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Paper Information

Title: 

INCREASING CORN COMPETITIVENESS AGAINST WEEDS USING NITROGEN AND ROW SPACING MANAGEMENT

Type: PAPER
Author(s): RASEKHI M.,MIRI H.R.,MOHAJERI F.
 
 
 
Name of Seminar: IRANIAN WEED SCIENCE CONGRESS
Type of Seminar:  CONGRESS
Sponsor:  ANKOMANE OLOME ALAFHAYE HARZE IRAN
Date:  2010Volume 3
 
 
Abstract: 

IN ORDER TO EVALUATE THE EFFECT OF ROW SPACING AND TIME OF NITROGEN APPLICATION ON CORN YIELD AND ITS COMPETITIVENESS AGAINST WEED, AN EXPERIMENT WAS CONDUCTED IN MARVDASHT, IRAN IN 2008. TREATMENT CONSISTED OF FOUR ROW SPACING (50, 60, 70 AND 80 CM) AND FOUR NITROGEN APPLICATION (N1: THE WHOLE FERTILIZER USED AT THE TIME OF PLANTING; N2: 2/3 OF THE FERTILIZER AT THE PLANTING AND THE REMAINING 1/3 AT THE 8-LEAF STAGE; N3: 1/3 AT THE PLANTING+AT THE 8-LEAF STAGE+1/3 BEFORE TUSSLING; N4: NO FERTILIZER AT PLANTING TIME+2/3 AT THE 8-LEAF STAGE+2/3 BEFORE TUSSLING). THE RESULTS SHOWED THAT ROW SPACING AND SPLIT APPLICATION OF NITROGEN SIGNIFICANT AFFECT WEED-CORN COMPETITION. THE HIGHEST GRAIN YIELD, NUMBER OF EARS/M2, BIOLOGICAL YIELD AND CORN CGR OBTAINED IN 60 CM ROW SPACING AND N2 TREATMENT, WHILE WEED DRY WEIGHT, WEED NUMBER/M2, WEED CGR AND RGR WAS LOWEST IN THIS TREATMENT. THE HIGHEST WEED DRY WEIGHT AND CGR OBSERVED IN 80 CM ROW SPACING AND N1 TREATMENT. CORN SEED/EAR WAS HIGHEST IN 70 CM AND N2. IN CONCLUSION THE RESULTS SHOWED THAT THE ROW SPACING OF 60 CM AND SPLIT APPLICATION OF N FERTILIZER CAN SIGNIFICANTLY INCREASE CORN COMPETITIVENESS AGAINST WEEDS.

 
Keyword(s): CORN, COMPETITIVENESS, WEED, IWM, ROW, YIELD
 
 
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