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dc.contributor.authorBohnert, D. W.
dc.contributor.authorSheley, R. L.
dc.contributor.authorFalck, S. J.
dc.contributor.authorNyman, A. A.
dc.date.accessioned2021-03-08T18:42:37Z
dc.date.available2021-03-08T18:42:37Z
dc.date.issued2014-03
dc.identifier.citationBohnert, D. W., Sheley, R. L., Falck, S. J., & Nyman, A. A. (2014). Knapweed hay as a nutritional supplement for beef cows fed low-quality forage. Rangeland Ecology & Management, 67(2), 219–223.
dc.identifier.issn0022-409x
dc.identifier.doi10.2111/REM-D-13-00091.1
dc.identifier.urihttp://hdl.handle.net/10150/657021
dc.description.abstractAdvancing our ability to use invasive plants for producing commodities is central to the agricultural industry. Our objective was to evaluate Russian knapweed (Acroptilon repens "L." DC.) as a winter feed supplement for ruminant livestock. In Experiment 1, we utilized three ruminally cannulated steers in a completely randomized design to compare the ruminal degradation characteristics of alfalfa and Russian knapweed. In the second experiment, Russian knapweed and alfalfa were compared as protein supplements using 48 midgestation, beef cows (530-±-5 kg) offered ad libitum hard fescue (Festuca brevipila Tracey) straw in an 84-d study. Treatments included an unsupplemented control and alfalfa or Russian knapweed provided on an iso-nitrogenous basis. In Experiment 1, the rate and effective degradability of neutral detergent fiber was greater for alfalfa compared with Russian knapweed (P-≤-0.02). Ruminal lag time for NDF (period before measurable disappearance began) was greater for knapweed (P-=-0.03). Soluble nitrogen, rate of N degradation, rumen degradable N, and effective degradability of N were all greater for alfalfa compared with Russian knapweed (P-<-0.01). In Experiment 2, supplementation increased (P-<-0.01) cow weight gain and BCS compared to the unsupplemented control with no difference between alfalfa and Russian knapweed (P-=-0.47). There was no difference (P-=-0.60) in the quantity of straw offered between the unsupplemented cows and supplemented groups, but alfalfa fed cows were offered approximately 11% more (P-=-0.03) than Russian knapweed-fed cows. Total DM offered to cows was greater (P-<-0.01) for supplemented compared with unsupplemented cows with no difference noted between alfalfa and Russian knapweed (P-=-0.79). Russian knapweed is comparable to alfalfa as a protein supplement for beef cows consuming low-quality forage. Using Russian knapweed as a nutritional supplement can help solve two major production problems; managing an invasive weed, and providing a feedstuff that reduces an impediment in livestock production systems. © 2014 The Society for Range Management.
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.subjectDigestible protein
dc.subjectInvasive weeds
dc.subjectLivestock feed
dc.subjectRussian knapweed
dc.titleKnapweed hay as a nutritional supplement for beef cows fed low-quality forage
dc.typeArticle
dc.typetext
dc.identifier.journalRangeland Ecology & Management
dc.description.collectioninformationThe 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.
dc.eprint.versionFinal published version
dc.source.journaltitleRangeland Ecology & Management
dc.source.volume67
dc.source.issue2
dc.source.beginpage219
dc.source.endpage223
refterms.dateFOA2021-03-08T18:42:37Z


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