Effect of Rhizome Fragmentation, Clover Competition, Shoot-Cutting Frequency, and Cutting Height on Quackgrass (Elymus repens)

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Kolberg, D.NMBU, Norway; NIBIO, Norway (författare)

Effect of Rhizome Fragmentation, Clover Competition, Shoot-Cutting Frequency, and Cutting Height on Quackgrass (Elymus repens)

Artikel/kapitelEngelska2018

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2017-10-17
Cambridge University Press,2018
printrdacarrier

Nummerbeteckningar

LIBRIS-ID:oai:DiVA.org:ri-60097
https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-60097URI
https://doi.org/10.1017/wsc.2017.65DOI
https://res.slu.se/id/publ/94738URI

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Språk:engelska
Sammanfattning på:engelska

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Ämneskategori:ref swepub-contenttype
Ämneskategori:art swepub-publicationtype

Anmärkningar

Quackgrass is a problematic agricultural weed in the temperate zones of the world and is difficult to control without herbicides or intensive tillage. However, it may be possible to control quackgrass with less environmental impact by combining multiple low-intensity control methods. A pot experiment was conducted in July to October 2012 and repeated in June to September 2013 to investigate the effect of rhizome fragmentation, competition from white clover, shoot-cutting frequency, and cutting height on quackgrass. Rhizome fragmentation was expected to result in more, but weaker, quackgrass shoots that would be more vulnerable to shoot cutting and competition. However, by 20 d past planting, rhizome fragmentation did not change the total number of quackgrass shoots per pot, because an increase in main shoots was offset by a decrease in tiller numbers. Rhizome fragmentation did not reduce quackgrass biomass acquisition during the experimental period. Although rhizome fragmentation did reduce total fructan content, it did not enhance the effect of clover competition, shoot-cutting frequency, or shoot-cutting height. Clover competition by itself reduced quackgrass shoot numbers by 72%, rhizome biomass by 81%, and belowground fructan concentration by 10 percentage points, compared with no competition. The more frequently quackgrass shoots were cut, the less biomass quackgrass acquired, and a high shoot-cutting frequency (each time quackgrass reached 2 leaves) resulted in a lower belowground fructan concentration than a low shoot-cutting frequency (at 8 leaves). However, in pots without competition, a higher shoot-cutting frequency resulted in more quackgrass shoots. A lower shoot-cutting height (25 mm) had more impact when shoot cutting was more frequent. In conclusion, rhizome fragmentation did not reduce the number of quackgrass shoots or rhizome biomass, but competition from white clover, a high shoot-cutting frequency, and a low shoot-cutting height strongly suppressed quackgrass biomass and fructan acquisition.

Ämnesord och genrebeteckningar

LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Jordbruksvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Agricultural Science hsv//eng
Couch grass
defoliation
Elytrigia repens
fructan
mowing
perennial grass
regrowth capacity
reserve storage
biomass allocation
competition (ecology)
cutting (process)
fragmentation
frequency analysis
grass
height
legume
monosaccharide
perennial plant
regrowth
rhizome
shoot
weed
weed control
Elymus repens
Trifolium
Trifolium repens

Biuppslag (personer, institutioner, konferenser, titlar ...)

Brandsæter, L. O.NMBU, Norway; NIBIO, Norway (författare)
Bergkvist, GöranSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)50573 (författare)
Solhaug, K. A.NMBU, Norway (författare)
Melander, B.Aarhus University, Denmark (författare)
Ringselle, BjörnSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)47831 (författare)
NMBU, Norway; NIBIO, NorwayInstitutionen för växtproduktionsekologi (creator_code:org_t)
Sveriges lantbruksuniversitet

Sammanhörande titlar

Ingår i:Weed science: Cambridge University Press66:2, s. 215-2250043-17451550-2759

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Av författaren/redakt...: Kolberg, D.; Brandsæter, L. O ...; Bergkvist, Göran; Solhaug, K. A.; Melander, B.; Ringselle, Björn

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