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    Canadian bluejoint response to heavy grazing

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    Author
    Collins, W. B.
    Becker, E. F.
    Collins, A. B.
    Issue Date
    2001-05-01
    Keywords
    Calamagrostis canadensis
    Epilobium angustifolium
    rhizomes
    plant development
    wildlife
    viability
    competitive ability
    carbohydrates
    browse plants
    seed weight
    seed productivity
    shoots
    Alaska
    horses
    weight
    woody plants
    digestibility
    cattle
    nitrogen content
    biomass
    phenology
    plant competition
    grazing
    trampling
    chemical constituents of plants
    Calamagrostis canadensis
    overstocking
    forage quality
    boreal forests
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    Citation
    Collins, W. B., Becker, E. F., & Collins, A. B. (2001). Canadian bluejoint response to heavy grazing. Journal of Range Management, 54(3), 279-283.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643870
    DOI
    10.2307/4003248
    10.2458/azu_jrm_v54i3_collins
    Additional Links
    https://rangelands.org/
    Abstract
    A disclimax stand of Canadian bluejoint (Calamagrostis canadensis (Michx.) Beauv.) was heavily grazed by cattle and horses for 4 years to weaken the grass's competition with hardwoods important as browse and cover to wildlife. Stocking at 0.084 ha AUM(-1) resulted in uniform utilization of bluejoint and maintenance of early phenology through the growing season. Etiolated bluejoint declined about 90%, but grass production increased 10 to 15%, as fireweed (Epilobium angustifolium L.), a principal herbaceous component of the stand, decreased in response to trampling. Rhizomes of heavily grazed bluejoint had lower total nonstructural carbohydrates (TNC) (p = 0.0127), lower weight (g cm(-1) length) (p = 0.05), and reduced biomass (g cm(-3) of soil) (p = 0.05). Shoots of grazed bluejoint maintained higher nitrogen (p = 0.0001) and higher digestibility (IVDMD) (p = 0.0017) than bluejoint that was never grazed. This enabled heavily grazed bluejoint to retain good forage quality through the entire growing season, as opposed to ungrazed bluejoint, which became poor forage at the time of flowering during early July. Following one season of rest, rhizome TNC, shoot nitrogen, and IVDMD returned to levels of never grazed bluejoint. Seedhead production, seed production, seed weights, and seed viability of rested bluejoint were about the same as in ungrazed stands. On wet sites, heavy grazing does not adequately reduce the vigor of this grass.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003248
    Scopus Count
    Collections
    Journal of Range Management, Volume 54, Number 3 (May 2001)

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