| For the point of view that recycling economy system is one of ways to achieve the low-carbon economy,we have made an evaluation on a typical circular agriculture duck industry in Hunan Province,China,through improving the framework of life cycle assessment (LCA).The analysis indicated that the consumption of non-renewable resources,land and water were 48.629 MJ,2.36 m2 and 1 321.41 kg,while the potential greenhouse gas(GHGs),acidification,eutrophication,human toxicity,freshwater ecotoxicity and terrestrial ecotoxicity were 11543.26 g(CO2eq),52.36g(SO2eq),25.83g(PO4eq),1.26,60.74 and 24.65 g(1,4-DCBeq),respectively.The potential damage of aquatic eutrophication,freshwater ecotoxicity and terrestrial ecotoxicity was more serious than that of GHGs.Main results were following: i.the circular agricultural chain promoted the principle of “moderate circulation”,which based on the traditional production methods; ii.circular agriculture could not blindly pursue low carbon development.Instead,soil and biological carbon sequestration should be considered,in addition to reducing carbon emissions; iii.circular economy and circular agriculture should take other potential environmental impacts into account such as acidification,eutrophication and ecotoxicity,with the exception to carbon emissions,to developed integrated system assessment; iv.LCA could provide a comprehensive assessment of circular agriculture,and it was worth of further study. |
