Total embodied energy requirements and its decomposition in China's agricultural sector
Humanity faces the important challenge of understanding and integrating human and natural processes, including agriculture. In China, the scarcity of arable land (0.09Â ha per capita), increasing population, and migration of the workforce to cities pose a significant challenge for food security. Agricultural energy productivity has therefore become a key concern. In this study, we used input-output analysis to measure energy productivity at a national agro-ecosystem scale for China using the total embodied energy requirement (TEER) to reveal hidden energy flows. We introduced a structural decomposition technique that reveals how changes in TEER for the agricultural sector were driven by changes in energy-use technology and the inter-relationships among two agricultural sectors (farming and animal husbandry). The results will help both policymakers and farmers to improve the efficiency and environmental compatibility of agricultural production. Declining TEER for both sectors means that China's overall agro-ecosystem has increased its energy productivity since 1978 due to improved relationships between the agricultural sectors and increased use of biological energy. However, the net positive energy income decreased in the farming sector and an increasing proportion of fossil energy use, accompanied by increased energy income in the animal sector, provide incentives to increase yield and decrease labor by using more fossil energy, thus raising more animals in the animal husbandry sector. Overuse of fossil energy since 1990 has resulted in decreasing fossil energy efficiency, requiring immediate measures to improve the use of fossil-fuel-intensive materials such as fertilizers.
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- Bicknell, Kathryn B. & Ball, Richard J. & Cullen, Ross & Bigsby, Hugh R., 1998. "New methodology for the ecological footprint with an application to the New Zealand economy," Ecological Economics, Elsevier, vol. 27(2), pages 149-160, November.
- Mayumi, Kozo, 1991. "Temporary emancipation from land: from the industrial revolution to the present time," Ecological Economics, Elsevier, vol. 4(1), pages 35-56, October.
- Bonny, Sylvie, 1993. "Is agriculture using more and more energy? A French case study," Agricultural Systems, Elsevier, vol. 43(1), pages 51-66.
- Karkacier, Osman & Gokalp Goktolga, Z. & Cicek, Adnan, 2006. "A regression analysis of the effect of energy use in agriculture," Energy Policy, Elsevier, vol. 34(18), pages 3796-3800, December.
- Pervanchon, F. & Bockstaller, C. & Girardin, P., 2002. "Assessment of energy use in arable farming systems by means of an agro-ecological indicator: the energy indicator," Agricultural Systems, Elsevier, vol. 72(2), pages 149-172, May.
- Uhlin, Hans-Erik, 1998. "Why energy productivity is increasing: An I-O analysis of Swedish agriculture," Agricultural Systems, Elsevier, vol. 56(4), pages 443-465, April.
- Hubacek, Klaus & Giljum, Stefan, 2003. "Applying physical input-output analysis to estimate land appropriation (ecological footprints) of international trade activities," Ecological Economics, Elsevier, vol. 44(1), pages 137-151, February.
- Wang, Qingbin & Halbrendt, Catherine & Johnson, Stanley R., 1996. "Grain Production and Environmental Management in China's Fertilizer Economy," Staff General Research Papers Archive 994, Iowa State University, Department of Economics.
- Hatirli, Selim Adem & Ozkan, Burhan & Fert, Cemal, 2005. "An econometric analysis of energy input-output in Turkish agriculture," Renewable and Sustainable Energy Reviews, Elsevier, vol. 9(6), pages 608-623, December.
- Swanton, Clarence J. & Murphy, Stephen D. & Hume, David J. & Clements, David R., 1996. "Recent improvements in the energy efficiency of agriculture: Case studies from Ontario, Canada," Agricultural Systems, Elsevier, vol. 52(4), pages 399-418, December.
- Thi Anh Tuyet, Nguyen & Ishihara, Keiichi N., 2006. "Analysis of changing hidden energy flow in Vietnam," Energy Policy, Elsevier, vol. 34(14), pages 1883-1888, September.
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