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    Nutritional value and intake of prickly pear by goats

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    Author
    McMillan, Z.
    Scott, C. B.
    Taylor, C. A.
    Huston, J. E.
    Issue Date
    2002-03-01
    Keywords
    Opuntia
    organic matter
    nitrogen balance
    training (animals)
    Opuntia phaeacantha
    opuntia rufida
    weed control
    voluntary intake
    selective grazing
    prescribed burning
    digestibility
    crude protein
    goats
    nutritive value
    Opuntia
    food novelty
    learning
    diet preference
    browsing
    protein
    nitrogen balance
    forage digestibility
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    Citation
    McMillan, Z., Scott, C. B., Taylor, C. A., & Huston, J. E. (2002). Nutritional value and intake of prickly pear by goats. Journal of Range Management, 55(2), 139-143.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643639
    DOI
    10.2307/4003349
    10.2458/azu_jrm_v55i2_mcmillan
    Additional Links
    https://rangelands.org/
    Abstract
    Prickly pear (Opuntia sp.) is both a benefit and hindrance to the livestock industry in the southwestern U.S. It competes with herbaceous forage but is sometimes used as emergency feed during drought. Spineless prickly pear (O. fiscus-indica Engelm. and O. rufida Engelm.) has been planted in some regions of the southwest but little is known about its nutritional value. Our objectives were to determine: (1) the nutritional value of both spined (O. macrorhiza Engelm.) and spineless prickly pear (O. rufida Engelm.); (2) if goats can be conditioned to eat prickly pear after prescribed burning; and, (3) if goats would consume prickly pear when alternative forage was available. In Experiment 1, 8 goats were placed in metabolism stalls and fed either spineless or spined prickly pear with singed spines in both summer and winter. Intake, digestibility, and nitrogen balance were measured. In Experiment 2, 18 goats were placed in individual pens, and 9 were fed spineless prickly pear to determine if this increased acceptance of spined prickly pear with singed spines. In the third experiment, we varied the amount of alfalfa pellets fed to goats (below, near, and above maintenance) to determine if level of alfalfa intake affected prickly pear intake. Spineless prickly pear was higher (P < 0.05) in digestibility and crude protein than singed prickly pear, but nitrogen balance was similar for goats consuming the 2 species. Goats ate more spineless prickly pear on an as fed basis, but on a dry basis, intake was similar. Familiarity with spineless prickly pear increased (P < 0.05) subsequent intake of singed prickly pear. Level of alfalfa intake did not affect prickly pear intake. We concluded that both species are moderately nutritious, spineless prickly pear is more digestible than spined prickly pear, and once a preference for prickly pear has developed, goats may continue to eat prickly pear even though other forage is available.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003349
    Scopus Count
    Collections
    Journal of Range Management, Volume 55, Number 2 (March 2002)

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