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Title: | Nitrogen Transactions in Ruminants | Contributor(s): | Nolan, JV (author) ; Dobos, RC (author) | Publication Date: | 2005 | Handle Link: | https://hdl.handle.net/1959.11/388 | Abstract: | The primary goal of ruminant nutritionists is to achieve maximum output of proteinaceous materials in products such as milk, meat and wool with a minimum of dietary crude protein (CP) inputs. In practice, this nitrogen (N) output to input ratio is relatively low. For example, it can vary from 13% for milk protein production in pasture-fed dairy cows (Wanjaiya et al., 1993) to 31% in dairy cows grazing on Lolium perenne based pasture (Delagarde et al., 1997). However, since 40-45% efficiency coefficients are theoretically possible in dairy cows (Van Vuuren and Meijs, 1987; Hvelplund and Madsen, 1995), there is scope for considerable improvement in nutritional management of our grazing livestock. Moreover, increasing the efficiency of use of protein N by livestock, leading to lower N excretion, is becoming an environmental imperative in many countries (Castillo et al., 2001). | Publication Type: | Book Chapter | Source of Publication: | Quantitative Aspects of Ruminant Digestion and Metabolism, p. 177-206 | Publisher: | CABI | Place of Publication: | Wallingford, United Kingdom | ISBN: | 0851998143 | Fields of Research (FoR) 2008: | 070204 Animal Nutrition | HERDC Category Description: | B1 Chapter in a Scholarly Book | Publisher/associated links: | http://www.cabi.org/datapage.asp?iDocID=228 http://books.google.com.au/books?id=OtyBDIpMm6kC |
Editor: | Editor(s): J. Dikstra, J.M. Forbes and J. France |
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Appears in Collections: | Book Chapter |
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