Efficiency of fall-banded nitrogen fertilizer in Manitoba: influence of application date, landscape position and fertilizer additives
Date
2003-02-18
Authors
Tiessen, K.H.D.
Flaten, D.N.
Grant, C.A.
Karamanos, R.E.
Burton, D.L.
Entz, M.H.
Journal Title
Journal ISSN
Volume Title
Publisher
ORCID
Type
Presentation
Degree Level
Abstract
A two-year study was conducted to investigate the effects of application date, landscape position
and a double inhibitor (urease and nitrification) on the efficiency of fall-banded nitrogen (N)
fertilizer under Manitoba conditions. At harvest, the effects of landscape position were apparent
at three of the four intensive sites, with significantly greater grain yields and total recovery of N
in the high landscape positions than in the low landscape positions. Among fertilization
treatments, there were no significant differences in crop response within the high landscape
positions. In the low landscape positions, grain yields, total N uptake, grain yield increases and
fertilizer N use efficiency were highest for the spring and late fall applications, when compared to
early fall, mid fall and early fall with inhibitors. Preliminary soil analyses indicate that percent
recovery of total inorganic N in the fall and spring was greater for late fall applications than for
early fall, and for high as opposed to low landscape positions. However, there was little evidence
of substantial disappearance of mineral N over the winter for all application dates, landscape
positions, and with or without inhibitors.
Description
Keywords
fall-banded N, spring-banded N, NBPT, DCD, wheat (Triticum aestivum), urea fertilizer
Citation
Degree
Department
Program
Advisor
Committee
Part Of
Soils and Crops Workshop