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Growth Analysis of Weed and Crop Species with Reference to Seed Weight

Published online by Cambridge University Press:  12 June 2017

Andrew C. Seibert  and
R. Brent Pearce
Andrew C. Seibert
Affiliation:
Dep. Agron., Iowa State Univ., Ames, IA 50011
R. Brent Pearce
Affiliation:
Dep. Agron., Iowa State Univ., Ames, IA 50011
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Abstract

Growth and morphological characteristics of four weed and two crop species were analyzed to determine how small-seeded weeds can compete with large-seeded crops despite the initial size disadvantage. Small-seeded weeds had higher relative growth rates because of increased percentages of biomass devoted to leaves. This morphological scheme was achieved primarily through a reduction in the percentage of biomass devoted to roots. Yet, small-seeded weeds were able to develop larger mean plant root lengths as a result of having both roots of smaller diameter and higher rates of root length increase.

Keywords

Leaf area ratioleaf weight rationet assimilation raterelative growth rateroot developmentroot growthroot weight ratioGlycine maxHelianthus annuusAbutilon theophrastiAmaranthus retroflexusChenopodium albumXanthium strumariumABUTHAMARECHEALXANST
Type
Weed Biology and Ecology
Information
Weed Science , Volume 41 , Issue 1 , March 1993 , pp. 52 - 56
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

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