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dc.contributor.authorRingselle, Björn
dc.contributor.authorBertholtz, Erik
dc.contributor.authorMagnuski, Ewa
dc.contributor.authorBrandsæter, Lars Olav
dc.contributor.authorMangerud, Kjell
dc.contributor.authorBergkvist, Göran
dc.identifier.citationFrontiers in Plant Science. 2018, 8 .nb_NO
dc.description.abstractTillage controls perennial weeds, such as Elymus repens, partly because it fragments their underground storage organs. However, tillage is difficult to combine with a growing crop, which limits its application. The aim of this study was to evaluate how soil vertical cutting with minimum soil disturbance and mowing affect the growth and competitive ability of E. repens in a grass–clover crop. A tractor-drawn prototype with vertical disks was used to fragment E. repens rhizomes with minimal soil and crop disturbance. In experiments performed in 2014 and 2015 at a field site close to Uppsala, Sweden, the rhizomes were fragmented before crop sowing (ERF), during crop growth (LRF), or both (ERFCLRF). Fragmentation was combined with repeated mowing (yes/no) and four companion crop treatments (none, Italian ryegrass, white clover, and grass/clover mixture). The results showed that in the grass–clover crop, rhizome fragmentation reduced E. repens rhizome biomass production and increased Italian ryegrass shoot biomass. ERF and LRF both reduced E. repens rhizome biomass by about 38% compared with the control, while ERFCLRF reduced it by 63%. Italian ryegrass shoot biomass was increased by 78% by ERF, 170% by LRF and 200% by ERFCLRF. Repeated mowing throughout the experiment reduced E. repens rhizome biomass by about 75%. Combining repeated mowing with rhizome fragmentation did not significantly increase the control effect compared to mowing alone. We concluded that rhizome fragmentation using vertical disks can be used both before sowing and during crop growth to enhance the controlling effect of grass–clover crops on E. repens.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.titleRhizome Fragmentation by Vertical Disks Reduces Elymus repens Growth and Benefits Italian Ryegrass-White Clover Cropsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalFrontiers in Plant Sciencenb_NO
dc.relation.projectNorges forskningsråd: 255176nb_NO
dc.relation.projectNorges forskningsråd: 256441nb_NO
cristin.unitnameInstitutt for plantevitenskap

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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