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。
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).
出处
《园艺学报》
CAS
CSCD
北大核心
2004年第6期762-766,共5页
Acta Horticulturae Sinica
基金
福建省自然科学基金重点项目(F0100001)
中科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开放课题(LAPC KF 2003 02)资助项目
关键词
菜田
氮肥
反硝化
氧化亚氮
Vegetable field
Nitrogen fertilizer
Denitrification
Nitrous oxide
