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The Influence of Atrazine or Simazine on Forage Yield and Nitrogen Components of Corn

Published online by Cambridge University Press:  12 June 2017

Rodney J. Fink  and
O. Hale Fletchall
Rodney J. Fink
Affiliation:
Agriculture, Murray State University, Murray Kentucky Field Crops, Department of Field Crops, University of Missouri
O. Hale Fletchall
Affiliation:
Field Crops, University of Missouri, Columbia Missouri
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Abstract

Plots planted to corn (Zea mays L. var. Mo. 880) were treated with 0, 2.5, 5, and 10 lb/A of 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) or 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine) plus 0, 100, or 200 lb/A of nitrogen fertilizer. Yields of corn forage harvested 5 weeks after planting were significantly reduced by herbicidal treatments. Reductions were more pronounced on corn treated with simazine than with atrazine. In a given year, yields of corn forage from each successive harvest were reduced less, percentagewise, than the previous ones. Yields of corn grain generally were unaffected by herbicidal treatments, except when 10 lb/A of simazine were applied. Herbicides caused an increase in percent nitrate in forage approximately 5 weeks after treatment. Percent of nitrogen in corn forage rose sharply, approximately 5 weeks after planting, due to herbicidal treatments, especially on plots not treated with nitrogen fertilizer.

Type
Research Article
Information
Weeds , Volume 15 , Issue 3 , July 1967 , pp. 272 - 274
Copyright
Copyright © 1967 Weed Science Society of America 

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References

Literature Cited

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