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Simulation Analysis of Weed Population Dynamics in Ridge-Tilled fields

Published online by Cambridge University Press:  12 June 2017

Nicholas Jordan
Nicholas Jordan*
Affiliation:
Div. of Sci., Northeast Missouri State Univ., Kirksville, MO 63501
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Abstract

Effects of nonchemical weed control on weed and seedbank demography in ridge-tilled fields were simulated to examine long-term effects on weed population dynamics. Ridge tillage entails active seedbank management, including removal of much of the seedbank from the crop growth zone (ridge) to the interridge zone (furrow) at planting, and other seedbank manipulations. Dynamics of simulated yellow foxtail and velvetleaf populations were sharply sensitive to the rate of seed removal from the ridge. Variation in winter seed survival, ridge plant demography (emergence, survival, and seed production), and seed survival in the furrow after removal from the ridge also had strong effects on simulated dynamics. To prevent rapid population growth in a simulated corn-soybean rotation, very effective control of seedlings emerging with each crop was necessary to offset seed production from seedlings emerging after ridge rebuilding in corn years. Dynamics of both species were highly sensitive to cultivation efficiency. Effective “rescue” weed control must be available to prevent sharp increases in weed seedbanks during years when cultivation is ineffective.

Keywords

Yellow foxtail, Setaria lutescens (L.) Beauv. #3 SETLUvelvetleaf, Abutilon theophrasti Medik # ABUTHWeed demographyseedbank dynamicsconservation tillagenonchemical weed controlpopulation modelingpersistent seedbank speciestransient seedbank speciesAbutilon theophrasti ABUTHSetaria lutescens SETLU
Type
Special Topics
Information
Weed Science , Volume 41 , Issue 3 , September 1993 , pp. 468 - 474
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

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