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Permanent link (DOI): https://doi.org/10.7939/R3319SG86

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Advanced agronomic practices to maximize feed barley (Hordeum vulgare L.) yield, quality, and standability in Alberta environments Open Access

Descriptions

Other title
Subject/Keyword
seeding rate
chlormequat chloride
agronomy
grain quality
cultivar
fungicide
feed barley
lodging
genetics
plant growth regulator
yield
post-emergence nitrogen
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Perrott, Laurel A
Supervisor and department
Linda Hall (Department of Agricultural, Food, and Nutritional Science)
Sheri Strydhorst (Alberta Agriculture and Forestry; Adjunct Professor in Department of Agricultural, Food, and Nutritional Science)
Examining committee member and department
Yvonne Lawley (University of Manitoba)
Stephen Strelkov (Department of Agricultural, Food, and Nutritional Science)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization
Plant Science
Date accepted
2017-07-13T16:04:04Z
Graduation date
2017-11:Fall 2017
Degree
Master of Science
Degree level
Master's
Abstract
The grain yields of feed barley (Hordeum vulgare L.) have increased at a slower rate than the yields of other major crops in Alberta, and seeded barley acres have declined over the past 20 years. Agronomic management and cultivar specific responses to management may provide solutions to increase grain yields and address production constraints such as lodging and quality limitations. Field experiments were conducted in 2014, 2015, and 2016 at four rainfed and one irrigated site in Alberta to evaluate the effects of seeding rate, post-emergence N, the plant growth regulator chlormequat chloride (CCC), and foliar fungicides on feed barley production. A separate field experiment was conducted to evaluate the effect of an advanced agronomic management package comprised of post-emergence N, CCC, and dual foliar fungicide on 10 feed barley cultivars. The largest yield increases (up to 19%) occurred when post-emergence N was applied in irrigated or high precipitation conditions and when levels of N applied at seeding were relatively low. Foliar fungicides resulted in small (3%) yield increases in the low disease pressures encountered in the study. Some agronomic and yield responses to dual fungicide and CCC depended on seeding rate. Chlormequat chloride did not markedly reduce height and lodging. Genetic lodging resistance was the best tool for lodging reduction in the study. Advanced agronomic management increased grain yield by 9.3% across all cultivars that all responded similarly. The highest yielding and quality cultivars were two-row. Of concern, recently registered cultivars (2008-2013) demonstrated static or negative yield gains compared with cultivars registered up to 13 years prior (2000). The 9.3% yield increase from advanced management was three times larger than the genetic yield gains observed across 10 cultivars registered between 2000 and 2013.
Language
English
DOI
doi:10.7939/R3319SG86
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
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Last modified: 2017:11:08 17:05:35-07:00
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