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| Evaluation of Greenhouse Gas Emission Reduction by Balanced Fertilization in China Using Life Cycle Assessment |
| Received:January 23, 2015 |
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| KeyWord:LCA;balanced fertilization;nitrogen fertilizer use reduction;greenhouse gas emission reduction |
| Author Name | Affiliation | E-mail | | ZHANG Wei-hong | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/The Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing 100081, China | | | LI Yu-e | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/The Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing 100081, China | yueli@ami.ac.cn | | QIN Xiao-bo | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/The Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing 100081, China | | | WAN Yun-fan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/The Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing 100081, China | | | LIU Shuo | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/The Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing 100081, China | | | GAO Qing-zhu | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/The Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing 100081, China | |
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| Abstract: |
| In recent years, China has actively been promoting the technology of balanced fertilization, which has greatly reduced unfavorable effects of fertilization. Studying the effects of this technology on the minimization of nitrogen fertilizer use and the reduction of greenhouse gas emission would provide the basis for establishing inventory of farmland greenhouse gas emissions and proposing measures for agricultural greenhouse gas emission reduction. In this study, data from the relevant literatures was used to estimate the amount of nitrogen fertilizer saving by balanced fertilization. Life Cycle Assessment(LCA) was used to evaluate the reduction of greenhouse gas emissions by balanced fertilization. The amount of emission reduction in farmlands and industrial processes was estimated by the methods used in the 2006 IPCC Guidelines for Nation Greenhouse Gas Inventories and the specific(primary) energy consumption(SEC), respectively. Balanced fertilization reduced the use of nitrogen fertilizers by (27.23±7.42)kg N·hm-2. In 2013, the total emission reduction by balanced fertilization was 25 003 500 tons CO2-e, of which 11 718 300 tons CO2-e was from farmlands. Of farmland sources, 10 142 100 tons CO2-e was direct N2O emission reduction and 1 576 100 tons CO2-e from reduced nitrogen volatilization and leaching/runoff. Industrial processes contributed to the reduction of 13 285 200 tons CO2-e from the conservation of 5 834 500 tons standard coal by reduced nitrogen fertilizer production. Implementing balanced fertilization could reduce nitrogen fertilizer use and thus greenhouse gas emissions. |
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