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Fertilizer Placement Affects Jointed Goatgrass (Aegilops cylindrica) Competition In Winter Wheat (Triticum aestivum)

Published online by Cambridge University Press:  12 June 2017

Abdel O. Mesbah  and
Stephen D. Miller
Abdel O. Mesbah
Affiliation:
Department of Plant Science, P.O. Box 3354, University of Wyoming, Laramie, WY 82071
Stephen D. Miller*
Affiliation:
Department of Plant Science, P.O. Box 3354, University of Wyoming, Laramie, WY 82071
*
Corresponding author's E-mail: [email protected].
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Abstract

A 3-yr study was conducted in eastern Wyoming from 1995 to 1997 to evaluate the effect of fertilizer placement on jointed goatgrass competitiveness with winter wheat. Fertilizer placement methods consisted of applying 45 kg/ha of nitrogen (50% as urea and 50% as ammonium nitrate) in a deep band 5 cm below and 2.5 cm to the side of the wheat row, broadcasting on the soil surface, or injecting fertilizer by spoke wheel 10 cm deep and 5 cm to the side of the wheat row. Neither fertilizer placement nor jointed goatgrass presence affected winter wheat stand. Wheat yield reductions from jointed goatgrass competition were 7 and 10% higher with the broadcast than deep-band or spoke-wheel injection methods, respectively. Wheat spikes/plant, seeds/spike, 200-seed weight, and plant height were not influenced by fertilizer placement; however, the presence of 35 jointed goatgrass plants/m2 reduced spikes/plant 21%, seeds/spike 12%, and 200-seed weight 6%. Jointed goatgrass populations were not influenced by fertilizer placement method; however, the number of spikes/plant was reduced 8 and 10%, joints/spike 3%, and biomass 15 and 21% by deep band or spoke wheel fertilizer placement.

Keywords

Goatgrass, Aegilops cylindrica Host. #AGECYwinter wheat, Triticum aestivum L.Cultural controlweed managementdeep bandspoke wheelbroadcastAGECY
Type
Research
Information
Weed Technology , Volume 13 , Issue 2 , June 1999 , pp. 374 - 377
Copyright
Copyright © 1999 by the Weed Science Society of America 

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Footnotes

1

Published with the approval of the Wyoming Agricultural Experiment Station as JA 1976.

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