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    • Journal of Range Management, Volume 46 (1993)
    • Journal of Range Management, Volume 46, Number 5 (September 1993)
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    Soil water extraction and photosynthesis in Gutierrezia sarothrae and Sporobolus cryptandrus

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    Author
    Wan, C.
    Sosebee, R. E.
    McMichael, B. L.
    Issue Date
    1993-09-01
    Keywords
    Sporobolus cryptandrus
    drought tolerance
    Gutierrezia sarothrae
    photosynthesis
    soil water content
    canopy
    
    Metadata
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    Citation
    Wan, C., Sosebee, R. E., & McMichael, B. L. (1993). Soil water extraction and photosynthesis in Gutierrezia sarothrae and Sporobolus cryptandrus. Journal of Range Management, 46(5), 425-430.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644633
    DOI
    10.2307/4002661
    Additional Links
    https://rangelands.org/
    Abstract
    Broom snakeweed (Gutierrezia sarothrae Shinners), a C3 evergreen half-shrub, is a formidable competitor of grasses in the semiarid southwestern rangelands. Sand dropseed (Sporobolus cryptandrus (Toff.) Gray), perennial C4 bunchgrass, is the most drought resistant species in the short-grass prairie. A comparative study on soil water extraction patterns, photosynthesis, and canopy development in both species during spring-summer growing season of 1991 was conducted in pot- and field-grown plants. Sand dropseed extracts water at depths between 0 and 30 cm more effectively than broom snakeweed. In contrast, broom snakeweed can take up more water from the subsoil (30-60 cm) than sand dropseed. Photosynthesis in sand dropseed was more affected by soil water deficit than was broom snakeweed, which was related to their water extraction patterns. Leaf area accumulation of broom snakeweed was not affected by spring drought, but that of sand dropseed was reduced. Because of greater water extraction from the wetter subsoil by broom snakeweed during drought, it can assimilate more carbon and, therefore, prevail in a competitive relationship with sand dropseed.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002661
    Scopus Count
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    Journal of Range Management, Volume 46, Number 5 (September 1993)

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