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Phenology of common lambsquarters growth parameters

Published online by Cambridge University Press:  20 January 2017

Jed Colquhoun ,
David E. Stoltenberg ,
Larry K. Binning  and
Chris M. Boerboom
David E. Stoltenberg
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
Larry K. Binning
Affiliation:
Department of Horticulture, University of Wisconsin, Madison, WI 53706
Chris M. Boerboom
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
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Abstract

Research was conducted to characterize the phenology of common lambsquarters growth parameters as influenced by climatic variation among years. Treatments included soybean or corn grown alone, common lambsquarters with soybean or corn, and common lambsquarters grown alone. Common lambsquarters leaf area and plant height phenology differed among years and was variable within treatments. Conversely, crop leaf area and plant height phenology did not differ among years and was less variable within a treatment than common lambsquarters. Weed relative leaf area and relative volume differed among years because of differences in crop and common lambsquarters leaf area and plant height phenology. Differences in common lambsquarters relative leaf area and relative volume among years may explain differences in previously reported crop yield responses to weed infestations between sites and years. Although common lambsquarters relative leaf area and relative volume differed among years, variability as indicated by regression coefficients of determination was also high within year and treatment. Crop leaf area and plant height phenology were well described by regression equations, with r 2 values greater than 0.68. Therefore, low coefficients of determination for relative leaf area and relative volume models were attributed to variability in common lambsquarters within a treatment.

Keywords

Common lambsquarters, Chenopodium album L. CHEALfield corn, ‘Dekalb DK493SR’, Zea mays L.soybean, ‘Asgrow XP19505RR’ and ‘AG2101RR’, Glycine max L. MerrWeed biologyweed ecologyCHEAL
Type
Weed Biology and Ecology
Information
Weed Science , Volume 49 , Issue 2 , April 2001 , pp. 177 - 183
Copyright
Copyright © Weed Science Society of America 

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