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Effects of renewal time, taproot cutting, ploughing practice, false seedbed and companion crop on docks (Rumex spp.) when renewing grassland

Ringselle, Björn; Berge, Therese W.; Stout, Daniel; Breland, Tor Arvid; Hatcher, Paul E.; Haugland, Espen; Koesling, Matthias; Mangerud, Kjell; Lunnan, Tor and Brandsæter, Lars Olav (2019) Effects of renewal time, taproot cutting, ploughing practice, false seedbed and companion crop on docks (Rumex spp.) when renewing grassland. European Journal of Agronomy, 103, pp. 54-62.

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Online at: https://linkinghub.elsevier.com/retrieve/pii/S1161030118303435

Summary

Docks (Rumex spp.) are a considerable problem in grassland production worldwide. We investigated how different cultural management techniques affected dock populations during grassland renewal: (I) renewal time, (II) companion crop, (III) false seedbed, (IV) taproot cutting (V), plough skimmer and (VI) ploughing depth. Three factorial split-split plot experiments were carried out in Norway in 2007–2008 (three locations), 2008–2009 (one location) and 2009 (one location). After grassland renewal, more dock plants emerged from seeds than from roots. Summer renewal resulted in more dock seed and root plants than spring renewal. Adding a spring barley companion crop to the grassland crop often reduced dock density and biomass. A false seedbed resulted in 71% fewer dock seed plants following summer renewal, but tended to increase the number of dock plants after spring renewal. In some instances, taproot cutting resulted in less dock biomass, but the effect was weak and inconsistent, and if ploughing was shallow (16 cm) or omitted, it instead increased dock root plant emergence. Fewer root plants emerged after deep ploughing (24 cm) compared to shallow ploughing, and a plough skimmer tended to reduce the number further. We conclude that a competitive companion crop can assist in controlling both dock seed and root plants, but it is more important that the renewal time is favourable to the main crop. Taproot cutting in conjunction with ploughing is not an effective way to reduce dock root plants, but ploughing is more effective if it is deep and a skimmer is used.


EPrint Type:Journal paper
Keywords:Cover crop, Plow skimmer, Plowing depth, Rumex longifolius, Rumex obtusifolius, Rumex crispus
Subjects: Crop husbandry > Weed management
Research affiliation: Norway > NMBU - Norwegian University of Life Sciences
Norway > NIBIO – Norwegian Institute of Bioeconomy Research
UK > Univ. of Reading
ISSN:1161-0301
DOI:10.1016/j.eja.2018.11.005
Deposited By: Koesling, Matthias
ID Code:34271
Deposited On:21 Dec 2018 07:33
Last Modified:21 Dec 2018 07:33
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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