| Title: |
401 Dietary Starch Dilution Strategies to Improve Feedlot Cattle Performance and Rumen Health |
| Authors: |
Kobza, Anna M; Young, James D; Richeson, John T; Lawrence, Ty E; Tennant, Travis C; Samuelson, Kendall L |
| Source: |
Journal of Animal Science ; volume 101, issue Supplement_3, page 328-328 ; ISSN 0021-8812 1525-3163 |
| Publisher Information: |
Oxford University Press (OUP) |
| Publication Year: |
2023 |
| Description: |
This study evaluated starch dilution with different sources of fiber from terminal implant to harvest on feedlot cattle performance, rumen buffering characteristics, and carcass outcomes. Steers (n = 416) were allocated to 48 pens in a randomized complete block design and assigned to 1 of 4 dietary treatments. Treatments were steam-flaked corn-based diets: CON; 7.5% corn stalks fed for the entire feeding period or CON followed by CS; 14.8% corn stalks, WD; 9.5% wet distillers grains with solubles and 7.5% corn stalks, or NR; 19.0% wet distillers grains with solubles and 0.0% corn stalks fed from terminal implant to harvest. Steers were transitioned to CS, WD, and NR over 6 d using a two-ration system. Within each pen, 2 steers received an indwelling rumen pH bolus and a 3-axis accelerometer ear-tag to quantify rumination. Treatment differences were considered statistically significant when P < 0.10. Dry matter (DM) and metabolizable energy (ME) intake were greatest for cattle consuming CS, intermediate for WD and CON, and least for NR (P < 0.01). The average daily gain (ADG) did not differ among treatments (P = 0.18); however, feed efficiency (G:F) was least for NR, intermediate for WD, and greatest for CS and CON (P = 0.10). Steers consuming CS had more (P = 0.08) 12th rib fat than NR, WD, or CON, but no other differences (P ≥ 0.24) in carcass characteristics were observed. A treatment × day interaction (P < 0.01) was observed for daily rumination time and ruminal pH. Results suggest that increasing the concentration of corn stalks in the diet post-terminal implant increased DM and ME intake and rumination; replacing corn stalks with wet distillers grains with solubles improved G:F and reduced rumination with minimal impacts on ruminal pH. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1093/jas/skad281.393 |
| Availability: |
https://doi.org/10.1093/jas/skad281.393; https://academic.oup.com/jas/article-pdf/101/Supplement_3/328/52957690/skad281.393.pdf |
| Rights: |
https://academic.oup.com/pages/standard-publication-reuse-rights |
| Accession Number: |
edsbas.6099E300 |
| Database: |
BASE |