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    • Journal of Range Management, Volume 42 (1989)
    • Journal of Range Management, Volume 42, Number 5 (September 1989)
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    Mineral dynamics in beef cattle diets from a southern mixed-grass prairie

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    Author
    Pinchak, W. E.
    Greene, L. W.
    Heitschmidt, R. K.
    Issue Date
    1989-09-01
    Keywords
    mineral content
    dietary minerals
    Texas
    beef cattle
    forage
    
    Metadata
    Show full item record
    Citation
    Pinchak, W. E., Greene, L. W., & Heitschmidt, R. K. (1989). Mineral dynamics in beef cattle diets from a southern mixed-grass prairie. Journal of Range Management, 42(5), 431-433.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/645043
    DOI
    10.2307/3899556
    Additional Links
    https://rangelands.org/
    Abstract
    Acute and chronic dietary deficiencies in macro and micro minerals have significant impacts on production efficiency on rangelands throughout the world. However, limited information is available on the mineral quality of diets primarily because salivary and soil mineral contamination of esophageal extrusa precludes quantitative recovery of dietary minerals. Mineral profiles of diets can be estimated indirectly, however, if forage species composition of diets and mineral concentrations of selected forages are known. The objective of this study was to utilize this approach to estimate seasonal dynamics of phosphorus (P), calcium (Ca), potassium (K), and magnesium (Mg) in cattle diets' relative requirements. Two diet selection scenarios were developed: the first, maximum mineral intake, assumed cattle consumed only live plant tissue of a forage if it was available; the second, considered minimum mineral intake, assumed cattle consumed live and dead tissue in direct proportion to their availability. Calculated concentrations of P and Ca in diets showed P concentrations were below and Ca concentrations were above their respective requirements for spring calving cows regardless of selection scenario or season of the year. However, K and Mg concentrations varied as a function of selection scenario and season of year and ranged from adequate during periods of rapid vegetation growth to marginally inadequate during periods of water (drought) or temperature (winter) induced dormancy.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3899556
    Scopus Count
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    Journal of Range Management, Volume 42, Number 5 (September 1989)

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