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    • Journal of Range Management, Volume 49 (1996)
    • Journal of Range Management, Volume 49, Number 3 (May 1996)
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    Emergence date effects on resource partitioning between diffuse knapweed seedlings

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    Author
    Sheley, R. L.
    Larson, L. L.
    Issue Date
    1996-05-01
    Keywords
    resources
    Centaurea diffusa
    soil water potential
    seedling emergence
    ambient temperature
    rain
    weight
    seasonal variation
    plant competition
    dry matter
    
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    Citation
    Sheley, R. L., & Larson, L. L. (1996). Emergence date effects on resource partitioning between diffuse knapweed seedlings. Journal of Range Management, 49(3), 241-244.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644247
    DOI
    10.2307/4002885
    Additional Links
    https://rangelands.org/
    Abstract
    Diffuse knapweed (Centaurea diffusa Lam.) has reduced forage production, watershed quality, and biodiversity, and increased soil erosion on millions of hectares of rangeland. Diffuse knapweed has evolved mechanisms that allow it to dominate sites in nearly monotypic stands. Understanding these mechanisms may provide useful information in developing weed management strategies. Objectives of this study were to investigate interference, growth rates, and resource partitioning between early and late emerging diffuse knapweed seedlings. Seeds of diffuse knapweed were planted 21 March (early emerging) and 14 April (late emerging) 1993 in addition series mixtures with total stand densities ranging from 1,000 7,000 plants m-2. Shoots were harvested on 1 and 2 June 1993. The greatest interference was among coemerging seedlings. Resource partitioning ratios (51 and 1398) indicated substantial partitioning between seedlings having different emergence dates. Continuous seedling emergence may allow diffuse knapweed to occupy all available safe sites.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002885
    Scopus Count
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    Journal of Range Management, Volume 49, Number 3 (May 1996)

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