为综合分析小麦蚕豆间作的环境酸化效应以及产量优势,通过2个试验点为期2年(A和B试验点:2014—2016年)的田间定位试验,分析比较了小麦蚕豆间作产量以及基于生命周期评价(Life cycle assessment,LCA)的能源消耗、环境酸化等指标的差异。结果表明,两个试验点的间作小麦产量均显著高于单作,平均增幅达到了22.04%,土地当量比(LER)均大于1,表现出明显的间作优势。与单作小麦相比,间作小麦的能源消耗和环境酸化影响指数较单作小麦分别平均减少了18.59%和17.45%,硫氧化物(SOX)、氨气(NH3)和氮氧化物(NOX)酸化气体分别平均减少了17.42%、17.68%和17.82%,间作小麦的能源消耗和环境酸化的环境影响减缓潜力平均增加了18.96%和17.45%。表明小麦蚕豆间作可显著提高产量,减少酸化气体排放,具有明显的间作优势。
This study was to comprehensively analyze effects of wheat and faba bean intercropping in wheat fields on environmental acidification and yield of the crops. Two two-year field experiments,(A and B), were carried out and analysis of the results of the experiments done for effects of wheat and faba bean intercropping on crop yield, energy consumption and environmental acidification based on LCA (life cycle assessment) by comparison. Results showed that in the two experimental fields, intercropped wheat was significantly of 22.04% higher than mono-cropped one in yield on average with land equivalent ratio (LER) being higher than 1, showing obvious intercropping advantage. Compared with monocropped wheat, intercropped wheat decreased by 18.59% and 17.45% in energy consumption and environmental acidification index, respectively, and by 17.42%, 17.68% and 17.82% in emission of SOX, NH3 and NOX, respectively, and hence was 18.96% and 17.45% higher in potential of mitigating the environmental impact of energy consumption and environmental acidification of wheat cultivation. In conclusion, wheat and faba bean intercropping can significantly increase yield of the wheat and reduce emission of acidified gases, which are obvious intercropping advantages.
Acta Pedologica Sinica
Wheat and faba bean intercropped
Environmental acidification potential
Acidified gas emission
Life cycle assessment (LCA)