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    • Journal of Range Management, Volume 43 (1990)
    • Journal of Range Management, Volume 43, Number 3 (May 1990)
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    Mefluidide effect on Caucasian bluestem leaves, stems, forage yield, and quality

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    Author
    White, L. M.
    Issue Date
    1990-05-01
    Keywords
    mefluidide
    leaves
    application timing
    stems
    protein content
    Bothriochloa bladhii
    sandy loam soils
    Oklahoma
    crude protein
    in vitro digestibility
    crop yield
    dry matter
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    Citation
    White, L. M. (1990). Mefluidide effect on Caucasian bluestem leaves, stems, forage yield, and quality. Journal of Range Management, 43(3), 190-194.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644894
    DOI
    10.2307/3898669
    Additional Links
    https://rangelands.org/
    Abstract
    'Caucasian’ bluestem [Rothriochloa caucasis (Trin.) C.E. Hubb.] provides high quality forage during early summer but growth of floral stems causes a rapid decline in forage quality. In 1985 and 1986 mefluidide [N-(2,4-dimethyl-S-{[(trifluromethyl)sulfonyl] amino)-phenyl)acetamide, a growth regulator, was applied to Caucasian in late May, early June, aud mid June at 0.00, 0.28, 0.56, and 0.84 kg/ha to determine which combination of date and rate of application would effectively decrease number of floral stems and yet increase forage quality. Caucasian was grown on a Pratt fine sandy loam (Thermic Pasammentic Haplustalfs) soil 6 km north of Fort Supply, Okla. Plots (1.5 by 5 m) were replicated 4 times in a randomized complete block design with a factorial treatment arrangement. Forage was harvested above a 6-cm stubble height in late July. On the control plots, the in vitro dry matter digestibility (IVDMD) and crude protein of leaves was 6.5 and 2.0 percentage units higher than stems. Leaves accounted for 40% of the forage yield the first year and 64% the second year. Mefluidide was most effective if applied late May. Response surface analysis showed that mefluidide (0.56 kg/ha) application in late May decreased number of floral stems 35 to 509, forage yields 20 to 251, and leaf yields 7 to 25%. In 1985, mefluidide had no effect on IVDMD and crude protein of leaves, stems, and whole plants. In 1986, application of 0.56 kg/ha mefluidide in late May increased leaf, stem, and whole plant IVDMD by 1.2, 2.7, and 2.0 percentage units and crude protein by 0.5 to 1 percentage units. Mefluidide did not decrease number of floral stems enough nor increase leaf yield and forage quality enough to be economically used on Caucasian to improve livestock gain during late July.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3898669
    Scopus Count
    Collections
    Journal of Range Management, Volume 43, Number 3 (May 1990)

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