Study On Large-scale Livestock And Poultry Breeding Model Based On Life Cycle Assessment

As China’s economy continues to improve, more and more livestock products appear in the residents’daily diet. With the rapid development of livestock and poultry breeding industry and the scale of livestock and poultry breeding, we have to face the pollution caused by livestock and poultry breeding. Exploiting life cycle assessment to comprehensively assess the large-scale livestock and poultry breeding, we can qualitatively and quantitatively analyze the environmental influence of large-scale livestock and poultry breeding’s life cycle and discuss on the advantages of livestock and poultry breeding mode, in order to provide reference for the existing, in the construction and planning of livestock and poultry farms.Although the life cycle assessment of short development time, but as an advanced environmental management tool, is widely accepted by everyone. With investigating three indicators:geographical location, breeding technology and environmental impact, and six sub indicators:the livestock and poultry carrying capacity of the cultivated land, the annual productivity of sows, mortality, economic benefits, eutrophication, global warming and environmental acidification, this paper makes a detailed comparison of representative the life cycle of livestock and poultry farms, to analysis which kind of breeding model has more development in the local, more profitable opportunities and to meet the requirements of social sustainable development. This paper apply nitrogen nutrient balance method in geographical position, the equivalent factor method in quantifying environmental influence load, the efficacy coefficient method in removing indicator dimension, analytic hierarchy process (AHP) in determining the index weight.Conclusions are as follows:1, the value of the livestock and poultry carrying capacity of the cultivated land of NingHai large-scale livestock and poultry farms is 0.32, the value of geographical location is 7.056; the value of the livestock and poultry carrying capacity of the cultivated land of Xiaoshan large-scale livestock and poultry farms is 0.51, the value of geographical location is 4.82; which shows that the Ninghai breeding model has a greater development space.2, Ninghai large-scale farming sow productivity is 21.58, the mortality rate is 2.98%, the economic benefit is-290.08 yuan/FU, breeding technology evaluation value is 7.995; Xiaoshan large-scale farming sow productivity is 20.08, the mortality rate is 6.9%, the economic benefit is 4694.03 yuan/FU, breeding technology evaluation value is 19.91; which shows that Xiaoshan farming mode has better profitability.3, About Ninghai large-scale farms, the value of the eutrophication of is 4.34, the value of the global warming is 8290, the value of the environmental acidification is 37.04, and the value of environmental impact assessment is 53.488.4, The comprehensive evaluation value of large-scale farms in Ninghai is 68.539, and Xiaoshan is 63.53, which indicated that the Ninghai large-scale breeding model is superior to that of Xiaoshan.According to the results, we put forward the following suggestions:first, the planning and construction of large-scale livestock and poultry farms should set up in the area which the livestock and poultry carrying capacity of the cultivated land is small. Second, for all the large-scale farms should adopt the anaerobic fermentation technology to deal with the waste of livestock and poultry. Again, the research on the process of breeding should be strengthened, to raise the growth rate of livestock and poultry to reduce the pollutant emission. Finally, fertilizer manufacturing processes need to be further studied to reduce pollutant emissions during fertilizer production, and to reduce the amount of fertilizer using in the process of cultivation of feed materials.