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    • Journal of Range Management, Volume 54 (2001)
    • Journal of Range Management, Volume 54, Number 2 (March 2001)
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    Supplemental polyethylene glycol influences preferences of goats browsing blackbrush

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    Author
    Titus, C. H.
    Provenza, F. D.
    Perevolotsky, A.
    Silanikove, N.
    Rogosic, J.
    Issue Date
    2001-03-01
    Keywords
    Coleogyne ramosissima
    woody weeds
    polyethylene glycol
    nutrient content
    stems
    brush control
    selective grazing
    tannins
    goats
    Juniperus
    feeding preferences
    zero grazing
    tannins
    macronutrients
    intake
    shrubs
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    Citation
    Titus, C. H., Provenza, F. D., Perevolotsky, A., Silanikove, N., & Rogosic, J. (2001). Supplemental polyethylene glycol influences preferences of goats browsing blackbrush. Journal of Range Management, 54(2), 161-165.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643850
    DOI
    10.2307/4003177
    10.2458/azu_jrm_v54i2_titus
    Additional Links
    https://rangelands.org/
    Abstract
    Supplemental polyethylene glycol (PEG) increases intake of foods high in tannins, but it is not known if PEG affects preference when herbivores forage on a variety of foods that differ in concentrations of macronutrients and tannins. We investigated how macronutrients, tannins, and PEG affected preferences of goats (Caprus hircus) for current season's and older growth twigs from the shrub blackbrush (Coleogyne ramosissima Torr.). In blackbrush, current season's twigs are higher than older twigs in macronutrients, but goats prefer older twigs because high levels of tannins in current season's twigs decrease preference. We conducted a pen trial and a paddock trial. During the 7-day pen trial, goats were offered current season's twigs and older twigs throughout the day. Eight goats were supplemented with 20 g PEG mixed with 100 g ground alfalfa (Medicago sativa L.) pellets, and 8 goats were supplemented with 100 g ground alfalfa pellets. Goats supplemented with PEG ate more current season's twigs than goats that did not receive PEG (P = 0.04). During the 17-day paddock trial, 10 goats were supplemented with 50 g PEG mixed with ground alfalfa/barley (Hordeum vulgare L.), and 10 goats were supplemented with ground alfalfa/barley. Goats supplemented with PEG preferred current season's to older twigs, whereas PEG-unsupplemented goats preferred older to current season's twigs (P = 0.0001). Goats had equal preference for juniper (Juniperus osteosperma Torr.) trees (P = 0.243). Collectively, our findings show that supplemental PEG can change food preferences.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003177
    Scopus Count
    Collections
    Journal of Range Management, Volume 54, Number 2 (March 2001)

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