对通过生物抑制剂或双重涂层增效的尿素肥料进行实地评估

Agronomy Pub Date : 2024-09-17 DOI:10.3390/agronomy14092118
Ben E. Brace, Maxim J. Schlossberg
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引用次数: 0

摘要

相对于可溶性氮源,高效肥料(EEFs)可支持草坪草的稳定生长和浓密的冠层质量,同时减少草坪草系统中以硝酸盐、氨和/或一氧化二氮形式流失的氮。现代 EEF 为草坪管理者的养分管理工作提供了更大的操作效果和多功能性,并要求对其时间反应进行实地鉴定。同样,对商用 EEF 养分回收的实地确认有助于利益相关者为其特定应用选择合适的 EEF。我们的研究目标是量化肯塔基蓝草生长/产量、冠层密度和颜色以及肥料氮回收对实际施用常规尿素或增效颗粒肥的时间响应。2014 年 5 月和 2018 年 6 月,肯塔基蓝草地块施用了常规尿素、N-(正丁基)硫代磷酸三酰胺(NBPT)和双氰胺(DCD)稳定尿素或聚合物/硫包膜尿素(PSCU)颗粒肥,氮肥用量为 43.9 千克公顷/1(0.9 磅/1000 平方英尺)。在两个生长季中,因变量的反应受增效的影响很大。经过 16.5 周的反复评估,从常规尿素、稳定尿素和 PSCU 中回收的肥料氮的平均百分比分别为 57.5%、68.4% 和 89.1%。在处理后 23 至 51 天(DFT)内,PSCU-N 的回收率明显高于常规尿素或稳定尿素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Field Evaluation of Urea Fertilizers Enhanced by Biological Inhibitors or Dual Coating
Relative to soluble N sources, enhanced-efficiency fertilizers (EEFs) support steady turfgrass growth and dense canopy quality while abating N loss as nitrate, ammonia, and/or N2O from turfgrass systems. Modern EEFs provide turfgrass managers greater operational effect and versatility in their nutrient management efforts and compel field characterization of their temporal response. Likewise, field confirmation of commercial EEF nutrient recovery helps stakeholders select the appropriate EEF for their specific application. Our research objective was to quantify the temporal response of Kentucky bluegrass growth/yield, canopy density and color, and fertilizer N recovery to a practical application of conventional urea or an enhanced-efficiency granular fertilizer. In May 2014 and June 2018, Kentucky bluegrass plots were fertilized by granules of conventional urea, N-(n-butyl) thiophosphoric triamide (NBPT)-, and dicyandiamide (DCD)-stabilized urea, or polymer-/sulfur-coated urea (PSCU) at a N rate of 43.9 kg ha−1 (0.9 lbs/1000 sq. ft.). The dependent variable response over the two growing seasons was highly affected by efficiency enhancement. Following the repeated 16.5-week evaluations, the mean percent of fertilizer N recovered from conventional urea, stabilized urea, and PSCU totaled 57.5, 68.4, and 89.1%, respectively. In the 23 to 51 days from treatment (DFT), recovery of PSCU-N significantly exceeded that from conventional or stabilized urea.
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