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    Temperature effects on regrowth of 3 rough fescue species

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    Author
    King, J. R.
    Hill, M. J.
    Willms, W. D.
    Issue Date
    1998-07-01
    Keywords
    Yukon Territory
    Festuca hallii
    Festuca altaica
    leaf area
    roots
    Festuca campestris
    shoots
    ambient temperature
    Alberta
    harvesting frequency
    tillers
    biomass production
    defoliation
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    Citation
    King, J. R., Hill, M. J., & Willms, W. D. (1998). Temperature effects on regrowth of 3 rough fescue species. Journal of Range Management, 51(4), 463-468.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644184
    DOI
    10.2307/4003335
    Additional Links
    https://rangelands.org/
    Abstract
    Three species of rough fescue, alpine rough fescue (Festuca altaica Trin.), mountain rough fescue (F. campestris Rydb.), and plains rough fescue (F. hallii (Vasey) Piper) were grown for 12 weeks under 5 temperature regimes — 7:3, 12:8, 17:13, 22:18, and 27:23 degrees C — and defoliated 3 times to 3.5 cm at 4-weekly intervals in a growth cabinet study. Final plant dry mass and harvestable biomass production were greatest at 17:13 degrees C for alpine rough fescue and plains rough fescue, and at 12:8 degrees C for mountain rough fescue. Harvestable biomass plateaued or declined at the final harvest in all species for temperatures above 12:8 degrees C. Tiller numbers increased at successive harvests. Biomass per tiller declined markedly at the final harvest of alpine rough fescue at all temperatures. Regrowth in alpine rough fescue was markedly reduced at temperatures either above or below the optimum. The results indicate that mountain rough fescue and plains rough fescue are better able to regrow following defoliation at temperatures below or equal to their optima, than at temperatures above their optima. This provides greater understanding of field responses in both species where frequent defoliations are more deleterious after the April/May period when temperatures are above optimal.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003335
    Scopus Count
    Collections
    Journal of Range Management, Volume 51, Number 4 (July 1998)

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