利用静态暗箱—气相色谱法,周年监测集约化菜地四种蔬菜种植过程中N2O的排放和蔬菜产量变化,探究减氮(640、960 kg hm-2 a-1)以及施用硝化抑制剂氯甲基吡啶(CP)对菜地N2O排放的影响。结果表明,与常规施氮(Nn)处理相比,减量施氮(Nr)在不显著降低产量的情况下平均降低菜地N2O排放27.1%;与仅施用尿素的处理相比,在减量和常规施氮水平的基础上添加硝化抑制剂又分别能降低菜地N2O排放总量29.4%、26.0%,降低N2O排放系数60.9%、42.4%,而对蔬菜产量没有显著影响,因此显著降低菜地单位产量N2O排放量32.1%、30.3%,以减氮结合CP(CP-Nr)处理减排效果最佳。因此,减氮结合CP应用于集约化蔬菜生产是一种有效的菜地减排农业措施。
【英文摘要】
【Objective】 A one-year-round field experiment,monitoring nitrous oxide(N2O)emissions during the growing seasons of four consecutive vegetable crops and yields of the crops,was conducted to investigate effects of reduced application of nitrogen(N)fertilizer and application of chlorinated pyridine(CP),a kind of nitrification inhibitor,on N_2O emission and vegetable yield. 【Method】 During the observation period from May,2015 to May,2016,four different species of vegetables were cultivated one by one,namely,ama...
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