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| Emergy-value analysis on pattern of circular agriculture industry alliance in Changting County |
| LUO Xuhui1,2, HUANG Ying3, FANG Yunyun4, CHEN En1, YANG Youquan1, WENG Boqi1 |
1. Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences/Fujian Key Laboratory on Ecological Processes of Hilly Agriculture in Red Soil Region, 350013, Fuzhou, China;
2. Observation Station of Agricultural Environment by Chinese Agricultural Ministry, 350013, Fuzhou, China;
3. Institute of Agricultural Economics and Scientific Technical Information, Fujian Academy of Agricultural Sciences, 350003, Fuzhou, China;
4. Hangzhou No. 14 Middle School, 310006, Hangzhou, China |
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Abstract [Background] Promoting soil fertilization is an important subject in Changting County for soil and water conservation. Aimed to reusing agricultural waste products and return to farmland, a pattern of circular agriculture industry alliance was established.[Methods] In order to evaluate the pattern application effectiveness and analyze the characteristics of energy flow in recycling agriculture model, the emergy yield ratio (EYR), emergy invest ratio (EIR), environmental loading ratio (ELR) and emergy-value sustainable development index (ESI) in both of circular agriculture industry alliance and local agricultural system (CK) in Changting County were analyzed by emergy-value, with the emergy transformity referring to study of H. T. Odum.[Results]The EYR, EIR, ELR and ESI of circular agriculture industry alliance in Changting County in 2014 were 7.12, 49.35, 0.44 and 16.26, respectively. While the EYR, EIR, ELR and ESI of local agricultural system were 1.20, 3.29, 0.23, and 5.17, respectively. With production pattern changed from traditional one, the percentage of the renewable organic emergy (R1) to the total emergy input increased from 58.42% to 66.47%, the percentage of the nonrenewable industrial auxiliary emergy (F) increased from 18.49% to 30.32%, and percentage of renewable environmental resources (R) decreased from 22.95% to 1.88%. For emergy output, two product systems were typed with heavy animal production, and their emergy outputs were above 75% of total output.[Conclusions] Circular agriculture industry alliance pattern has obvious benefit on agriculture development with increasing 5.92 of EYR and 11.09 of ESI, it is greater than local agricultural system. It is suggested that optimization on circular agriculture industry alliance mode as following:1) making limitation on livestock production;2) enlarging scale of organic fertilizer production;3) introducing more vegetable plantation and orchard to join the alliance for using biogas; and 4) strengthening science and technology investment to make fully use of biogas and fermented liquid.
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Received: 13 December 2016
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