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Effect of urea and nitrification inhibitors on methane consumption

机译：尿素和硝化抑制剂对甲烷消费的影响

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Effect of fertilizer urea and urea mixed with different doses of two nitrification inhibitors viz. dicyandiamide (DCD) and karanjin [a furanoflavonoid, obtained from karanja (Pon-gamia glabra Vent.) seeds] on methane (CH_4) consumption was examined in an alluvial soil (typic ustochrept) maintained at field capacity. Mean CH_4 consumption rate, as well as total CH_4 consumption was lower on the addition of karanjin due to slower nitrification and higher conservation of NH_4~+ released from applied urea. Addition of urea led to 17% reduction of total methane consumption while urea combined with karanjin and DCD had 50-64% and 19-34% reduction, respectively. Karanjin had higher nitrification inhibition (62-75%) than DCD (9-42%) at the end of incubation period. Application of nitrification inhibitors may appreciably retard CH_4 consumption and can increase its emission.
机译：肥料尿素和尿素与不同剂量的两种硝化抑制剂的影响。在甲烷（CH_4）消费中，在甲烷（CH_4）消耗中，在甲烷（典型的Ustochreptep）中维持在现场容量的甲烷（CH_4）消费中，获得二氰基胺（DCD）和呋喃甜醛[呋喃甜醛植物。由于从施用尿素释放的NH_4〜+的NH_4〜+更高的NH_4〜+较高，因此CH_4消耗率和CH_4消费量较低，并且从施用尿素释放的NH_4〜+较高的守恒度下降。尿素的添加导致总甲烷消耗的17％降低，而尿素与卡兰津和DCD联合的尿素分别为50-64％和19-34％的减少。在孵育期结束时，Karanjin比DCD（9-42％）更高的硝化抑制（62-75％）。硝化抑制剂的应用可能明显延缓CH_4消耗，可以增加其排放。

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