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    • Journal of Range Management, Volume 45 (1992)
    • Journal of Range Management, Volume 45, Number 3 (May 1992)
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    Protein supplementation of steers grazing tobosa-grass in spring and summer

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    Author
    Pitts, J. S.
    McCollum, F. T.
    Britton, C. M.
    Issue Date
    1992-05-01
    Keywords
    urea
    blood
    protein status
    fecal nitrogen
    blood urea nitrogen
    Hilaria mutica
    cottonseed meal
    Prosopis glandulosa var. glandulosa
    liveweight gain
    feces
    spring
    steers
    summer
    protein supplements
    nitrogen content
    grazing
    beef cattle
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    Citation
    Pitts, J. S., McCollum, F. T., & Britton, C. M. (1992). Protein supplementation of steers grazing tobosa-grass in spring and summer. Journal of Range Management, 45(3), 226-231.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644768
    DOI
    10.2307/4002968
    Additional Links
    https://rangelands.org/
    Abstract
    A 3-year study evaluated weight gain, blood urea nitrogen (BUN), and fecal nitrogen (FN) of beef steers fed 0.00, 0.34, or 0.68 kg/hd/day of cottonseed meal (41% CP) while grazing mesquite (Prosopis glandulosa var. glandulosa Torr.)/tobosagrass (Hilaria mutica [Buckl.] Benth.) range between April and July. Mixed breed beef steers (avg wt 230 kg) were allocated to three 6-pasture grazing cells and group-fed prorated amounts of supplement 3 days a week. Individual weights were recorded every 21 days. Crude protein in clipped forage samples remained above 7.0% except in July, 1985 (6.5%). Gain response varied among periods within year but the primary effects occurred in the first 40 to 60 days of grazing. In 1985, daily gains over 92 days were 0.38, 0.44, and 0.67 kg/hd/day for the 0.00, 0.34, and 0.68 kg supplement groups, respectively. In 1986 and 1987, daily gains during 85-day trials were 0.65, 0.66, and 0.71 kg/hd/day and 0.98, 1.08, and 1.07 kg/hd/day, respectively. Blood and feces were collected from 10 steers in each treatment group on each weigh date during the first 2 years. The 0.68 kg/hd/day supplement maintained higher (P<0.05) BUN and FN than the control group but response to 0.34 kg supplement was inconsistent. Performance and BUN data suggested that protein concentrate was not the appropriate supplement for steers grazing tobosagrass in the spring and summer.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002968
    Scopus Count
    Collections
    Journal of Range Management, Volume 45, Number 3 (May 1992)

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