Game Study Of Organic Fertilizer Supply Chain Considering Government Subsidies And Growers’ Green Preferences

Under the double carbon target,China’s agricultural development also faces a major task of emission reduction,however,as a large livestock industry,while the output of livestock and poultry products ranks first in the world,livestock and poultry manure produced by the livestock industry also causes great environmental pollution and greenhouse gas emissions.As the most extensive way of resource utilization of livestock and poultry farming waste,fertilization is to process livestock and poultry farming waste into commercial organic fertilizer and realize resource utilization through market-oriented operation,which not only can "turn waste into treasure",but also has the environmental benefits of improving soil quality,saving energy and reducing consumption.However,in reality,the development of organic fertilizer industry in China faces problems such as uneven quality of organic fertilizer,high cost of production enterprises,low motivation of organic fertilizer production and application.From the perspective of the organic fertilizer supply chain,it can consider the economic benefits and environmental impact,connecting organic fertilizer producers,sellers,growers and other multi-body.Therefore,considering how to improve the quality of organic fertilizer,increase the enthusiasm of each subject,and promote the circulation of organic fertilizer from the perspective of the supply chain is an effective way to solve the real problems of organic fertilizer,which is important to realize the resource utilization of livestock and poultry manure and the green and low-carbon transformation of agriculture.Based on the circular economy theory,Stackelberg game theory and externality theory,this paper takes into account the impact of green preferences of growers on the supply chain and constructs a game model of producers and sellers in the organic fertilizer supply chain under three scenarios: no government subsidy,government subsidy to producers and government subsidy to growers.The equilibrium decisions of the subjects in the supply chain under the three scenarios of government participation and the optimal profit at equilibrium were obtained,and sensitivity analysis was conducted,and the conclusions were tested by numerical simulation using MATLAB software,focusing on the following issues:(1)Considering the impact of growers’ green preferences on the organic fertilizer supply chain,the government,as an external participant,what are the effects between the subjects(organic fertilizer producers,organic fertilizer sellers)in the organic fertilizer supply chain in China?(2)What is the dynamic interaction between organic fertilizer producers and organic fertilizer sellers? What kind of equilibrium decision and optimal profit will be obtained after each player plays in the supply chain?How do the key parameters affect the organic fertilizer supply chain? That is,how do the equilibrium decisions(organic fertilizer quality,wholesale price,retail price)and profits of producers and sellers change with changes in government subsidies and green preferences?(3)How do the green preferences of growers and government subsidies affect the organic fertilizer supply chain differently in each of the three government participation scenarios? The above questions are discussed in order to provide reference and reference for solving the real-life problems of the organic fertilizer industry,promoting the development of organic fertilizer supply chain and formulating relevant incentive policies by the government.Through theoretical analysis,Stackelberg game model and numerical experiments,the research results and conclusions of this paper include the following:(1)The definition of organic fertilizer quality and organic fertilizer supply chain is proposed,and the connotation of "green" is analyzed.(2)In view of the problems in the development of organic fertilizer industry,a dynamic game model of organic fertilizer supply chain is constructed to analyze the impact of key variables on the supply chain and propose countermeasures.(3)First,the green preference of growers is an important factor affecting the development of organic fertilizer supply chain.The quality of organic fertilizer,producer’s profit and seller’s profit will increase with the increase of green preference,and the greater the green preference,the faster the increase.Secondly,only when the green preference is high,i.e.,when growers pay enough attention to the quality and environmental impact of organic fertilizer,the external government subsidy incentive will have a greater effect on the supply chain to achieve both economic and environmental benefits.(4)Government subsidies have a catalytic effect on organic fertilizer supply chain development,but with increasing subsidies,the three types of government participation have different effects on organic fertilizer quality,producer profits,and seller profits.Specifically,the quality of organic fertilizer improves significantly with the increase of government subsidies to producers,but the improvement effect is not good when subsidizing growers;the promotion effect on producers’ profit is that the strategy of subsidizing producers is better when the subsidy is below a certain threshold,and the strategy of subsidizing growers is more effective when it exceeds the threshold;the promotion effect on sellers’ profit is that the strategy of subsidizing producers is better than the strategy of subsidizing growers when the subsidy is increased.The effect on sellers’ profit is that,with the increase of subsidy,the subsidy producer strategy is always better than the subsidy grower strategy.In view of the research content and conclusions of this paper,the corresponding countermeasures are proposed:(1)Accelerate the construction of the green agriculture multi-body cooperation linkage mechanism,promote the construction of organic fertilizer supply chain,and promote the production and circulation of high-quality organic fertilizer and the resource utilization of livestock and poultry waste by strengthening the close ties among the subjects in the supply chain.(2)When formulating relevant incentive policies,the government should take the green preferences of growers as an important policy reference to promote the development of organic fertilizer,pay attention to the improvement of growers’ ecological awareness level,stimulate the purchase and application behavior of organic fertilizer through the improvement of green preferences,and then influence the green production and sales behavior of enterprises in the supply chain to improve the overall efficiency of the organic fertilizer supply chain.(3)Strengthen the government’s support role in the organic fertilizer supply chain,improve the organic fertilizer subsidy policy,and take corresponding effective incentive measures according to the different subsidy targets "according to local conditions".