Paper Information

Title: 

MORPHOLOGICAL TRAITS, YIELD AND HARVEST INDEX OF THREE RAPE SEED (BRASSICA NAPUS L.) CULTIVARS AT INTERFERENCE WITH WINTER WEEDS

Type: PAPER
Author(s): MIRSHEKARI BAHRAM,KHORSHIDI BENAM MOHAMMAD BAGHER,JAVANSHIR AZIZ
 
 
 
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 EFFECTS OF WEEDS (SINAPIS ARVENSIS, HORDEUM SPP., SECALE MONTANUM AND AGROSTEMMA GITHAGO) COMPETITION ON THREE WINTER RAPESEED (BRASSICA NAPUS L.) CULTIVARS AN EXPERIMENT WAS CONDUCTED IN ISLAMIC AZAD UNIVERSITY OF TABRIZ, IRAN. STUDIED FACTORS WERE TIME OF WEED CONTROL INCLUDED WEEDING IN ROSETTE, EARLY STEM ELONGATION, EARLY FLOWERING AND 50% FLOWERING STAGES, FULL SEASON COMPETITION AND CONTROL; AND SLM046, OPERA AND OKAPI CULTIVARS. RESULTS SHOWED THAT BIOLOGICAL YIELD OF RAPESEED IN WHOLE SEASON WEED-INFESTED PLOTS REDUCED 40%, AS COMPARED WITH CONTROL. WEEDS COULD INCREASE BIOMASS UP TO 410 G M-2 WHEN GREW WITH RAPESEED ALONG THE SEASON. WEEDS CONTROL AT EARLY STEM ELONGATION, EARLY FLOWERING AND 50% FLOWERING STAGES WITH 32%, 44% AND 50% REDUCTION VALUE IN SEED YIELD, RESPECTIVELY, HAD SIGNIFICANT DIFFERENCE WITH WEED-FREE PLOTS. WHEN THE WEEDS COMPETITION PERIOD TOOK A LONG TIME, ALLOCATION OF BIOMASS TO SEEDS DECREASED. REDUCTION VALUE IN OIL YIELD OF RAPESEED IN DIFFERENT LEVELS OF WEED CONTROL WERE 32%, 4%, 45%, 50% AND 55%, RESPECTIVELY. ONE TIME WEEDS CONTROL IN EARLY STEM ELONGATION OF ALL RAPESEED CULTIVARS WAS RECOMMENDED.

 
Keyword(s): BIOMASS, FULL SEASON INTERFERENCE, HARVEST INDEX, MORPHOLOGICAL TRAITS, RAPESEED, WEEDS
 
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