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    Comparison of Bite-Count and Rumen Evacuation Techniques to Estimate Cattle Diet Quality

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    Author
    Damiran, Daalkhaijav
    DelCurto, Timothy
    Findholt, Scott L.
    Johnson, Bruce K.
    Vavra, Martin
    Issue Date
    2013-01-01
    Keywords
    diet sampling
    diet selection
    foraging trials
    free-ranging animals
    mixed-conifer rangeland
    
    Metadata
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    Citation
    Damiran, D., DelCurto, T., Findholt, S. L., Johnson, B. K., & Vavra, M. (2013). Comparison of Bite-Count and Rumen Evacuation Techniques to Estimate Cattle Diet Quality. Rangeland Ecology & Management, 66(1), 106-109.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642693
    DOI
    10.2111/REM-D-12-00046.1
    Additional Links
    https://rangelands.org/
    Abstract
    We conducted a study to compare the bite-count technique (BC) of estimating forage intake and synthesized diet quality to direct estimates of diet quantity and quality with the use of the rumen evacuation technique (RE). We used four rumen-fistulated steers to evaluate both techniques. Four enclosures in a mixed-conifer rangeland were used. Each enclosure contained two 0.25-ha paddocks that were either nonstocked or stocked by cattle to remove 32+/-4% of standing crop. We recorded bite-count data during foraging bouts for each steer in each paddock, and then evacuated each rumen following each foraging bout during summer (August). Paddocks stocked prior to each 20-min trial had a reduced (P<0.05) quantity offorage consumed regardless of technique. BC and RE gave similar (P>0.10) results on diet quantity and digestibility. However, BC-derived estimates were lower (P<0.05) for crude protein (CP), acid detergent fiber (ADF), ash, and neutraldetergent fiber (NDF). In summary, although BC has the advantage of not requiring rumen-fistulated animals, it did not yield comparable results to RE under range conditions with dense and diverse vegetation. Therefore, investigators should calibrate bite-count technique against fistula technique to solve any accuracy problem in their specific experimental conditions whenever possible.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/REM-D-12-00046.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 66, Number 1 (January 2013)

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