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Comparison of Bite-Count and Rumen Evacuation Techniques to Estimate Cattle Diet Quality
Author
Damiran, Daalkhaijav
DelCurto, Timothy
Findholt, Scott L.
Johnson, Bruce K.
Vavra, Martin
Publisher
Society for Range Management
Publication Year
2013-01-01
Body

We conducted a study to compare the bite-count technique (BC) of estimating forage intake and synthesized diet quality to direct estimates of diet quantity and quality with the use of the rumen evacuation technique (RE). We used four rumen-fistulated steers to evaluate both techniques. Four enclosures in a mixed-conifer rangeland were used. Each enclosure contained two 0.25-ha paddocks that were either nonstocked or stocked by cattle to remove 32+/-4% of standing crop. We recorded bite-count data during foraging bouts for each steer in each paddock, and then evacuated each rumen following each foraging bout during summer (August). Paddocks stocked prior to each 20-min trial had a reduced (P<0.05) quantity offorage consumed regardless of technique. BC and RE gave similar (P>0.10) results on diet quantity and digestibility. However, BC-derived estimates were lower (P<0.05) for crude protein (CP), acid detergent fiber (ADF), ash, and neutraldetergent fiber (NDF). In summary, although BC has the advantage of not requiring rumen-fistulated animals, it did not yield comparable results to RE under range conditions with dense and diverse vegetation. Therefore, investigators should calibrate bite-count technique against fistula technique to solve any accuracy problem in their specific experimental conditions whenever possible. The Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.2111/REM-D-12-00046.1
Additional Information
Damiran, D., DelCurto, T., Findholt, S. L., Johnson, B. K., & Vavra, M. (2013). Comparison of Bite-Count and Rumen Evacuation Techniques to Estimate Cattle Diet Quality. Rangeland Ecology & Management, 66(1), 106-109.
ISSN
0022-409X
OAI Identifier
oai:repository.arizona.edu:10150/642693
Journal Volume
66
Journal Number
1
Journal Pages
106-109
Collection
Rangeland Ecology & Management (REM)
Journal Name
Rangeland Ecology & Management
Keywords
diet sampling
diet selection
foraging trials
free-ranging animals
mixed-conifer rangeland