home    about    browse    search    latest    help 
Login | Create Account

Computer model for simulating the long-term dynamics of annual weeds: from seedlings to seeds

Rasmussen, Ilse A. and Holst, Niels (2003) Computer model for simulating the long-term dynamics of annual weeds: from seedlings to seeds. Aspects of Applied Biology (69), pp. 277-284.

[img] Source file
Limited to [Registered users only]

92Kb

Summary

We developed a simple model to predict seed production from seedling density and estimated its six parameters for Chenopodium album and Papaver rhoeas from literature data, supplemented with field data on P. rhoeas seed production in Denmark. Parameter values were specified by their expected ranges rather than just point estimates, which enabled us to determine the expected ranges of seed production at given seedling densities. The model will be incorporated into a larger model framework presented earlier for a more complete description of annual weed seedbank dynamics in a crop rotation. We found the seed production (y) of P. rhoeas to be larger than reported earlier from UK; the relation to weed biomass (x) per m2 was curvilinear, y=6015∙x0.8153 seeds per m2. While the model needs to be validated, parameters for the two selected species were readily estimated from available literature and more species can be easily added.


EPrint Type:Journal paper
Subjects: Crop husbandry > Weed management
Research affiliation: Denmark > DARCOF II (2000-2005) > IV.1 (EXUNIT) Experimental units for research in organic farming systems
Related Links:http://web.agrsci.dk/plb/nho/Fieldweeds.htm
Deposited By: Rasmussen, Researcher Ilse A.
ID Code:3434
Deposited On:28 Oct 2004
Last Modified:12 Apr 2010 07:29
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

Repository Staff Only: item control page