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    • Journal of Range Management, Volume 44 (1991)
    • Journal of Range Management, Volume 44, Number 1 (January 1991)
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    Some effects of precipitation patterns on mesa dropseed phenology

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    Author
    Gibbens, R. P.
    Issue Date
    1991-01-01
    Keywords
    Sporobolus flexuosus
    Chihuahuan Desert
    crop growth stage
    Sporobolus
    deserts
    growth rate
    precipitation
    adaptability
    phenology
    rangelands
    pasture plants
    New Mexico
    plant height
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    Citation
    Gibbens, R. P. (1991). Some effects of precipitation patterns on mesa dropseed phenology. Journal of Range Management, 44(1), 86-90.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644933
    DOI
    10.2307/4002646
    Additional Links
    https://rangelands.org/
    Abstract
    Phenology of mesa dropseed [Sporobolus flexuosus (Thurb.) Rydb.] was studied from 1979 to 1987 on the Jornada Experimental Range in southern New Mexico. Growing season (March through November) precipitation ranged from 99 to 308 mm during the 8-year period. Foliage height and number of leaves were recorded weekly for individually marked culms on 20 plants. New culms usually appeared during the first week in March and green leaf tissue often persisted until the end of November. Correlation analyses of accumulated weekly height increments and accumulated weekly precipitation showed that growth was highly dependent upon rainfall (r = 0.81 to 0.97). Leaf formation was also correlated with rainfall (r = 0.79 to 0.98). Even in relatively wet years tbere were 1 or 2 periods of no growth. In drier years, no growth periods totaled as much as 87 days. Periods of rapid growth occurred only after rainfall events > 13 mm. The first exsertion of seed heads occurred as early as the last week of July and as iate as the second week of October. The temporal plasticity of mesa dropseed phenology indicates that it is well adapted to the arid environment.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002646
    Scopus Count
    Collections
    Journal of Range Management, Volume 44, Number 1 (January 1991)

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