Modelling seedbank dynamics of volunteer oilseed rape (Brassica napus )

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Pekrun, C., Lane, P. W. and Lutman, P. J. W. 2005. Modelling seedbank dynamics of volunteer oilseed rape (Brassica napus ). Agricultural Systems. 84 (5), pp. 1-20.

AuthorsPekrun, C., Lane, P. W. and Lutman, P. J. W.

A simple mechanistic model is presented which describes population dynamics of volunteer oilseed rape within a field. The model calculates the number of volunteers appearing in each crop and the seedbank after each crop. The main input variables are harvesting losses when the crop is oilseed rape, crop rotation, soil cultivation, soil moisture content within the arable soil layer and the level of volunteer control in each crop in the rotation. Simulation studies suggest that there are a number of agronomic means of minimising volunteer oilseed rape populations effectively. The amount of harvesting losses, the time span between oilseed rape harvest and the first tillage operation post-harvest, the efficiency of controlling oilseed rape in other crops and rotation itself are key components of a programme for ensuring that volunteer oilseed rape populations are minimised.

Simulation runs showed that the proportion of volunteer plants within a crop of oilseed rape will be relatively high, even though the density of volunteers is low in other crops. This contamination of a rape crop could be a particular problem in the context of the cultivation of genetically modified rape.

The model would benefit from improved estimates of some parameters. More data are particularly necessary on the long-term development of a seedbank of oilseed rape and the relationship between the size of the seedbank and the number of volunteers in various crops.

Year of Publication2005
JournalAgricultural Systems
Journal citation84 (5), pp. 1-20
Digital Object Identifier (DOI)doi:10.1016/j.agsy.2004.06.007
Open accessPublished as non-open access
Funder project or code508
Parameterising the biology and population dynamics of weeds in arable crops to support more targeted weed management
Publisher's version
Copyright license
Publisher copyright
Output statusPublished
Publication dates
Online07 Aug 2004
Publication process dates
Accepted01 Jun 2004
PublisherElsevier Sci Ltd

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