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Paper Information

Title: 

EVALUATION OF WEED GROWTH PARAMETERS IN COMPETITIVE CONDITION WITH CORN

Type: PAPER
Author(s): HABIBI SAVADKOOHI MARJANEH,PIRDASHTI HEMMATOLLAH,AMINI IRAJ,ABBASIAN ARASTOU,KERAMATI SARA
 
 
 
Name of Seminar: IRANIAN WEED SCIENCE CONGRESS
Type of Seminar:  CONGRESS
Sponsor:  ANKOMANE OLOME ALAFHAYE HARZE IRAN
Date:  2010Volume 3
 
 
Abstract: 

IN ORDER TO EVALUATING WEED SPECIES GROWTH INDICES IN A COMPETITIVE CONDITION WITH CORN, AN EXPERIMENT WAS CONDUCTED AT RESEARCH STATION OF SARI AGRICULTURAL SCIENCES AND NATURAL RESOURCES UNIVERSITY DURING 2006. THE EXPERIMENT WAS CONSISTED OF 14 TREATMENTS WHICH LAID OUT IN A RANDOMIZED COMPLETE BLOCK DESIGN WITH 4 REPLICATIONS. THE TREATMENTS INCLUDED WEED FREE AND WEED INFESTED PERIOD TO 4TH LEAF (V4), 6TH LEAF (V6), 8TH LEAF (V8), 10TH LEAF (V10), 14TH LEAF (V14), TASSELING (T) AND HARVEST STAGE (FULL SEASON WEED INFESTED AND CONTROL WERE THE CHECKS). VELVETLEAF (ABUTILON THEOPHRASTI) WITH DENSITY AROUND 50 PERCENTAGE OF TOTAL WEED DENSITY DURING GROWING SEASON HAS RECOGNIZED AS DOMINANT WEED. RESULTS SHOWED HIGHEST PERCENTAGE OF RELATIVE PERCENT OF WEED LEAF AREA (90 %), WEED GROWTH RATE (WGR) (12.8GR.M2.DAY) AND HEIGHT (218 CM) RELATED TO VELVETLEAF IN WEED INFESTED PERIOD, AND THIS WEED HAD THE HIGHEST EFFECT IN DECREASING THE CORN YIELD AND GROWING OF THIS WEED TO THE LATER STAGES OF CROP DEVELOPMENT CAUSED UP TO 6 % DECREASING OF CORN HEIGHT COMPARED TO ITSELF. RESULTS REVEALED THAT PRESENCE OF VELVETLEAF COULD BE INHIBITING GROWTH PARAMETERS OF OTHER WEEDS IN CORN FIELD.

 
Keyword(s): WEEDS, VELVETLEAF, LEAF AREA, WEED GROWTH RATE (WGR), CORN
 
 
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