How to translate text using browser tools
29 March 2023 Winter wheat responses to enhanced efficiency liquid nitrogen fertilizers in the Canadian Prairies
J.L. Owens, Z. Wang, B.W. Thomas, X. Hao, K. Coles, E. Rahmani, R. Karimi, K. Gill, B.L. Beres
Author Affiliations +
Abstract

To evaluate how enhanced efficiency liquid nitrogen (N) fertilizers affect winter wheat (Triticum aestivum L.) production under irrigated and rain-fed environments, experiments were conducted at two irrigated and five rain-fed sites across the Canadian Prairies from 2013 to 2018 (22 site-years). The N fertilizers included urea ammonium nitrate (UAN) treated with (i) urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT), (ii) NBPT plus nitrification inhibitor dicyandiamide, and (iii) nitrification inhibitor nitrapyrin (Nitrapyrin), as well as untreated UAN and urea, and polymer-coated urea (PCU). All fertilizers were applied by banding 50% at planting and 50% in-crop in early-spring, except PCU, where PCU was applied at planting and urea was applied in early-spring. Nitrous oxide (N2O) emissions and methane (CH4) uptake were measured at one rain-fed site from 2014 to 2017. NBPT increased grain yield by 1.2%–14% and 2.8%–4% under irrigated and rain-fed environments, respectively, relative to all the other N sources except untreated urea in the rain-fed environment. Total N uptake with NBPT was between 0% and 12% higher than the other N sources across irrigated and rain-fed environments. The results suggested that both grain yield and N use efficiency were optimized when UAN contained a urease inhibitor. All liquid enhanced efficiency fertilizers produced grain protein content greater than 11%, except Nitrapyrin under irrigated environments. Data from three site-years indicated that greenhouse gas emissions were unaffected by N source under rain-fed conditions. Liquid UAN with a urease inhibitor may have the most potential to optimize winter wheat production and N use efficiency in the Canadian Prairies.

J.L. Owens, Z. Wang, B.W. Thomas, X. Hao, K. Coles, E. Rahmani, R. Karimi, K. Gill, and B.L. Beres "Winter wheat responses to enhanced efficiency liquid nitrogen fertilizers in the Canadian Prairies," Canadian Journal of Plant Science 103(4), 353-367, (29 March 2023). https://doi.org/10.1139/cjps-2022-0208
Received: 15 September 2022; Accepted: 26 January 2023; Published: 29 March 2023
JOURNAL ARTICLE
15 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

KEYWORDS
agronomic efficiency
enhanced efficiency nitrogen fertilizer
global warming potential
greenhouse gas emissions
soil moisture
split-fertilization
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top