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Atrazine Uptake by Sudangrass, Sorghum, and Corn

Published online by Cambridge University Press:  12 June 2017

F. W. Roeth  and
T. L. Lavy
F. W. Roeth
Affiliation:
Formerly University of Nebraska; now Department of Botany and Plant Pathology, Purdue University, Lafayette, Indiana
T. L. Lavy
Affiliation:
Department of Agronomy, University of Nebraska, Lincoln, Nebraska
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Abstract

The uptake of 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine) was studied in sudangrass [Sorghum sudanense (Piper) Stapf, var. Piper], grain sorghum [Sorghum bicolor (L.) Moench], and corn (Zea mays L.) to find whether differences in atrazine uptake exist among these species. The uptake of atrazine followed closely the growth patterns of corn, sorghum, and sudangrass during the first 5 weeks of growth. Concentration of 14C from ring-labeled 14C-atrazine in the soil reached a peak in corn, sorghum, and sudangrass plants after 2 weeks of growth and then declined. The 14C concentrations were two to three times greater in sorghum and sudangrass than in corn throughout the 5-week period. Atrazine uptake per gram of plant growth by these crops was directly proportional to the concentration of atrazine in the soil and the proportionality factors were in the order: sudangrass < sorghum ≫ corn. Total uptake and the total growth were in order: corn ≫ sorghum = sudangrass. In a study where relative humidity was a variable, the amount of atrazine absorbed per ml of water was inversely related to total water usage.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 1 , January 1971 , pp. 93 - 97
Copyright
Copyright © Weed Science Society of America 

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References

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