The mineral N fertilizer urea has a high potential for ammonia (NH3) losses. Addition of a urease inhibitor (UI) can reduce these emissions. In the field and the greenhouse, NH3 emissions were measured directly using a dynamic chamber system and indirectly by determination of fertilizer N use efficiency in winter wheat, grassland and on bare soil. The extent of NH3 losses following surface application of urea as well as the potential of UIs, NBPT, IPAT and 2-NPT for mitigation of NH3 losses was evaluated. In all experiments, NH3 emissions were lower than reported in literature. UIs NBPT, IPAT and 2-NPT reduced losses on average by 33%, 23% and 63%, respectively.
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The mineral N fertilizer urea has a high potential for ammonia (NH3) losses. Addition of a urease inhibitor (UI) can reduce these emissions. In the field and the greenhouse, NH3 emissions were measured directly using a dynamic chamber system and indirectly by determination of fertilizer N use efficiency in winter wheat, grassland and on bare soil. The extent of NH3 losses following surface application of urea as well as the potential of UIs, NBPT, IPAT and 2-NPT for mitigation of NH3 losses was...
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