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    • Journal of Range Management, Volume 47 (1994)
    • Journal of Range Management, Volume 47, Number 6 (November 1994)
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    Comparative growth and interference between cheatgrass and yellow starthistle seedlings

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    Author
    Sheley, R. L.
    Larson, L. L.
    Issue Date
    1994-11-01
    Keywords
    plant weight
    root length
    intraspecific competition
    interspecific competition
    Centaurea solstitialis
    seedlings
    Bromus tectorum
    length
    weight
    introduced species
    plant competition
    rangelands
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    Citation
    Sheley, R. L., & Larson, L. L. (1994). Comparative growth and interference between cheatgrass and yellow starthistle seedlings. Journal of Range Management, 47(6), 470-474.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644372
    DOI
    10.2307/4002999
    Additional Links
    https://rangelands.org/
    Abstract
    Annual grasslands in the Pacific Northwest are being invaded by Eurasian weeds, such as yellow starthistle (Centaurea solstitialis L.). Plant-plant interactions influence community dynamics and plant establishment. The objectives of this study were to quantify the effects of interference between seedlings of cheatgrass (Bromus tectorum L.) and yellow starthistle and to compare growth of isolated individuals of these species. Isolated individuals and addition series mixtures with total stand densities ranging from 20-20,000 plants m-2 were grown in an environmental chamber (10 degrees C, 12-hour daylength). Individuals were harvested on 4-day intervals between 10 and 46 days, and mixtures were harvested 37 days after planting. Shoot weight, root weight, leaf area, and total root length of isolated individuals were similar. Yellow starthistle roots penetrated deeper into the soil than did cheatgrass roots 22 days after planting. Intraspecific interference was greater than interspecific interference for both species, and resource partitioning via rooting depth was evident. The yellow starthistle root:shoot ratio and the cheatgrass lower (below 200 mm): upper (above 200 mm) root ratio increased with increasing densities. Yellow starthistle and cheatgrass minimize interspecific interference as seedlings through differential growth and rooting depth. Invasion of cheatgrass rangelands by yellow starthistle increase resource partitioning and reduce our ability to revegetate rangelands by conventional means.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002999
    Scopus Count
    Collections
    Journal of Range Management, Volume 47, Number 6 (November 1994)

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