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The Performance of Spring Wheat (Triticum aestivum L.) Cultivar Mixtures in Conventionally and Organically Managed Systems in Western Canada

  • Author / Creator
    Nguyen, Khang
  • Wheat cultivar mixtures may positively alter grain yield, quality, improve biotic and abiotic management, and may be employed in both conventional and organic management systems. Such promising benefits have not been thoroughly studied in Canada, especially in the western region where most Canadian wheat is produced. We conducted a twelve site-year study on both conventionally and organically managed locations across western Canada, comparing the performance regarding grain yield, quality, lodging resistance, and weeds suppression of five sole Canadian Western Red Spring wheat cultivars with twenty two-way and three-way mixtures. Mixing Glenn, CDC Titanium, and Lillian produced stable and high yield over a wide range of environments. A three-way mixture of Go Early (tall), Carberry (semi-dwarf), and Lillian (medium height) diminished lodging, leading to improved yield under conventional environments in North Central Alberta and Central Saskatchewan. The two-way mixture of Glenn and Lillian boosted yield in conventional environments in Northwest Alberta and Central Saskatchewan and an organic environment in North Central Alberta. Mixtures managed organically did combine high productivity and elevated grain protein. Mixing lodging-resistant with susceptible cultivars reduced the overall damage in conventional environments. Meanwhile, high-tillering and early heading cultivars are recommended for mixing to retain grain production under weedy environments. In conclusion, wheat cultivar mixtures provided western conventional farmers yield benefits in the presence of abiotic pressures, and organic farmers simultaneous yield and quality benefit.

  • Subjects / Keywords
  • Graduation date
    Fall 2018
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3DJ58Z58
  • License
    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.