Economic And Ecological Benefit Evaluation Of Typical Open-field Vegetable Production In Xinmin Town, Panzhou Cit

In recent years,the high environmental cost and ecological sustainability of intensive vegetable production in China had become more and more prominent.Quantitative research of the economic characteristics and ecological performance of typical vegetable production in specific regions had important practical significance for the green and efficient management level of the garden and the sustainable development potential of ecological economy.This research based on the survey data of the Guizhou Xinmin town five kinds of typical characteristic open vegetables（cabbage,ginger,radish,pepper,eggplant）production actual material input and output in 2021 under the peasant household management mode,and comprehensively utilize the cost-benefit analysis method,carbon footprint accounting method,and emergy value analysis method,respectively to evaluate different open vegetable production ecology,economic benefits in the Xinmin town,and combined with the evaluation results discusses,the key influencing factors restricting the sustainable development of ecological economy of local small farmers’open vegetable production mode were discussed,and finally the optimization scheme of emission reduction and efficiency increase was proposed.The main conclusions were summarized as follows:（1）The analysis of economic benefits showed that the farmers could obtain considerable benefits when they choose vegetables with characteristic advantages to planting.The cash income per 667m² cabbage,ginger,radish,pepper and eggplant production were 1,875.52,3,100,1,944.36,2,340 and 1,925.55 CNY respectively.the cost were 441.66,933.51,314.56,578.06 and 403.52 CNY,respectively,and the chemical fertilizer expenditure contributed the most.（2）The ecological benefit analysis showed that the ecological benefits of the production of Chinese cabbage,ginger,radish,pepper and eggplant were low which were manifested as high carbon emission and low resource utilization efficiency.The carbon emissions per 667m² were 695.6,748.0,531.9,671.6 and 631.0 kg CO₂ eq,respectively,with the average reaching 655.6 kg CO₂ eq.The total emergy input of each vegetable production systems were greater than the emergy output,and the conversion rate of the emergy per unit product were 1.43E+05 sej/J,1.80E+05 sej/J,9.69E+04 sej/J,1.97E+05 sej/J and 2.50E+05 sej/J,respectively,with low production efficiency and resource utilization level.Combined with carbon footprint and emergy results,the ecological efficiency of five typical open-field vegetable production systems were 5.21E-05,1.33E-05,1.15E-04,1.37E-05 and 2.07E-05,respectively,which showed obvious high environmental cost characteristics.（3）The analysis of the ecological and economic sustainable development potential showed that in Xinmin Town under the management mode of farmers,chemical nitrogen fertilizer was the most critical sensitive factor affecting the carbon emission and resource utilization efficiency.The sensitive coefficients were 0.29640,0.40734,0.19077,0.31611 and 0.17958,respectively,which were significantly higher than the other input.According to the scientific recommended nitrogen application standard of vegetables garden,two optimization scenarios of reducing chemical nitrogen fertilizer input and replacing organic fertilizer were designed to reduce carbon emission and emergy conversion rate,to improve the ecological efficiency of each vegetable production systems.Therefore,guiding farmers to change their traditional fertilization habits,to reduce the amount of fertilizer and to adjust the input ratio of organic nitrogen and chemical nitrogen reasonably were important measure promoting the regional open-field vegetable productions’economy and ecological coordinated and sustainable development.