Year: 2019
Type: article
Abstract: Nitrogen (N) management for sugarbeet is challenging due to the variable effects of weather on soil N transformations and N losses, and may be particularly difficult on soils subject to N leaching.A field study was conducted to determine if extending the in-season N application termination date beyond the conventional cutoff date of 10 weeks after planting would improve sucrose yield.Three in-season N application timing treatments were evaluated, each consisting of three fertigation events totaling 84 kg N ha -1 in addition to a preplant application of 67 kg N ha -1 .Treatments were 28 kg N ha -1 applied: (1) every 7-8 days from June 15 to June 30 (10 weeks after planting); (2) every 14-16 days from June 15 to July 15; and (3) every 28 to 32 days from June 15 to August 15.Treatments did not affect yield components, except in 2009 when terminating N application on August 15 reduced root sucrose concentration by 6.0 g kg -1 .Compared to the conventional June 30 cutoff, gross economic return was negligible for the July 15 cutoff and was consistently negative (-$146 ha -1 ) for the August 15 cutoff showing no advantage to extending the N application period beyond June 30.
Source: Journal of Sugarbeet Research
DOI: 10.5274/jsbr.56.1.21
Authors: Bart Stevens, William Iverson, Jay Jabro
Institution: Northern Plains Agricultural Research Laboratory
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W3115863388