Research On Optimizing The Layout Of Livestock And Poultry Industry In Heilongjiang Province Based On Environmental Carrying Capacity

General Secretary Xi Jinping emphatically emphasized that ecology is resources and ecology is productivity,and the development of the Northeast depends on the mountains and waters.With the economic and social development,the improvement of the living st andards of the people,and the adjustment of the diet structure,the sharp increase in the demand for meat has led to the rapid development of the livestock and poultry breeding industry and the pollution of livestock and poultry breeding has become a prominent problem.Under the background of vigorously promoting the development of green agriculture,with the introduction of the prohibition policy,the trend of raising pigs in the south and in the north has become increasingly apparent.Under the guidance of the policy,the provinces in the Northeast have vigorously undertaken the transfer of industries in the south.The development of green and sustainable agriculture is crucial.Based on the theory of regional environmental carrying capacity,nutrient bal ance,and comparative advantage,this article relies on the development of animal husbandry in Heilongjiang Province,combines the characteristics of animal husbandry in various cities,summarizes and analyzes the layout of the animal husbandry in Heilongj iang Province,and changes in agglomeration.The problem.Then based on the principle of nitrogen and phosphorus nutrient balance,combined with time and space to calculate the environmental carrying capacity index of livestock and poultry breeding in 13 cities in Heilongjiang Province from 2009 to 2018,dynamically analyze the changes in the time series of the environmental carrying capacity of livestock and poultry breeding in each city,and analyze the trend of each city.Changes in total livestock and poultry farming and theoretical maximum farming.On this basis,an environmental comprehensive comparative advantage index is constructed from both production and environmental aspects.Based on comprehensive factors of environmental carrying capacity,the strong environmental comprehensive comparative advantage areas and environmental comparative comparative disadvantage areas of animal husbandry in Heilongjiang Province are calculated.Layout optimization provides policy recommendations.The research results show that:(1)The regional layout of animal husbandry in Heilongjiang Province is mainly concentrated in the central and western regions of our province;the layout of animal husbandry has problems such as uneven regional distribution,low scale,and h igh environmental protection pressure.(2)In the past ten years,based on the calculation of nitrogen balance,14.62% of the regions were overloaded,mainly concentrated in Harbin,Shuangyashan,Daqing and Suihua.Nearly 50% of the regions not overloaded have a trend of annual decline,which requires urgent attention and adjusting prevention;phosphorus balance calculation,40.77% of the area is overloaded,and nearly 50% of this area is improving year by year.In 2018,the environmental carrying capacity of livestock and poultry farming in Heilongjiang has improved significantly.Only Suihua,Daqing and Mudanjiang have overloaded.(3)The differences in production comparative advantages across cities in Heilongjiang Province are small,and environmental comparative advantages play a decisive role;the comprehensive comparative advantages of strong environment,the comparative comparative advantages of weak environment,and the comparative comparative disadvantage of environment are concentrated in eastern a nd northern,central,and southwestern Heilongjiang Province,respectively;The cities with strong comparative advantages in the environment are Jiamusi,Jixi,Shuangyashan and Daxinganling,and the cities with comparatively inferior environment are Suihua,Daqing,Mudanjiang,and Qiqihar.Proposed layout adjustment strategies are targeted.(4)Technical Guide for the Calculation of Livestock and Poultry Manure Polluted Land Carrying Capacity should increase the scale,technology innovation and technology promotion indicators to improve and be more practical.