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    • Journal of Range Management, Volume 52 (1999)
    • Journal of Range Management, Volume 52, Number 4 (July 1999)
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    First limiting nutrient for summer calving cows grazing autumn-winter range

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    Author
    Lardy, G. P.
    Adams, D. C.
    Klopfenstein, T. J.
    Clark, R. T.
    Issue Date
    1999-07-01
    Keywords
    soybean hulls
    tallow
    feather meal
    maize steep liquor
    protected protein
    digestible protein
    pregnancy rate
    breeding season
    birth weight
    dietary protein
    body condition
    liveweight gain
    calves
    ambient temperature
    body weight
    fiber content
    rain
    Nebraska
    beef cows
    soybean meal
    protein intake
    digestibility
    feed supplements
    grazing
    forage
    feed intake
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    Citation
    Lardy, G. P., Adams, D. C., Klopfenstein, T. J., & Clark, R. T. (1999). First limiting nutrient for summer calving cows grazing autumn-winter range. Journal of Range Management, 52(4), 317-326.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643944
    DOI
    10.2307/4003540
    Additional Links
    https://rangelands.org/
    Abstract
    Two trials were conducted in 1994, 1995, and 1996 to determine the first limiting nutrient for summer calving cows grazing Sandhills range. In Trial 1, 48 lactating summer calving cows grazing native range during the breeding season were assigned to 1 of 4 supplement treatments: 1) control-no supplement, 2) energy, 3) degradable intake protein (DIP), and 4) DIP + undegraded intake protein (UIP). Cows were group-fed supplements in 8 pastures (2 pastures/treatment). The trial began 4 September and ended 4 November each year. Diet samples from esophageally fistulated cows averaged 7.5% crude protein and 54.5% in vitro organic matter digestibility. Supplemented cows lost less body condition compared to control cows (P = 0.04). Cow and calf weight gains were increased by supplemental DIP or DIP + UIP combination compared to energy supplement (P = 0.09 and 0.08, respectively). Forage intake and digestibility were not different among treatments (P > 0.20). Milk production was lower for non-supplemented than supplemented cows (P = 0.10). Trial 2 began 5 November and ended 10 January in 1994-1995, 1995-1996, and 1996-1997. Treatments and pastures were the same as described in Trial 1, however, only 40 cows were used. In Trial 2, diet samples from esophageally fistulated cows averaged 6.2% crude protein and 52.3% in vitro organic matter digestibility. No differences (P > 0.10) in body condition score were detected. Total organic matter intake was lower for control compared to supplemented treatments (13.5 vs.15.5 kg day(-1); P < 0.10). We concluded that DIP was the first limiting nutrient for summer calving cows during the breeding season and during autumn-winter lactation after the breeding season.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003540
    Scopus Count
    Collections
    Journal of Range Management, Volume 52, Number 4 (July 1999)

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