农业环境科学学报Issue(4)：809-817,9.DOI:10.11654/jaes.2015.04.029
陕西关中地区冬小麦-夏玉米轮作系统生命周期评价
Life Cycle Assessment of Winter Wheat-Summer Maize Rotation System in Guanzhong Region of Shaanxi Province
摘要
Abstract
Winter wheat-summer maize rotation system is the most common rotation planting system in Guanzhong Region of Shaanxi Province. In this study, the environmental impacts(including energy consumption, land utilization, water utilization, global warming, acidifi-cation, eutrophication, water toxicity, soil toxicity, and human toxicity)of this system were evaluated by using life cycle assessment(LCA), on the basis of 1 ton of grain production. The primary data were collected from Fuping County and Yangling District of Guanzhong Region with different tillage practices. Results indicated that the ecological-environmental impact index was 0.166 9 and 0.378 8 for Fuping and Yangling, respectively. The dominating potential impact factors on the environment in two locations were different. In Fuping, eutrophication was the primary factor, whereas water toxicity was the main potential factor in Yangling. In the winter wheat-summer maize rotation system, eutrophication, water toxicity and acidification were the major risks to the ecological environment, and their impact indexes were respectively 0.078 3, 0.020 2 and 0.016 4 in Fuping, and 0.110 5, 0.214 1 and 0.023 2 in Yangling. Irrational fertilization and excessive insecticide spray led to the environmental loads in the winter wheat-summer maize rotation system in the Guanzhong Region.关键词
生命周期评价/冬小麦-夏玉米轮作/关中地区Key words
life cycle assessment/winter wheat-summer maize rotation/Guanzhong Region分类
资源环境引用本文复制引用
彭小瑜,吴喜慧,吴发启,王效琴,佟小刚..陕西关中地区冬小麦-夏玉米轮作系统生命周期评价[J].农业环境科学学报,2015,(4):809-817,9.基金项目
“十二五”国家科技支撑项目 （）
