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, OlalekanOluwole
• 金额: $ 3.64万
• 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: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=619043
• 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氮肥的氨挥发损失，并缩小秋季和春季施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。该公司评估了 ARM-U 在温室和田间的功效。田间和温室的结果表明，ARM-U 在减少尿素肥料中氨挥发方面与商业脲酶抑制剂一样有效。本研究将通过研究 ARM-U 和其他现有商业脲酶抑制剂缩小秋季和春季施氮肥效率差距的潜力，进一步评估 ARM-U 的一些独特特性，特别是其低温流动性和优异的颗粒覆盖率。此前的研究表明，秋季施氮肥的效率仅为春季的80%。然而，农民更喜欢在秋季施肥，因为肥料更便宜，而且秋季施肥可以更好地管理春季的时间。由于我们已经证明脲酶抑制剂，特别是 ARM-U，可以有效减少温室和田间的氨挥发，因此这些抑制剂也可能是缩小秋季和春季施用氮肥之间效率差距的有效技术。该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现场和实验室进行，作为博士论文研究的一部分。该研究将确认低温流动性和增加颗粒覆盖率是否可以提高秋季施用脲酶抑制剂的功效。它还将确定小麦和油菜籽对秋季和春季施用的脲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，这对于可以在秋季施肥而不会遭受任何产量损失的农民来说将是双赢的局面。这将为加拿大农民带来经济和环境效益。