SDSU Beef Day 2022 Summary Publication
Document Type
Article
Publication Date
1-27-2022
Abstract
Study Description:
Single-sourced, newly weaned steers (n=256; initial BW=542 ± 3.7lb; n=64 steers/treatment; 8 steers/pen) were blocked by location in a 2×2 factorial arrangement of DFM (Certillus CP B1801 Dry; Bacillus subtilis, Lactobacillus plantarum; 28 g/steer·d-1) and YCW (Celmanax; 18 g/steer·d-1). Temperature-humidity index (THI) was calculated as: THI=0.81×ambient temperature+[relative humidity×(ambient temperature-14.40)]+46.40. On d-1 and 2 and d-21 and 22 on RH, respiration rate (RR) and panting scores (PS) were determined before and after AM and PM feedings (0700h, 1100h, 1400h, 1700h). RR (n=3 steers/pen) was calculated from: 600/seconds required for 10 flank movements. PS utilized this scoring system: 0 (not distressed) to 4.5 (severely distressed).
Pages
1
Publisher
South Dakota State University
Rights
© 2022 South Dakota Board of Regents
Recommended Citation
Gubbels, Erin; Francis, Forest; Hamilton, Thomas G.; Griffin, Jason; Rusche, Warren; Rehberger, Tom; Block, Elliot; and Smith, Zachary K. F., "Evaluation of a Direct Fed Microbial an an Enzymatically Hydrolyzed Yeast Product Fed Alone or in Combination to Beef Steers Administered Ractopamine Hydrochloride 28 Days Prior to Harvest During Summer Months in the Northern Plains" (2022). SDSU Beef Day 2022 Summary Publication. 16.
https://openprairie.sdstate.edu/sd_beefday_2022/16