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    • Journal of Range Management, Volume 36 (1983)
    • Journal of Range Management, Volume 36, Number 2 (March 1983)
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    Reducing seed dormancy in Indian ricegrass [Oryzopsis hymenoides]

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    Author
    Zemetra, R. S.
    Havstad, C.
    Cuany, R. L.
    Issue Date
    1983-03-01
    Keywords
    Canada
    United States
    revegetation
    forage crops
    
    Metadata
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    Citation
    Zemetra, R. S., Havstad, C., & Cuany, R. L. (1983). Reducing seed dormancy in Indian ricegrass [Oryzopsis hymenoides]. Journal of Range Management, 36(2), 239-241.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/646075
    DOI
    10.2307/3898173
    Additional Links
    https://rangelands.org/
    Abstract
    Indian ricegrass [Oryzopsis hymenoides (Roem. and Schult.) Ricker] is an excellent native species for revegetation of coal and oil shale sites. However, inadequate germination due to a high seed dormancy results in poor stand development and limits its use. This paper presents the results of a series of experiments attempting to reduce the dormancy by weakening the lemma and palea by scarification of the seed covering. Four treatments (three mechanical and one concentrated sulfuric acid) were examined, alone and in combination with gibberellic acid. Three ages of seed were tested in the greenhouse, the laboratory and the field. Concentrated sulfuric acid and a modified commercial scarifier most effectively increased germination in the greenhouse; gibberellic acid enhanced germination of the younger, fresher seeds in this environment. A rubbing machine improved emergence in the field more than the other treatments. It was, however, only a modest improvement. Concentrated sulfuric acid decreased field emergence for all 3 ages of seed. Germination studies in the laboratory indicated that none of the treatments increased mortality.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3898173
    Scopus Count
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    Journal of Range Management, Volume 36, Number 2 (March 1983)

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