Research On Green Economic Efficiency And Influencing Factors Of South American White Shrimp Farming In China

South American white shrimp is currently one of the most important economic shrimp in the world,and China is the main country for farming South American white shrimp.While China’s South American white shrimp aquaculture industry has made great strides in development,the crude aquaculture model has also resulted in a huge waste of resources,causing irreversible effects on the environment and seriously limiting the sustainable development of the industry.In recent years,China’s Party Central Committee for green development and the importance of ecological civilization is constantly strengthening,to protect the ecological environment of fish farming waters,to achieve the ecological benefits of fish farming and economic benefits of the common development of the urgent requirements of the current green development of China’s fisheries.Then,in China’s South American white shrimp aquaculture industry,how to achieve the transformation and upgrading of the shrimp aquaculture industry,to promote its healthy and sustainable development,the South American white shrimp aquaculture industry has a very important significance.In this paper,economic efficiency as well as green economic efficiency were measured using DEA-SBM model for the three provinces of South American white shrimp farming in China from 2016 to 2021.In terms of economic efficiency,the efficiency from high to low was Guangdong province、Shandong province and Jiangsu province,with little difference in economic efficiency between Shandong and Guangdong provinces.The material balance method was used to calculate the amount of nitrogen and phosphorus pollution from the farming of South American white shrimp in each province,and the amount of nitrogen(N)and phosphorus(P)pollution generated during the farming process in the three provinces were,from high to low,Jiangsu Province 、Guangdong Province and Shandong Province,and the green economic efficiency was,from high to low,Shandong Province 、Guangdong Province and Jiangsu Province,but the difference between Guangdong Province and Shandong Province in terms of green economic efficiency was not significant.The main reason for this result is the different farming methods used in the three provinces,Jiangsu Province mainly adopts the earthen pond culture mode,this mode of culture,the survival rate of shrimp is lower,the amount of nitrogen and phosphorus transferred to the shrimp body is less,so the pollution is more serious.The high pond culture model used in Guangdong Province and the factory farming model used in Shandong Province both apply modern farming equipment and use more scientific feeding methods,so the economic efficiency and green economic efficiency are higher.Through further analysis,no matter which farming region its green economic efficiency as a whole is lower than its economic efficiency,green economic efficiency has a lot of room for improvement.In the section of exploring the influencing factors of green economic efficiency,the green economic efficiency of South American white shrimp farming calculated by the DEA-SBM model using the random effects Tobit model was measured by regression analysis.After the empirical analysis,it was found that the years of education of farmers and the degree of technical services received by farmers had a positive effect on green economic efficiency,and the longer the years of education and the higher the degree of technical services received,the stronger the effect on green economic efficiency.The average annual income of farmers and the number of aquatic technicians also have a positive effect on green economic efficiency,but not to a great extent.The average age of farmers,the number of integrated aquatic technology stations,and investment funds do not have an impact on green economic efficiency.Finally,based on the above findings,we suggest the following recommendations:(1)Promote the high pond culture model.(2)Conduct training on farming techniques and establish green farming demonstration bases.(3)Strengthen the supervision of discharge and improve the enforcement of punishment.