秋季施加的便可以为后续的作物年节约过剩的土壤特征无机N
Rodrick D Lentz1, Jim A Ippolito2
1USDA-ARS Northwest Irrigation and Soils Research Laboratory, Kimberly, Idaho, USA.
Journal of environmental quality
|May 13, 2025
概括
在半干旱的土壤中用尿素肥料应用乳制品便,显著改变了循环. 肥料减少了气损失,并延迟了无机气的运输,影响了土壤气的可用性和作物吸收.
科学领域:
- 土壤科学 土壤科学
- 农业学是一种农业学.
- 环境科学 环境科学
背景情况:
- 了解营养相互作用对于半干旱地区的可持续农业至关重要.
- 乳制品和尿素肥是常见的投入,但它们对土壤动态的联合影响需要研究.
研究的目的:
- 在耕作半干旱土壤中研究乳制品和尿素肥料之间的相互作用.
- 评估这些相互作用对土壤动力学,水可提取的有机碳和灌玉米产量的影响.
主要方法:
- 尿素肥 (FertN) 的秋季应用在三个速率 (N0,N1,N2) 有或没有乳制品便.
- 监测土壤净 (N) 矿化,无机N (InorgN) 和可在水中提取的有机碳 (WEOC) 到1.2米深.
- 测量化玉米产量和N吸收,以开发一个移动的N土壤预算.
主要成果:
- 肥料添加抑制了添加的尿素-N的可用性,可能是通过NH4+吸附或粘土固定.
- 无机N呈现下降脉冲和漏特征,与WEOC在上层土壤层的吸附和积累形成鲜明对比.
- 在受肥土壤中,移动N净损失显著减少,这表明与未受肥土壤相比,损失减少.
结论:
- 一次性降落肥料应用刺激了复杂的N循环,中断和延迟了通过土壤配置文件的无机N运输.
- 肥料的应用有效地减少了气损失,并改善了半干旱土壤中的气保留.
- 这些发现对优化肥料和便管理有影响,以改善土壤健康和作物生产率.
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