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dc.contributor.authorGanskopp, Dave
dc.contributor.authorSvejcar, Tony
dc.contributor.authorTaylor, Fred
dc.contributor.authorFarstvedt, Jerry
dc.date.accessioned2020-09-18T04:47:14Z
dc.date.available2020-09-18T04:47:14Z
dc.date.issued2004-03-01
dc.identifier.citationGanskopp, D., Svejcar, T., Taylor, F., & Farstvedt, J. (2004). Can spring cattle grazing among young bitterbrush stimulate shrub growth?. Journal of Range Management, 57(2), 161-168.
dc.identifier.issn0022-409X
dc.identifier.doi10.2111/1551-5028(2004)057[0161:CSCGAY]2.0.CO;2
dc.identifier.doi10.2307/4003914
dc.identifier.doi10.2458/azu_jrm_v57i2_ganskopp
dc.identifier.urihttp://hdl.handle.net/10150/643517
dc.description.abstractDue to its palatability and forage quality, antelope bitterbrush (Purshia tridentata Pursh DC) is a desirable shrub across western US rangelands. Because little information is available regarding grazing management of young bitterbrush, a study was undertaken to explore stocking pressure thresholds and quantify effects of light and heavy spring cattle grazing on shrub growth. Rates of browsing and trampling and forage availability were monitored over 3 years in southeast Oregon. Across years, 29% of bitterbrush endured trampling in light-grazing treatments, and 55% experienced trampling under heavy grazing. Linear models relating time and cattle density successfully explained (r2 = 0.84-0.86) probabilities of bitterbrush being trampled. Forage utilization averaged 32% and 59% in lightly and heavily grazed units, and 14 and 62% of bitterbrush were browsed in lightly and heavily-grazed pastures, respectively. Cattle began browsing when herbaceous standing crop declined to 100-150 kg ha-1. Browsing in heavily-grazed pastures reduced diameters of bitterbrush by 4.5 to 9.5 cm in 1998 and 1999, but shrub height was unaffected. Lightly-grazed stands exhibited a 50% greater increase in bitterbrush diameter, 30% greater height increment, and 8% longer twigs than shrubs in ungrazed pastures. At the end of the 1997 and 1998 growing seasons, bitterbrush in heavily-grazed pastures were 11 cm greater in diameter than ungrazed controls and equal to shrubs in lightly-grazed pastures. To stimulate bitterbrush growth, young stands can be lightly-grazed (30 to 40% utilization of herbaceous forage) by cattle when bitterbrush is flowering and accompanying grasses are in vegetative to late-boot stages of phenology.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectPurshia tridentata
dc.subjectlivestock
dc.subjectbig game
dc.subjectwinter range
dc.subjectwildlife
dc.subjecthabitats
dc.subjectbrowse
dc.titleCan spring cattle grazing among young bitterbrush stimulate shrub growth?
dc.typetext
dc.typeArticle
dc.identifier.journalJournal of Range Management
dc.description.collectioninformationThe Journal of Range 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.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform August 2020
dc.source.volume57
dc.source.issue2
dc.source.beginpage161-168
refterms.dateFOA2020-09-18T04:47:15Z


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