Effects of novel nitrification and urease inhibitors (DCD/TZ and 2-NPT) on N2O emissions from surface applied urea: An incubation study
文献类型: 外文期刊
第一作者: Ni, Kang
作者: Ni, Kang;Ni, Kang;Kage, Henning;Pacholski, Andreas;Pacholski, Andreas
作者机构:
关键词: Nitrous oxide;Nitrification inhibitor;Urease inhibitor;Ammonia;Incubation trial
期刊名称:ATMOSPHERIC ENVIRONMENT ( 影响因子:4.798; 五年影响因子:5.295 )
ISSN: 1352-2310
年卷期: 2018 年 175 卷
页码:
收录情况: SCI
摘要: A 41-day incubation trial was conducted to test the single and combined effects of the novel urease (N-(2-Nitrophenyl) phosphoric triamide, 2-NPT) and nitrification inhibitors (mixture of dicyandiamide and 1H-1,2,4triazole, DCD/TZ) on N2O emissions and underlying soil processes from a North German sandy loam soil. The effects of treatment on N2O emission were determined using static closed chamber incubation and detected using a photo-acoustic gas monitor. The emission processes were strongly related to soil mineral N and pH dynamics, obtained from destructive sampling of replicate incubation chambers. The combined use of urease and nitrification inhibitors slightly increased the reduction of N2O compared with single use of the nitrification inhibitor (69% vs. 61%). The small amount of soil used in the incubation and the depletion of labile carbon by air drying and pre-incubation caused very low initial N2O emissions, and glucose addition significantly stimulated N2O emission by supplying labile carbon. The urease inhibitor significantly reduced simultaneously determined qualitative NH3 emissions in either urea alone (90%) or urea plus nitrification inhibitor treatment (82%). These results highlighted the potential of the combined use of urease and nitrification inhibitors with urea application to mitigate soil NH3 and N2O emissions.
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