The effect of biochar (BC) addition on NOx gas emissions was investigated from a calcareous soil. Application rates of zero (BC0), 1 (BC1), 2 (BC2), 5 (BC5), and 10 (BC10) percent weight/weight were used. The NOx emission flux was measured in a dynamic flux chamber. The flux was generally higher in BC0 than in the amended plots. The total NOx emission from BC1, BC2, BC5, and BC10 fell by 50.3, 75.3, 80.4, and 79.6%, respectively, relative to BC0. The emission flux from the BC5 showed a minimum average of 21.1 ± 13.5 μg N/(m²•h) for NO, −0.81 ± 1.31 μg N/(m²•h) for NO₂, and 20.6 ± 13.8 μg N/(m²•h) for NOx. By comparison, the measured maximum average emission flux from the BC0 was 107.2 ± 30.98 μg N/(m²•h) for NO, −2.31 ± 2.56 μg N/(m²•h) for NO₂, and 105.3 ± 45.3 μg N/(m²•h) for NOx. The results indicate that biochar amendment can potentially reduce NOx emissions.

从钙质土壤中研究了生物炭（BC）添加对NOx气体排放的影响。施用率为零（BC0），1（BC1），2（BC2），5（BC5）和10（BC10）重量/重量百分比。在动态通量室中测量NOx排放通量。BC0中的通量通常比修正图中的通量高。相对于BC0，BC1，BC2，BC5和BC10的总NOx排放量分别下降了50.3、75.3、80.4和79.6％。从BC5发射通量显示出21.1±13.5微克N /（米的最小平均² •2H）为NO，-0.81±1.31微克N /（米² •2H）为NO ₂，和20.6±13.8微克N / NO x为（m ² •h）。相比之下，测得的BC0的最大平均平均发射通量为107.2±30.98μgN /（m² •2H）为NO，-2.31±2.56微克N /（米² •2H）为NO ₂，和105.3±45.3微克N /（米² •1H）对NO X。结果表明，生物炭改良剂可以潜在地减少NOx排放。