Effect of dry matter intake restriction on energy balance, ruminal fermentation, and nutrient retention by beef steers

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Effect of dry matter intake restriction on energy balance, ruminal fermentation, and nutrient retention by beef steers

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/4243

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dc.contributor.advisor Olson, KC, M. S., Ph. D. en
dc.contributor.author Clark, Jonathan H. en_US
dc.date.accessioned 2010-01-12T16:45:23Z
dc.date.available 2010-01-12T16:45:23Z
dc.date.issued 2005 en_US
dc.date.submitted 2005 Fall en
dc.identifier.other ClarkJ-051706-T3068 en_US
dc.identifier.uri http://hdl.handle.net/10355/4243
dc.description The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. en_US
dc.description Title from title screen of research.pdf file viewed on (December 12, 2005) en_US
dc.description Includes bibliographical references. en_US
dc.description Thesis (M.S.) University of Missouri-Columbia 2005. en_US
dc.description Dissertations, Academic -- University of Missouri--Columbia -- Animal sciences. en_US
dc.description.abstract Two studies were conducted to determine the effects of DMI restriction on digestion and metabolism by feedlot steers. In Trial 1, 12 Angus X steers (BW [almost equal to] 450 [plus or minus] 18 kg) were assigned randomly to one of three diets that were formulated to promote a 1.6 kg ADG at intake levels corresponding approximately to 100% (AL), 90% (IR90), or 80% (IR80) of ad libitum DMI. In Trial 2, 12 crossbred steers (BW = 445 [plus or minus] 56 kg) fitted with ruminal cannulae were randomly assigned to one of two diets that were formulated to promote a 1.6 kg ADG at either AL or IR80. All diets delivered similar total NE, MP, Ca, and P per day. During both trials, fecal DM output by IR80 was less (P[greater than or equal to] 0.03) than that of AL; IR90 was similar (P[greater than ]0.10) to AL during trial 1. Digestion of DM by IR80 cattle was greater (P[greater than] 0.01) than that of AL during both trials; IR90 was similar (P[greater than]0.10) to AL during trial 1. Metabolizable energy intake (MEI) was similar (P[greater than or equal to] 0.20) between treatments during both trials, whereas P retention was similar (P=0.46) between treatments during trial 2. Total VFA and the molar proportion of acetate of AL were greater (P[greater than]0.03) than that of IR80 during trial 2; however, IR80 had a greater (P[almost equal to]0.03) molar proportion of propionate. Fluid dilution rate was similar (P=0.42) between treatments during trial 2. Under the conditions of these studies, restricting DMI while holding energy and protein intake constant decreased manure production and changed ruminal fermentation patterns in finishing steers. Improvements in performance associated with programmed-feeding regimes of the type studied here do not appear to be related to changes in diet digestion or MEI. en_US
dc.language.iso en_US en_US
dc.publisher University of Missouri--Columbia en_US
dc.subject.lcsh Cattle -- Feeding and feeds en_US
dc.title Effect of dry matter intake restriction on energy balance, ruminal fermentation, and nutrient retention by beef steers en_US
dc.type Thesis en_US
thesis.degree.discipline Animal sciences en_US
thesis.degree.grantor University of Missouri--Columbia en_US
thesis.degree.name M.S. en_US
thesis.degree.level Masters en_US
dc.identifier.merlin .b57313222 en_US
dc.relation.ispartofcommunity University of Missouri-Columbia. Graduate School. Theses and Dissertations. Theses. 2005 Theses
dc.relation.ispartofcollection 2005 Freely available theses (MU)


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