Intensified Calf Feeding Programs for Purebred and Crossbred Calves
|dc.contributor.author||Phillips, Josette M.||en_US|
In the first experiment, 132 Jersey calves were assigned to one of three diets on three farms. Diet 20/20, 28/25, and 28/20 were milk replacers (MR) consisting of 20%, 28%, and 28% CP, and 20%, 25%, and 20% fat, respectively. Diet 20/20 was reconstituted at 10% DM solids, whereas diets 28/25 and 28/20 were reconstituted at 12.5% DM solids. Body weight, body length, hip height, wither height, heart girth, and hip width were measured weekly. An initial plasma sample was analyzed for IgG concentration to test for passive immunity. Calves remained on study for 8 wk.
Body weight gain, ADG, total weight gain, and stature measurements were greatest for calves fed 28/25 and lowest for calves fed diet 20/20, whereas calves fed 28/20 were intermediate.
In the second experiment, 70 calves were assigned to one of two treatments. Calves included purebred Holsteins, Jerseys, and crossbred reciprocals. Calves were assigned to diet 20/20, which was reconstituted to 10% DM solids or diet 28/20, which was reconstituted to 13% DM solids. Body weight, body length, hip and wither heights, heart girth, and hip width were measured weekly. Plasma samples were collected weekly for analysis of PUN, glucose, and total proteins. Body weight gain, ADG, and total weight gain were greatest for calves fed 28/20 and least for calves fed diet 20/20. Therefore, feeding calves a 20/20 MR at 10-15% of their BW results in lower BW gain, ADG, total weight gain, and stature measurements.
|dc.rights||I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.||en_US|
|dc.title||Intensified Calf Feeding Programs for Purebred and Crossbred Calves||en_US|
|dc.description.degree||Master of Science||en_US|
|thesis.degree.name||Master of Science||en_US|
|thesis.degree.grantor||Virginia Polytechnic Institute and State University||en_US|
|dc.contributor.committeechair||James, Robert E.||en_US|
|dc.contributor.committeemember||Polan, Carl E.||en_US|
|dc.contributor.committeemember||Swecker, William S. Jr.||en_US|
|dc.contributor.committeemember||McGilliard, Michael L.||en_US|
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