil conservation,and there was a significant positive correlation between grain production,carbon release,oxygen release,water conservation and other functions,while the remaining functions of the soil maintained a significant negative correlation.The correlation test showed that the relationship between the ecosystem service value and the impact factor was interlaced,so the gray relational degree model was used to calculate the correlation between the ecological service function and the factors.The results showed that the most related factors of food production,carbon sequestration,water conservation and soil conservation were irrigation guarantee rate,organic matter content,effective soil thickness and slope length,and the correlation degree was 0.5482,0.6304,0.4899 and0.5723.According to the influence factor,the value of cultivated land ecosystem service was analyzed by RDA,and the most influential factor of the positive correlation factor was the agricultural crop unit price,and the most influential factor in the negative correlation factor was the slope.Finally,the corresponding countermeasures and suggestions were put forward.The service value of cultivated land ecosystem in Lulong county was estimated and the influence factors were analyzed.The service value of cultivated land ecosystem in the study area was clarified,which was beneficial to the protection of cultivated land and the promotion of ecological value,and it also provided a theoretical basis for the development of cultivated land ecological construction.