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Effect of Nitrogen Rates and Weed Control Treatments on Maize Yield and Associated Weeds in Sandy Soils

Published online by Cambridge University Press:  20 January 2017

Hussein F. Abouziena ,
M. F. El-Karmany ,
Megh Singh  and
S. D. Sharma
Hussein F. Abouziena*
Affiliation:
Botany Department, National Research Center, Dokki, Giza, Egypt 12622
M. F. El-Karmany
Affiliation:
Agronomy Department, National Research Center, Dokki, Giza, Egypt 12622
Megh Singh
Affiliation:
University of Florida, IFAS, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL 33850
S. D. Sharma
Affiliation:
University of Florida, IFAS, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL 33850
*
Corresponding author's E-mail: abouzainah@yahoo.com
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Abstract

The effect of N levels, weed control treatments, and their interaction on maize yield and weed growth in sandy soils is not completely understood. Therefore, field experiments were conducted during 2005 and 2006 to determine if management can improve maize competitiveness with weeds, and thus achieve the yield potential of maize in sandy soils. The experiment included three N levels (300, 338, and 375 kg/ha) and five weed control treatments, e.g., hand hoeing twice, hand hoeing three times, fluroxypr + hoeing once, hoeing once + bispyribac-Na, and a nonweeded check. N rates affected dry weight of weeds growing with maize except with large crabgrass. Biomass of common purslane, considered a nitrophilous species, was increased by all N levels. Weeds were controlled by all treatments compared with the nontreated check; however, herbicide treatments were not superior to hand-hoeing treatments. Using more N favored growth and yield of maize more than weeds. Adding N fertilizer also improved most yield parameters. Highest grain yield of maize resulted at 375 kg/ha N. All weed control treatments improved grain yield two- to threefold compared with the nonweeded check. The interaction between N rates and weed control treatments had significant effects on dry biomass of common purslane and barnyardgrass, as well as grain index and biological yield parameters of maize. Grain yields were improved with fluroxypyr applied 2 wk after sowing (WAS) maize followed by one hand hoeing 6 WAS or hoeing at 3 WAS followed by bispyribac-Na applied 6 WAS. However, highest yields were obtained by hoeing early during the growing season.

Keywords

Maize, Zea mays L.fluroxypyrbispyribac-Nacommon purslane, Portulaca oleracea L.barnyardgrass, Echinochloa crus-galli (L.) Beauvlarge crabgrass, Digitaria sanguinalis (L.) ScopHand hoeingintegrated weed managementN management
Type
Research
Information
Weed Technology , Volume 21 , Issue 4 , December 2007 , pp. 1049 - 1053
Copyright
Copyright © Weed Science Society of America 

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