Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Hill-Ward, Stephanie
Committee Member
Rude, Brian
Committee Member
Williams, Cathleen
Date of Degree
5-11-2013
Document Type
Graduate Thesis - Open Access
Major
Animal Nutrition
Degree Name
Master of Science (M.S.)
College
College of Agriculture and Life Sciences
Department
Department of Animal and Dairy Sciences
Abstract
This study was conducted to determine the effect of modified crude protein (CP) concentrations and a supplemental directed microbial in the milk replacer fed to Holstein calves during elevated ambient temperatures. Fortyour Holstein calves were randomly assigned treatments in a 2x2 factorial arrangement of treatments. Weekly and daily measurements were taken and analyzed using PROC MIXED in SAS. Calves fed increased CP concentrations in the milk replacer had greater body weight and frame measurements during the pre-weaning phase and at weaning. Directed microbial supplementation led to increased ADG during the post-weaning phase. Directed microbial supplementation and milk replacer modification helped alleviate heat stress through decreased rectal temperatures and rectal scores. Directed microbial supplementation increased fecal scores. Calves fed the control diet had greater volatile fatty acid concentrations in the rumen fluid, showing signs of increased rumen papillae development.
URI
https://hdl.handle.net/11668/18118
Recommended Citation
Geiger, Adam J., "Increasing Milk Replacer Crude Protein Concentrations with or without Direct-Fed Microbial Supplementation on Pre-Weaned Holstein Calves during Heat Stress" (2013). Theses and Dissertations. 2686.
https://scholarsjunction.msstate.edu/td/2686
Comments
calves||directed microbials||milk replacer