[Integrated evaluation of circular agriculture system: a life cycle perspective].
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 11 543.26 g (CO2 eq), 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.
Circular Agriculture Research Center, China Agricultural University, Beijing 100193, China. txws0109@126.com
Long
L
Liang
Yuan-Quan
YQ
Chen
Wang-Sheng
WS
Gao
D000383:Agriculture; D000397:Air Pollution / Q000517:prevention & control*; D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis*; D002681:China; D003247:Conservation of Natural Resources; D004372:Ducks / Q000254:growth & development; D004467:Economics; D004787:Environmental Pollution / Q000517:prevention & control*; D017752:Greenhouse Effect; D006801:Humans; D008018:Life Cycle Stages
D002245:Carbon Dioxide