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Cirsium arvense responses to stubble cultivation and catch crops in organic cropping systems

Holst, Niels; Melander, Bo; Rasmussen, Ilse A. and Hansen, Preben Klarskov (2012) Cirsium arvense responses to stubble cultivation and catch crops in organic cropping systems. Working paper. [Completed]

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Field studies on perennial weeds, such as Cirsium arvense, are necessary to study the systemic effects of weed control. In this study we analyse the responses in above-ground C. arvense biomass and crop yield from results obtained in two organic field experiments, both combining stubble cultivation with post-harvest catch crops. A range of catch crops was investigated, varying in both species mixture and method of establishment, yet stubble cultivation was the only treatment found to reduce C. arvense density. The effect was even seen only in one year when a harsh winter acted synergistically with soil tillage. C. arvense exhibited density-dependent growth, in terms of above-ground biomass at harvest, with an estimated max. exponential growth rate of 0.975±0.1442 y–1 and an equilibrium density of 156±15.89 g m–2, disregarding the effect of harsh winters. We conclude that this logistic growth pattern is important to include in statistical analyses of treatment effects and furthermore suggest additional investigations on the use of catch crops for perennial weed control.

EPrint Type:Working paper
Keywords:Cultural control, mechanical control, growth, density dependence
Subjects: Crop husbandry > Weed management
Research affiliation: Denmark > DARCOF III (2005-2010) > WEEDS - Control of weeds in organic cropping
Denmark > Organic RDD 1 > HighCrop
Denmark > CROPSYS
Deposited By: Holst, Dr. Niels
ID Code:20590
Deposited On:26 Mar 2012 08:26
Last Modified:06 Jun 2022 16:03
Document Language:English
Refereed:Not peer-reviewed

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