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    • Journal of Range Management, Volume 48 (1995)
    • Journal of Range Management, Volume 48, Number 5 (September 1995)
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    Effect of competition by cheatgrass on shoot growth of Idaho fescue

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    Author
    Nasri, M.
    Doescher, P. S.
    Issue Date
    1995-09-01
    Keywords
    strain differences
    selection responses
    ecotypes
    Festuca idahoensis
    shoots
    Bromus tectorum
    pastures
    weight
    Oregon
    tillers
    biomass production
    plant competition
    rangelands
    plant height
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    Citation
    Nasri, M., & Doescher, P. S. (1995). Effect of competition by cheatgrass on shoot growth of Idaho fescue. Journal of Range Management, 48(5), 402-405.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644234
    DOI
    10.2307/4002242
    Additional Links
    https://rangelands.org/
    Abstract
    Ability to compete with alien weeds may be one factor enabling high-seral, native bunchgrasses to persist on degraded rangelands. This study examined the effect of competition from cheatgrass (Bromus tectorum L.) on shoot growth of Idaho fescue (Festuca idahoensis. Elmer). Four Idaho fescue collections were obtained from degraded rangelands, while the fifth was from a site in high ecological condition. Plants were established in pots in a greenhouse with 2 watering regimes, and ratios of Idaho fescue:cheatgrass of 1:0, 1:5, and 1:10. Plants were grown for 56 days. Increasing competition from cheatgrass depleted soil moisture and reduced growth of Idaho fescue. However, Idaho fescue produced greater tiller and leaf numbers than cheatgrass. Idaho fescue plants from the pristine population produced 0.57 g aboveground biomass while plants from the degraded sites produced 0.31 g. Aboveground biomass from the pristine population was reduced 35% and 56% at the 1:5 and 1:10 competition levels respectively, compared to the control (1:0 ratio). Aboveground biomass of plants from the degraded populations was similar to the control at the 1:5 level, and was reduced 32% at the 1:10 level. These results indicated that Idaho fescue from the degraded sites exhibits a different response to competition from cheatgrass than Idaho fescue from the pristine site. This information may prove useful in selecting ecotypes of Idaho fescue for range revegetation.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002242
    Scopus Count
    Collections
    Journal of Range Management, Volume 48, Number 5 (September 1995)

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