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| Assessment of the environmental impact of seed maize production in oasis agriculture of arid regions based on the life cycle assessment method:A case study of Zhangye City |
| Received:March 23, 2017 |
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| KeyWord:life cycle assessment;arid oasis agriculture;environmental impact;seed maize |
| Author Name | Affiliation | E-mail | | YANG Xiao | School of Economics, Lanzhou University, Lanzhou 730000, China | | | ZHONG Fang-lei | School of Economics, Lanzhou University, Lanzhou 730000, China
Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China | flzhong@lzb.ac.cn | | GUO Ai-jun | School of Economics, Lanzhou University, Lanzhou 730000, China | | | WANG Qiong | Lanzhou Central Branch, The People's Bank of China, Lanzhou 730000 | |
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| Abstract: |
| Based on the input-output survey of the Zhangye Municipal Bureau of Statistics, a survey was conducted to determine the environmental impact of seed maize production using the life cycle assessment method. The first step was to identify the evaluation objectives and scope, consider the two stages of agricultural production, and determine the production boundaries. The second step was an inventory analysis of irrigation water in the life cycle assessment list and a consideration of resource consumption and environmental emissions. The third step assessed the impact of evaluation and analysis, listed all material characteristics, performed standardization, and calculated the environmental impact index. The fourth step explained the results of the life cycle assessment. The comprehensive impact indices of the seed maize environment in the three counties of Zhangye were 0.608 0, 0.538 1, and 1.259 5. Significant effects of the production and application of chemical fertilizers were observed on the environment. Fresh water consumption was higher than in North China and the Guanzhong Region of Shaanxi Province, and a higher environmental pollution index was obtained when crop rotation was implemented. In view of these findings, it is proposed that agricultural technical guidance be increased, soil testing and fertilization be promoted, the farming system be altered, and the planting structure be adjusted in areas where climate and production conditions permit. |
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