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本研究利用投入产出法的理论和方法,研究了北京地区主要农作模式的碳投入、产出及碳效益情况。结果表明:氮肥和电能在总碳投入中占较大比重,达70%～90%;蔬菜类作物的碳投入远大于非蔬菜类作物,设施蔬菜模式的碳投入分别比麦-玉两熟、春玉米一熟、春花生一熟模式高80.4%、92.0%、94.3%,其余模式间差异较小。春玉米易于田间施肥等管理,资源利用率较高,其碳效益最高,为4.59;春玉米一熟模式的碳效益分别比麦-玉两熟、春花生一熟、蔬菜模式高30.8%、8.31%、96.8%。因此,北京地区种植春玉米有利于减少农田碳排放。
In this study, using the theory and method of input-output method, this paper studied the carbon investment, output and carbon benefits of the main agricultural modes in Beijing. The results showed that nitrogen and electricity accounted for 70% -90% of the total carbon input. The carbon investment of vegetable crops was much larger than that of non-vegetable crops, and that of vegetable vegetables was higher than that of wheat- One-year spring maize, spring peanut ripe mode high 80.4%, 92.0%, 94.3%, the remaining differences between the smaller mode. Spring maize was easy to manage in the fields such as fertilizing, with higher resource utilization rate and the highest carbon efficiency of 4.59. The carbon efficiency of the spring maize-one-ripening pattern was higher than that of the wheat-maize double-ripening, the spring peanut first-ripening and the vegetable pattern by 30.8% and 8.31 %, 96.8%. Therefore, planting spring maize in Beijing is conducive to reducing farmland carbon emissions.