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    • Journal of Range Management, Volume 41 (1988)
    • Journal of Range Management, Volume 41, Number 3 (May 1988)
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    Effect of defoliation frequency and N-P-K fertilization on maidencane

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    Author
    Kalmbacher, R. S.
    Martin, F. G.
    Issue Date
    1988-05-01
    Keywords
    yield factors
    potassium fertilizers
    phosphorus fertilizers
    varieties
    grassland improvement
    Panicum
    frequency
    fertilizer application
    nitrogen fertilizers
    Florida
    cutting
    range management
    defoliation
    dry matter
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    Citation
    Kalmbacher, R. S., & Martin, F. G. (1988). Effect of defoliation frequency and NPK fertilization on maidencane. Journal of Range Management, 41(3), 235-238.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/645166
    DOI
    10.2307/3899175
    Additional Links
    https://rangelands.org/
    Abstract
    Maidencane (Panicum hemitomon Schult.), an important grass on Florida and southeastern Gulf Coast fresh-water marsh range, was cut on 3-, 6-, 9-, 12- and 24-week intervals (T) from June to December 1982 and 1983. Half the plots were fertilized every 6 weeks with 56, 12, and 22 kg/ha N, P, and K, respectively. Dry matter yield (DM), tiller density (TD), rhizome total nonstructural carbohydrate (TNC), crude protein (CP), and in vitro organic matter digestibility (IVOMD) were determined. DM was reduced with frequent clipping, especially every 3 weeks, and 2-year average DM was described: 1981 + 660T -22T2, where T is weeks between harvest. Fertilized grass yielded more DM (6,270 kg/ha) than unfertilized (4,410). TD increased as harvest interval increased. For example TD in April 1983 was TD = 40 + 19.1T. TNC was affected by cutting interval (7.2 + 0.61T - $0.016T2) but not fertilization. CP and IVOMD declined about 0.5 and 3.0 units, respectively, for each week forage remained on range. Fertilization improved 2-year average CP (yes = 13.3%, no = 11.9%), but IVOMD was unaffected. Defoliation of maidencane every 3 to 6 weeks reduced stands and yield, and defoliation intervals longer than 3 to 6 weeks resulted in reduced protein and digestibility. Fertilizer rates and timing of application used in this study did help to maintain yield and tiller density at a higher level than unfertilized grass in the second year.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3899175
    Scopus Count
    Collections
    Journal of Range Management, Volume 41, Number 3 (May 1988)

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