Campus Units
Agronomy
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
2020
Journal or Book Title
Agronomy Journal
DOI
10.1002/agj2.20495
Abstract
Spring‐seeded annual forages are well adapted to the Great Plains; however, the influence of application rate and method of nitrogen (N) fertilization on winter wheat (WW) (Triticum aestivum L.) forage productivity is unknown. A field study was conducted in a factorial design for three years to determine the influence of N application rate and method on water and N productivity of awnletted WW ‘Willow Creek’. Urea was either broadcast or banded at planting using N fertilization rates of 0, 28, 56, and 84 kg N ha−1. The N application rate × method interaction was significant only for WW height. Weed herbage was low at WW forage harvest, 19 kg ha−1. As N fertilization rate increased from 0 to 84 kg N ha−1, wheat stem density and height increased by 70 and 78%, respectively, and herbage increased by 58%. Increased N rate increased WW water use quadratically, but water productivity (kg biomass ha−1 mm−1) was 68% greater at 84 kg N ha−1. However, N application method did not influence water use or productivity. Banded N application increased N accumulation in WW herbage by 11% compared to broadcast N. Increasing N rate reduced N productivity by 24% compared to 0 kg N ha−1. Willow Creek WW produced greater herbage yield as N fertilization rate increased with banded application. Willow Creek is a highly productive fall‐planted forage in this predominantly spring‐planted small grain‐grain legume region.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Lenssen, Andrew W.; Sainju, Upendra M.; Jones, Clain; McVay, Kent; and Angvick, Terry, "Nitrogen fertilization rate and method influences water and nitrogen productivity of forage winter wheat" (2020). Agronomy Publications. 684.
https://lib.dr.iastate.edu/agron_pubs/684
Comments
This is a manuscript of an article published as Lenssen, Andrew W., Upendra M. Sainju, Clain Jones, Kent McVay, and Terry Angvick. "Nitrogen fertilization rate and method influences water and nitrogen productivity of forage winter wheat." Agronomy Journal (2020). doi: 10.1002/agj2.20495.