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Permanent link (DOI): https://doi.org/10.7939/R3FX4Q

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Forage Responses to Herbicide Weed Control in Grass-Legume Swards Open Access

Descriptions

Other title
Subject/Keyword
Grass
Legume
Canada Thistle
Weed Control
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
McLeod, Erin Marie
Supervisor and department
Dr. Edward Bork
Examining committee member and department
Dr. Jane King (Agriculture, Food and Nutritional Science
Dr. Linda Hall (Agriculture, Food and Nutritional Science)
Dr. Simon Landhausser (Renewable Resources)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization

Date accepted
2011-01-11T17:26:46Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
Two field studies assessed sward dynamics to legume removal with and without Canada thistle and other broadleaf plants (i.e. forbs). When grown in mixtures with grass, alfalfa had a more consistent negative yield response to legume removal compared to clover swards. Within established pastures, total forage (i.e. legume and grass) had little association with Canada thistle, but was instead associated with perennial forbs such as dandelion. Grass responses (biomass and protein yield) in established swards were unable to compensate for legume removal up to 2 years after spraying. Relative yield ratios were used to identify weed and legume thresholds, and indicated the removal of legume and Canada thistle did not always negatively impact forage production. Instead, select positive yield responses were observed depending on the initial composition, growing conditions and abundance of weed and legume.
Language
English
DOI
doi:10.7939/R3FX4Q
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File title: Responses to Herbicide Weed Control in Grass-Legume Swards
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