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当前位置: 首页 > 文章 > 菜田氮素反硝化损失与N _2O排放的定量评价 园艺学报 2004,31 (6) 762-766
Position: Home > Articles > Denitrification Loss and N_2O Emission from Nitrogen Fertilizer Applied to Vegetable Field Acta Horticulturae Sinica 2004,31 (6) 762-766

菜田氮素反硝化损失与N _2O排放的定量评价

作  者：
丁洪;王跃思;项虹艳;李卫华1
单  位：
福建省农业科学院土壤肥料研究所;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室
关键词：
菜田;氮肥;反硝化;氧化亚氮
摘  要：
在田间条件下,应用原状土柱培养-乙炔抑制法测定蔬菜地氮肥反硝化损失和N2O排放量。结果表明,在茄子-灰泥土系统中,不施氮肥处理下,土壤氮素反硝化损失量和N2O排放量分别为N22.8kg·hm-2和N8.2kg·hm-2;施氮肥处理下,反硝化损失量和N2O排放量都极显著提高,分别达N37.9和N33.8kg·hm-2;氮肥反硝化损失量占施肥量的5.1%,产生的N2O排放量占施肥量的8.6%。土壤氮素反硝化损失量和N2O排放量与土壤水分含量极显著相关,而与土壤中铵态氮和硝态氮含量的相关性不显著。
译  名：
Denitrification Loss and N_2O Emission from Nitrogen Fertilizer Applied to Vegetable Field
作  者：
Ding Hong 1, 2 ,Wang Yuesi 2,Xiang Hongyan 1, and Li Weihua 1( 1Institute of Soil and Fertilizer, Fujian Academy of Agricultural Science, Fuzhou 350013, China; 2State Key Laboratory of Atmospheric Boundary Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China)
关键词：
Vegetable field; Nitrogen fertilizer; Denitrification; Nitrous oxide
摘  要：
A field experiment was conducted to measure denitrification loss and N 2O emission from nitrogen fertilizer applied to a field grown with eggplants by soil core incubation-acetylene inhibition method. The results showed that the amount of N 2 O emitted from soil (without N fertilizer applied) was N 8.2 kg·hm -2 , while the amount of N 2O derived from applied N fertilizer was N 25.6 kg·hm -2 (8.6 % of applied N).The corresponding figures for denitrification losse were N 22.8 and N 15.1 kg·hm -2 (5.1% of applied N) respectively.The denitrification loss and N 2O emission amounts of the treatment with N fertilizer applied were significantly higher than that of the treatment without N fertilizer applied (P<0.01). These results also indicated that nitrification-denitrification was one of main approaches of nitrogen fertilizer losses in vegetable field. And there were significant relationships between denitrification loss and N 2O emission and soil water content (P<0.01).

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