Evaluation of three sheep grazing systems on western Oregon hill pastures Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/5h73pz50s

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  • Sheep live weights, herbage standing crop, and herbage quality are presented from a three-year grazing management study comparing set stocking, four-paddock rotational grazing, and four-paddock forward rotational grazing systems. In both rotational grazing and forward rotational grazing systems, sheep were sequentially moved from one paddock to the next every 5 days. Lambs were weaned early at 12 to 15 weeks of age in the forward rotationally grazed system and from then on grazed one paddock ahead of the ewes. Herbage standing crop was consistently greater (P< 0.05) on the rotationally grazed system than on the set stocked system, averaging 38.4% more herbage in 1978, 32.8% more herbage in 1979, and 52.7% more herbage in 1980. No overall grazing system differences were found for the ewe live weight at the end of the grazing year between the rotationally grazed and the set stocked systems. Live weights of rotationally grazed lambs were superior to set stocked lambs only if the grazing pressure was high; otherwise no difference existed between these two systems. The forward rotationally grazed lambs generally had lower live weight gains than did the rotationally grazed lambs, perhaps due to weaning stress. A short discussion is presented on the advantages of high stocking rates on rotationally grazed pastures.
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  • description.provenance : Submitted by Kirsten Clark (kcscannerosu@gmail.com) on 2013-08-15T17:46:57Z No. of bitstreams: 1 WarnerJohnRobert1983.pdf: 1303120 bytes, checksum: 45ee78e4a30964a08a27259e1738a662 (MD5)
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