Comparison of Bite-Count and Rumen Evacuation Techniques to Estimate Cattle Diet Quality Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/9p290b359

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by The Society for Range Management and can be found at:  http://www.rangelands.org/.

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  • 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 of forage 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 neutral detergent 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.
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  • 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. doi: 10.2111/REM-D-12-00046.1
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  • description.provenance : Made available in DSpace on 2013-03-04T18:43:59Z (GMT). No. of bitstreams: 1 DelCurtoTimothyAnimalScienceComparisonBiteCount.pdf: 195659 bytes, checksum: 34501b678aba9ff2c0687ca69c888eaa (MD5) Previous issue date: 2013-01
  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2013-03-04T18:43:59Z (GMT) No. of bitstreams: 1 DelCurtoTimothyAnimalScienceComparisonBiteCount.pdf: 195659 bytes, checksum: 34501b678aba9ff2c0687ca69c888eaa (MD5)
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2013-03-04T18:28:18Z No. of bitstreams: 1 DelCurtoTimothyAnimalScienceComparisonBiteCount.pdf: 195659 bytes, checksum: 34501b678aba9ff2c0687ca69c888eaa (MD5)

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