Date of Award
5-2017
Degree Type
Thesis
Degree Name
Master of Science - Agriculture
Department
Agriculture
First Advisor
Dr. Joey Bray
Second Advisor
Dr. Dale Perritt
Third Advisor
Dr. John Michael Mehaffey
Fourth Advisor
Dr. Karen Embry-Jenlink
Abstract
The objective of this study was to evaluate Bacillus megaterium, Bacillus licheniformis, and Bacillus subtilis, as probiotic strains compared to Bacitracin Methylene Disalicylate (BMD) 50 as the antibiotic growth promotor, supplemented in commercial broiler rations and their influences on performance, yield, and intestinal microbiota. This trial was completed as a randomized-block design with 4,800 birds split into 96, 5’x10’ pens, and randomly assigned to one of eight treatment groups. The birds were placed at a stocking density of 1.00 ft2/bird, (50 birds/pen), and reared on used pine shaving for 55 days. Throughout the study, bird performance, and intestine samples were measured. A yield study was completed at the end of the study to determine meat yield for all retail cuts. Results show treatment 3, (LS + AGP), which consisted of the following probiotics and antibiotic growth promotors: Bacillus licheniformus, Bacillus subtilis, and BMD with Maxiban in the starter and grower diets as the coccidiostat, performed better overall compared to the negative and positive control treatments.
Repository Citation
Glasscock, Justin M., "Evaluation of Different Probiotic Strains Supplemented in Commercial Broiler Rations and their Influences on Performance, Yield, and Intestinal Microbiota." (2017). Electronic Theses and Dissertations. 100.
https://scholarworks.sfasu.edu/etds/100
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Included in
Biochemistry Commons, Biosecurity Commons, Food Processing Commons, Meat Science Commons, Molecular Biology Commons, Poultry or Avian Science Commons
Tell us how this article helped you.
