A field experiment was conducted study the effect of biochar and a nitrification inhibitor (nitrapyrin) on NH₃ and N₂O emissions from a silt clay loam soil near Peshawar, Pakistan. The experimental design was a randomized complete block with eight treatments in three replicates: (no urea), urea (150 kg N ha⁻¹), B (6 t ha⁻¹), B (12 t ha⁻¹), urea + B6, urea + B12, urea + B6 + NI (700 g ha⁻¹), and urea + B12 + NI. Application of urea with two levels of biochar reduced total NH₃ by 18–29% and N₂O emissions by 25–22%, respectively, relative to the treatment with urea alone. Nitrous oxide emission was significantly lower (51%) in the nitrapyrin treatment than in the urea-alone treatment (P < 0.05), but there was no effect on NH₃ emission. The wheat plant biomass, grain yield, and total N uptake increased significantly by 10–21%, 05–15%, and by 11–25%, respectively, in the treatments with urea and biochar, relative to the treatment with urea alone. Additionally, nitrapyrin further enhanced biomass, grain yield, and total N uptake by 33%, 19%, and 46%, respectively, relative to the treatment with urea alone. The results indicate that application of urea with biochar or in combination with nitrapyrin has the potential to mitigate NH₃ and N₂O emissions, which are important to increase nitrogen use efficiency and wheat productivity.

进行了野外试验，研究了生物炭和硝化抑制剂（尼古丁）对巴基斯坦白沙瓦附近粉质粘土壤土中NH ₃和N ₂ O排放的影响。实验设计是一个随机的完整实验区，一式三份，共进行了八次处理：（无尿素），尿素（150 kg N ha ^-1），B（6 t ha ^-1），B（12 t ha ^-1），尿素+ B6，尿素+ B12，尿素+ B6 + NI（700g ha ^-1）和尿素+ B12 + NI。两种生物炭水平的尿素施用可使总NH ₃和N ₂减少18–29％相对于仅使用尿素处理，O排放量分别降低了25-22％。与单独使用尿素的处理相比，硝普胺处理的一氧化二氮排放量显着降低（51％）（P  <0.05），但对NH ₃排放没有影响。与单独使用尿素处理相比，使用尿素和生物炭处理的小麦植物生物量，谷物产量和总氮吸收量分别显着增加了10–21％，05–15％和11–25％。另外，相对于单独用尿素处理，硝普林进一步将生物量，谷物产量和总氮吸收分别提高了33％，19％和46％。结果表明，尿素与生物碳或与硝普林联合使用具有缓解NH ₃和N ₂的潜力。O的排放，这对于提高氮的利用效率和小麦的生产力很重要。