Stability of stored N-(n-butyl) thiophosphoric triamide (NBPT) treated urea-based fertilizers

被引：2
作者：
Lasisi, Ahmed A. [1 ]
Kumaragamage, Darshani [2 ]
Akinremi, Olalekan [1 ]
机构：
[1] Univ Manitoba, Dept Soil Sci, Winnipeg, MB, Canada
[2] Univ Winnipeg, Dept Environm Studies & Sci, Winnipeg, MB, Canada
来源：
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS | 2020年 / 51卷 / 07期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Ammonia volatilization; N-(n-butyl) thiophosphoric triamide; storage time; urea; SURFACE-APPLIED UREA; AMMONIA VOLATILIZATION; INHIBITOR; EMISSIONS; NITRATE; MITIGATION; EFFICIENCY; LOSSES; WHEAT;
D O I：
10.1080/00103624.2020.1744632
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The effectiveness of N-(n-butyl) thiophosphoric triamide (NBPT) in reducing ammonia volatilization from urea-based fertilizers has been thoroughly investigated. However, the stability of this inhibitor during storage of NBPT treated urea and urea ammonium nitrate (UAN) needs further investigation. We compared ammonia volatilization from NBPT treated urea (360 mg NBPT kg(-1) urea) and UAN (180 mg NBPT L-1 UAN) that were stored at room temperature for 6, 3 and 0 months. We measured ammonia volatilization with cylindrical chambers fitted with acid-charged discs at five times for 21 d. Total ammonia volatilization (measured as a % of applied nitrogen) was significantly greater in untreated urea and UAN (32% to 33%) than those in NBPT treated urea and UAN (6% to 12%). Reduction of ammonia volatilization was not significantly different among NBPT treated urea (73% to 81%) and UAN (63% to 73%) irrespective of storage time. This implies that farmers can mix their urea-based fertilizers with NBPT formulation 6 months prior to fertilization without compromising the ammonia volatilization reducing property of the NBPT.
引用
收藏
页码：911 / 918
页数：8
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