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      Effect of vitamin D3 on calcium homeostasis of beef steers

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      Aranda-Osorio_Gilberto_2002..pdf (10.04Mb)
      Date
      2002-09-01
      Author
      Aranda-Osorio, Gilberto
      Type
      Thesis
      Degree Level
      Doctoral
      Metadata
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      Abstract
      Supplementation of high levels of vitamin D3 (D3) to cattle has enhanced beef tenderness. However, high levels of D3 possess a food safety concern. Therefore, the objective of this thesis was to evaluate feeding strategies that would reduce the amount of D3 required to increase serum calcium (Ca) to levels where tenderness has been improved. In experiment 1, 15 steers (452 ±30kg) were fed with 75% barley grain-base concentrate and 25% barley silage (as fed) and 1.25,2.5 or 5 MIU D3/hd/d for 7 d. Feed intake was depressed (P
      Degree
      Doctor of Philosophy (Ph.D.)
      Department
      Animal and Poultry Science
      Program
      Animal and Poultry Science
      Supervisor
      McKinnon, John J.
      Committee
      McAllister, Timothy; Laarveld, Bernard; Jansen, E.; Christensen, David A.; Boles, Jane Ann; Okine, Erasmus
      Copyright Date
      September 2002
      URI
      http://hdl.handle.net/10388/etd-07252008-141104
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      • Graduate Theses and Dissertations
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