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    • Journal of Range Management, Volume 48, Number 3 (May 1995)
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    Grain supplementation on bluestem range for intensive-early stocked steers

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    Author
    Owensby, C. E.
    Cochran, R. C.
    Brandt, R. T.
    Vanzant, E. S.
    Auen, L. M.
    Clary, E. M.
    Issue Date
    1995-05-01
    Keywords
    feed conversion
    dressing percentage
    carcass weight
    sorghum
    Sorghastrum nutans
    warm-season grasses
    Schizachyrium scoparium
    Poa pratensis
    Kansas
    liveweight gain
    grazing experiments
    pastures
    Andropogon gerardii
    steers
    feed supplements
    biomass
    botanical composition
    grasses
    beef cattle
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    Citation
    Owensby, C. E., Cochran, R. C., Brandt, R. T., Vanzant, E. S., Auen, L. M., & Clary, E. M. (1995). Grain supplementation on bluestem range for intensive-early stocked steers. Journal of Range Management, 48(3), 246-250.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644401
    DOI
    10.2307/4002428
    Additional Links
    https://rangelands.org/
    Abstract
    A 4-year study was conducted on Kansas Flint Hills bluestem range to monitor animal gain, grass, and forb standing biomass following grazing, plant population dynamics, and in 2 years, subsequent feedlot performance of steers under intensive-early stocking supplemented with increasing levels of sorghum grain. Each year from 1988 through 1991, crossbred beef steers were stocked at 0.24 ha/100 kg of initial steer weight from 5 May to 1; July. Steers in twice-replicated pastures were given no supplementation, 0.91 kg rolled sorghum grain per head daily, or 1.82 kg rolled sorghum grain per head daily, which corresponded to approximately 0, 0.3, and 0.6% of body weight-1. All steers were implanted with estradiol 17 beta in 1988 and zeranol in 1989-91 during initial processing and had unlimited access to a lasalocid/mineral mixture during the entire trial. In 1989 and 1990, representative groups of steers selected from all treatment/pasture combinations were subjected to a feedlot finishing phase and carcass data were obtained. Grass and forb standing crops were estimated each year at livestock removal in mid-July and again in early October. Pretreatment species composition and basal cover were determined in 1988 and compared to those at the end of the study. In mid-July, when cattle were removed, residual standing biomass of grass increased in direct proportion to increasing level of supplement. Standing biomass of grass at the end of the growing season did not differ among pastures with different supplement levels. Forb standing biomass did not differ among pastures with different supplement levels in July or October. Changes in plant populations among treatments during the course of the study were minimal. During the early portion of the grazing period, sorghum grain supplementation did not significantly influence steer gains, but average daily gain during the latter part of the grazing period increased in direct proportion to increasing level of sorghum grain supplement. Daily gain. feed intake, carcass characteristics, and gain:feed ratio were not different among treatments during the feedlot phase. Although conversion efficiencies may be economically marginal, low-level grain supplementation has the potential to increase the daily gain of cattle grazing early-season tallgrass prairie under an intensive-early stocking program.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002428
    Scopus Count
    Collections
    Journal of Range Management, Volume 48, Number 3 (May 1995)

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