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Effects of shading on the growth of nutsedges (Cyperus spp.)

Published online by Cambridge University Press:  12 June 2017

Bielinski M. Santos ,
Jose P. Morales-Payan ,
William M. Stall ,
Thomas A. Bewick  and
Donn G. Shilling
Jose P. Morales-Payan
Affiliation:
Horticulture Science Department, University of Florida, Gainesville, FL 32611-0690
William M. Stall
Affiliation:
Horticulture Science Department, University of Florida, Gainesville, FL 32611-0690
Thomas A. Bewick
Affiliation:
Horticulture Science Department, University of Florida, Gainesville, FL 32611-0690
Donn G. Shilling
Affiliation:
Agronomy Department, University of Florida, Gainesville, FL 32611-0690
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Abstract

Greenhouse studies were carried out to determine the effects of different shading levels on biomass accumulation of purple and yellow nutsedge. Artificial shading levels provided were 20, 40, 60, and 80% of incident sunlight in addition to the full sunlight control (0% shading). Yellow nutsedge shoot and tuber number, plant height, and shoot and tuber dry weight were less affected by 20% shading than were these variables for purple nutsedge. Shoot and tuber dry biomass for both species responded linearly to shading level. In yellow nutsedge, 80% shading reduced dry matter partitioning to the tubers and increased partitioning into the shoots. In contrast, biomass partitioning to purple nutsedge tubers was decreased under high shade conditions without increases in partitioning to the shoots. The light compensation point was lower for yellow nutsedge than for purple nutsedge. This could possibly explain the wide distribution of yellow nutsedge in relatively low light intensity environments, in contrast with purple nutsedge, which generally occurs in tropical areas where higher light intensities are the norm.

Keywords

Yellow nutsedge, Cyperus esculentus L., CYPESpurple nutsedge, Cyperus rotundus L., CYPROShadinglight reductionlight compensation point
Type
Weed Biology and Ecology
Information
Weed Science , Volume 45 , Issue 5 , October 1997 , pp. 670 - 673
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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