CAJ | 학술논문

为搞清湿地土壤驱动N2O排放的关键氮源类型，有效减少湿地N2O的排放，本文通过室内控制温湿度，用气相色谱法分析不同外源氮素对湿地N2O排放的影响。结果表明：外加氮源组总是高于对照组N2O排放量（4.4 mg·m-3）。在设定的剂量范围内，单独添加尿素或尿素与硝酸铵1：1配合时N2O排放量呈现先增后减的单峰分布趋势，峰值分别为10.6 mg·m-3和229.0 mg·m-3；单独添加硝酸铵时N2O排放量（32.6~111.0 mg·m-3）随着氮素添加量增加呈现持续上升趋势。单独添加尿素或硝酸铵、尿素与硝酸铵1：1配合均促进N2O的排放，但硝酸铵尿素混合添加对N2O排放量的贡献>单独添加硝酸铵>单独添加尿素。这为预测内蒙古高原区农牧交错带湿地氮素输入可能带来的温室效应和有效减排提供科学依据。
위고청습지토양구동N2O배방적관건담원류형，유효감소습지N2O적배방，본문통과실내공제온습도，용기상색보법분석불동외원담소대습지N2O배방적영향。결과표명：외가담원조총시고우대조조N2O배방량（4.4 mg·m-3）。재설정적제량범위내，단독첨가뇨소혹뇨소여초산안1：1배합시N2O배방량정현선증후감적단봉분포추세，봉치분별위10.6 mg·m-3화229.0 mg·m-3；단독첨가초산안시N2O배방량（32.6~111.0 mg·m-3）수착담소첨가량증가정현지속상승추세。단독첨가뇨소혹초산안、뇨소여초산안1：1배합균촉진N2O적배방，단초산안뇨소혼합첨가대N2O배방량적공헌>단독첨가초산안>단독첨가뇨소。저위예측내몽고고원구농목교착대습지담소수입가능대래적온실효응화유효감배제공과학의거。
It is important to make sure key nitrogen driving N2O emission source from wetland soil for efficient N2O emission reduction. In lab-oratory, the temperature and humidity were kept constant to study effect from different forms of exogenous N on N2O emissions from wetland soil by gas chromatography. The results showed that all groups of exogenous N inputs increased N2O emissions from wetland soil in contrast to CK group(4.4 mg·m-3). Under the group urea(U)alone and the combination of urea with ammonium nitrate(UAN)in a 1:1 concentration ra-tio, the change of N2O emissions showed a unimodal trend, first increased and then decreased, the peak value 10.6 mg·m-3 and 229.0 mg·m-3 of N2O emissions corresponded to U and of UAN, respectively. While N2O emissions showed an upward trend for ammonium nitrate(AN) alone, within the range from 32.6 mg·m-3 to 111.0 mg·m-3 N2O emissions. All exogenous N treatments increased N2O emissions more than CK, UAN combination>AN alone>U alone. This provided a scientific basis for predicting greenhouse effect caused by N fertilizer in wetland soil from farming-pastoral transition zone, as well as a reference for effective reducing N2O emissions from wetlands in Inner Mongolia Plateau.