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dc.contributor.authorZhang, J.
dc.contributor.authorRomo, J. T.
dc.date.accessioned2020-09-23T18:34:47Z
dc.date.available2020-09-23T18:34:47Z
dc.date.issued1995-03-01
dc.identifier.citationZhang, J., & Romo, J. T. (1995). Impacts of defoliation on tiller production and survival in northern wheatgrass. Journal of Range Management, 48(2), 115-120.
dc.identifier.issn0022-409X
dc.identifier.doi10.2307/4002796
dc.identifier.urihttp://hdl.handle.net/10150/644413
dc.description.abstractAlthough northern wheatgrass (Agropyron dasystachyum (Hook.) Scribn.) is a dominant or co-dominant species that decreases under grazing in northern Mixed Prairie, little is known about its response to herbage removal at different times during the growing season. The objective of this research was to determine the effects of defoliation on the tiller production and survival of this native perennial on a clayey range site in mixed prairie in south-central Saskatchewan. Vegetation was subjected to a factorial experiment with an initial defoliation in early-May, June, July, or August and repeated at 2- or 6-week intervals until mid-September in the same plots for 3 years. An undefoliated control was also included. On average defoliation enhanced tillering (71%) and survival relative to the control, and tiller recruitment was greatest during June and September 1989. Generally tiller survival decreased as the date of emergence in the growing season was delayed. Numbers of tillers emerging was positively correlated with soil water (r = 0.77). Some tillers of northern wheatgrass lived 5 years. The 2- and 6-week intervals of defoliation had little influence on tiller survival, but initiating defoliation near the time of tiller emergence reduced survival whereas delaying defoliation until August increased their survival. Increased tillering may be an adaptive feature enabling northern wheatgrass to tolerate defoliation by re-establishing lost photosynthetic area and maintaining or even increasing basal area. Thus, once released from grazing it may rapidly increase phytomass production in a relatively short time. Delaying grazing until August will maximize tiller survival of northern wheatgrass.
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.subjectElymus lanceolatus
dc.subjectfrequency
dc.subjectSaskatchewan
dc.subjectperennials
dc.subjectmortality
dc.subjecttillering
dc.subjectprairies
dc.subjectplant litter
dc.subjectdefoliation
dc.subjectsoil water
dc.titleImpacts of defoliation on tiller production and survival in northern wheatgrass
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.volume48
dc.source.issue2
dc.source.beginpage115-120
refterms.dateFOA2020-09-23T18:34:48Z


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