延迟应用和注射尿酶和化抑制剂的化肥减少了氧化排放,提高了玉米产量
A L Woodley1, C F Drury1, X Y Yang1
1Agriculture & Agri-Food Canada, Harrow Research & Development Centre, Harrow, Ontario, Canada.
Journal of environmental quality
|June 6, 2025
概括
优化肥的时间和玉米 (Zea mays L.) 的抑制剂是关键. 用尿素酶和化抑制剂添加尿素酸 (UAN) 增加了玉米的产量,并显著减少了氧化 (N2O) 的排放.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 环境科学 环境科学
背景情况:
- 化肥产生的季初氧化 (N2O) 排放量可能很大,特别是在潮湿的春季条件下.
- 由于温度升高,延迟施加肥料可能会增加氨 (NH3) 挥发.
研究的目的:
- 为了比较氨 (NH3) 损失,N2O 排放和玉米 (Zea mays L.) 谷物产量,在种植前和侧面注射尿素酸 (UAN) 之间进行注射.
- 评估尿酶抑制剂和联合尿酶和化抑制剂在减轻N2O排放和NH3损失方面的疗效.
主要方法:
- 一个为期3年的实地研究粘土土壤.
- 植入前与侧衣UAN注射的比较.
- 包括没有抑制剂的治疗,仅用尿素酶抑制剂和尿素酶加化抑制剂.
主要成果:
- 与种植前应用相比,N应用增加了13%的玉米谷物产量.
- 采用尿酶抑制剂的植入前UAN导致比采用双重抑制剂的植入前UAN高59%的N2O排放.
- 在潮湿的春季年份,侧面应用显著降低了N2O排放量,但在干燥的年份影响最小.
- 与单独的尿素酶抑制剂相比,双尿素酶和化抑制剂的产量缩放N2O排放量减少了37%.
结论:
- 结合尿酶和化抑制剂与侧面涂装UAN应用,可提高玉米产量并减少N2O排放.
- 在高降雨条件下,N2O排放的降低更有效.
- 酶抑制剂单独可以增加N2O排放,强调化抑制的重要性.
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