Paper Information

Title: 

EFFECT OF WATER DEFICIT STRESS AND NITROGEN APPLICATION RATE ON CORN-REDROOT PIGWEED COMPETITION USING REPLACEMENT SERIES EXPERIMENTS

Type: PAPER
Author(s): IZADI E.,RASHED MOHASSEL M.H.
 
 
 
Name of Seminar: IRANIAN WEED SCIENCE CONGRESS
Type of Seminar:  CONGRESS
Sponsor:  ANKOMANE OLOME ALAFHAYE HARZE IRAN
Date:  2010Volume 3
 
 
Abstract: 

IN ORDER TO STUDY THE EFFECT OF WATER DEFICIT STRESS AND NITROGEN APPLICATION RATE ON CORN-REDROOT PIGWEED INTERACTION, A FACTORIAL EXPERIMENT BASED ON RANDOMIZED COMPLETE BLOCK DESIGN WAS CONDUCTED IN GREENHOUSE CONDITIONS USING REPLACEMENT SERIES METHOD. DIFFERENT MIXING RATIOS OF PIGWEED, MAIZE INCLUDING 0: 100, 25: 75, 50: 50, 75: 25 AND 100: 0 WERE STUDIED. TO CORN TEASELING STAGE. TREATMENTS INCLUDED SOIL WATER AVAILABILITY (25 AND 50 FC) AND NITROGEN APPLICATION RATES (0, 200 AND 400 KG PER HECTARE). RESULTS SHOWED THAT BOTH CORN AND PIGWEED DRY MATER INCREASED SIGNIFICANTLY (P<0.05) WITH INCREASING NITROGEN APPLICATION RATE IN NORMAL SOIL WATER CONDITION. IT ALSO ENHANCED CORN COMPETITIVE ABILITY WITH PIGWEED. BUT DROUGHT STRESS DECREASED BOTH PLANTS DRY MATER PRODUCTION. IT ALSO HAD NOT ANY ADVANTAGE FOR CORN YIELD.

 
Keyword(s): CORN, REDROOT PIGWEED, NITROGEN AND DROUGHT STRESS
 
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