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    • Journal of Range Management, Volume 46 (1993)
    • Journal of Range Management, Volume 46, Number 3 (May 1993)
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    Technical Notes: Botanical components of annual Mediterranean grassland as determined by point-intercept and clipping methods

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    Author
    Glatzle, A.
    Mechel, A.
    Va, M. E.
    Issue Date
    1993-05-01
    Keywords
    Portugal
    determination
    specific contribution
    percentage contribution
    percentage of sward
    sward
    evaluation
    measurements
    pastures
    botanical composition
    
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    Citation
    Glatzle, A., Mechel, A., & Va, M. E. (1993). Technical notes: Botanical components of annual Mediterranean grassland as determined by point-intercept and clipping methods. Journal of Range Management, 46(3), 271-274.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644642
    DOI
    10.2307/4002620
    Additional Links
    https://rangelands.org/
    Abstract
    Three methods for determining proportions of botanical components, i.e., grasses, legumes, and forbs (nonleguminous dicots), of continuously grazed Mediterranean pastures were compared. Percentage contribution to dry matter yield was determined by sample clipping and separating into botanical components. Both percentage of sward and specific contribution were determined by the point-intercept method. These were defined by the relative contribution of 1 botanical component to the total number of counted intercepts between 200 pins inserted vertically into the sward and all botanical components. For specific contribution only the number of pins contacted by the various botanical components were considered, whereas for percentage of sward even multiple contacts between a pin and plant parts of a particular botanical component were taken into account. Percentage contribution was highly significantly correlated with percentage of sward (R = 0.92) and specific contribution (R = 0.93) running the analyses across all botanical components, although there was a significant trend to underestimate forbs and overestimate legumes by the point-intercept methods. It is concluded, however, that for most practical purposes determination of specific contribution, the least laborious method, should give satisfactory estimates of percentage contribution.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002620
    Scopus Count
    Collections
    Journal of Range Management, Volume 46, Number 3 (May 1993)

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