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    Sphaeralcea angustifolia as a Substitute for Alfalfa for Growing Goats

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    Author
    Mellado, Miguel
    Salas, Gabriela
    Pittroff, Wolfgang
    Issue Date
    2008-07-01
    Keywords
    digestibility
    feed conversion ratio
    feed intake
    serum urea
    weight gain
    
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    Citation
    Mellado, M., Salas, G., & Pittroff, W. (2008). Sphaeralcea angustifolia as a Substitute for Alfalfa for Growing Goats. Rangeland Ecology & Management, 61(4), 405-411.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642967
    DOI
    10.2111/07-082.1
    Additional Links
    https://rangelands.org/
    Abstract
    Narrowleaf globemallow (Sphaeralcea angustifolia [Cav.] G. Don) occurs on millions of hectares of rangeland in the United States and Mexico, and it constitutes an important forage for herbivores. Forty 2-mo-old crossbred female goats (native 3 dairy goats; 9.4 +/- 2.2 kg) were randomly allotted to five dietary groups (two] goats per pen, four replications per ration) to evaluate the effects of feeding different levels of S. angustifolia in a complete ration on growth performance and diet digestibility. The rations were a total mixed control ration containing 0% S. angustifolia (T0) and four rations in which S. angustifolia progressively replaced alfalfa (25% [T25], 50% [T50], 75% [T75], and 100% [T100]). Grains and forage made up 70% and 30% of the dietary dry matter (DM) in all rations. Differences (P < 0.05) were observed between treatments in average daily gain (ADG; range 88-124 g d-1) and DM intake (DMI; range 3.3-4.0% body weight). Feed conversion ratio (DMI/ADG; range 4.0-4.8) was similar (P > 0.20) among treatments. Goats fed diets with any of the S. angustifolia levels had similar apparent nitrogen (N) digestion (range 67.6-69.8%) as those fed only alfalfa, but N retention was greater (P < 0.05) in goats on T25 and T50 diets compared to other diets. The apparent digestibilities of DM, neutral detergent fiber, and acid detergent fiber were greater (P < 0.05) for T25 and T50 than for other diets. Results indicate that S. angustifolia at the flowering stage was a savory and nutritious roughage, which could fully replace alfalfa hay in diets of growing goats. Considering that S. angustifolia is readily consumed by foraging animals, it is abundant enough that it is a significant source of forage, and has a sufficient quality to nutritionally satisfy herbivores, this forb is a potentially useful forage for pen-fed goats. 
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/07-082.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 61, Number 4 (July 2008)

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