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中文摘要：
采用预设取样器和静态箱气相色谱法，对渗滤液灌溉条件下，土柱土壤不同深度剖面 N2O的浓度以及N2O和CO2的表面释放通量进行了监测.结果表明： 渗滤液灌溉可促进N2O的生成和释放，灌溉后24 h内土柱N2O的释放通量与表土下10 cm（r=0.944,P〈 0.01）、20 cm（r=0.799,P〈0.01）、30 cm（r=0.666,P〈0.01）和40 cm（r=0.482,P〈0.05）处所生成的N2O浓度呈显著相关，且相关程度依次递减.渗滤液灌溉还促进了CO2的释放，但N2O与CO2释放通量之间无显著相关性（P〉0.05）.渗滤液的灌溉负荷主要决定温室气体释放总量的强弱（N2O和CO2，以CO2当量计），灌溉负荷为6 mm·d^-1条件下温室气体释放总量为灌溉负荷2 mm·d^-1的3倍多.采用表土下20 cm处灌溉方式可比表土下10 cm处灌溉方式削减47%的温室气体释放总量.渗滤液灌溉土壤14 d内，N2O释放量约占温室气体释放总量的57.0%～91.0%.
英文摘要：
By using prefabricated probe and static chamber, the N2O concentration at different depths along the soil columns irrigated by landfill leachate as well as the N2O and CO2 fluxes were determined. The results showed that leachate irrigation could promote the N2O emission. Within the first 24 hours after irrigation, the N2O fluxes from the soil columns were significantly correlated with the N2O concentrations in the columns at the depths of 10 cm （r =0. 944, P 〈0. 01 ） , 20 cm （r = 0.799, P〈0.01）, 30cm （r=0.666, P〈0.01）, and 40 cm （r=0.482, P〈0.05）, and the correlation decreased along the depths. Landfill leachate irrigation also promoted the CO2 emission from the soil columns. There was no significant correlation between the emissions of N2O and CO2 （ P 〉 0. 05 ）. The irrigation loading of landfill leachate had a predominant effect on the total greenhouse gas emissions （including N2O and CO2 fluxes, based on CO2-equivalent emissions）. When the irrigation loading was 6 mm·d^-1, the total greenhouse gas emissions from the soil columns were 2 times higher than those when the irrigation loading was 2 mm ·d^-1. 47% of the total greenhouse gas emissions were reduced from the soil columns when the leachate irrigation depth was at 20 cm, compared with the depth being at 10 cm. Within the 14 days under leachate irrigation, 57.0%-91.0% of the total greenhouse gas emissions were originated from N2O emission.
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