Efficacy of a novel urease inhibitor in reducing ammonia volatilization losses and increasing N uptake and grain yield from fall versus spring applied urea-based N fertilizer

与春季施用尿素氮肥相比，新型脲酶抑制剂在减少秋季氨挥发损失、增加氮吸收和谷物产量方面的功效

• 批准号: 501196-2016
• 负责人: Akinremi, Olalekan
• 金额: $ 3.9万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=643630
• 关键词: Efficacy; novel; urease; inhibitor; reducing

The overall objective of this study is to reduce ammonia volatilization losses from urea-based nitrogen (N) fertilizers and bridge the efficiency gap between fall and spring applied N fertilizer. Active AgriProducts (AAP) is in the process of developing a novel urease inhibitor (ARM-U) that takes into consideration some of the weaknesses of existing products. The company has evaluated the efficacy of ARM-U in the greenhouse and in the field. The results from the field and the greenhouse showed that ARM-U was as effective as commercial urease inhibitor in reducing ammonia volatilization from urea-based fertilizers. This study will further evaluate some of the unique characteristics of ARM-U, especially its low temperature fluidity and superior particle coverage by examining the potential of ARM-U and other existing commercial urease inhibitors to bridge the efficiency gap between fall and spring applied N fertilizer. Previous studies have shown that N fertilizer applied in the fall is only 80% as efficient as that applied in the spring. Nevertheless, farmers prefer to apply fertilizers in the fall because fertilizers are cheaper and fall application makes for better time management in the spring. Since we have shown that urease inhibitors in general, and ARM-U in particular, were effective in reducing ammonia volatilization in the greenhouse and in the field, these inhibitors may also be an effective technology for reducing the efficiency gap between fall and spring applied N fertilizers. The study will be carried out by a graduate student with help from a technician and a summer student in the field and in the laboratory as part of a doctoral thesis research. The study will confirm if low temperature fluidity and increased particle coverage improves the efficacy of fall applied urease inhibitors. It will also determine yield and N uptake responses of wheat and canola to urease inhibitors applied in the fall and spring. Our ability to provide information on the effect of low fall temperature on the efficacy of urease inhibitors and their ability to bridge the efficiency gap will be a win-win situation for farmers who can apply their fertilizers in the fall, without suffering any yield penalty. This will provide both economic and environmental benefits to Canadian farmers.********************

本研究的总体目标是减少尿素基氮肥的氨挥发损失，并弥合秋季和春季施用氮肥之间的效率差距。Active AgriProducts（AAP）正在开发一种新型脲酶抑制剂（ARM-U），该抑制剂考虑到了现有产品的一些弱点。该公司已经评估了ARM-U在温室和田间的功效。田间和温室试验结果表明，ARM-U在减少尿基肥料氨挥发方面与商业脲酶抑制剂一样有效。本研究将进一步评估ARM-U的一些独特特性，特别是其低温流动性和上级颗粒覆盖度，通过检查ARM-U和其他现有的商业脲酶抑制剂的潜力，以弥补秋季和春季施氮之间的效率差距。以前的研究表明，秋季施用氮肥的效率只有春季施用氮肥的80%。然而，农民更喜欢在秋季施肥，因为肥料更便宜，秋季施肥有助于春季更好地管理时间。由于我们已经表明，脲酶抑制剂，特别是ARM-U，在温室和田间有效地减少氨挥发，这些抑制剂也可能是一种有效的技术，减少秋季和春季施用氮肥之间的效率差距。这项研究将由一名研究生在一名技术人员和一名暑期学生的帮助下在实地和实验室进行，作为博士论文研究的一部分。该研究将证实低温流动性和增加的颗粒覆盖率是否会提高秋季应用的脲酶抑制剂的功效。它还将确定小麦和油菜对秋季和春季施用的尿素酶抑制剂的产量和氮吸收反应。我们能够提供有关秋季低温对脲酶抑制剂功效的影响及其弥合效率差距的能力的信息，这对农民来说将是一个双赢的局面，他们可以在秋季施肥，而不会遭受任何产量损失。这将为加拿大农民提供经济和环境效益。*