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Information Journal Paper

Title

THE EFFECT OF GROWTH INDICES IN COMPETITIVE ABILITY OF SOME CANOLA (BRASICA NAPUS) CULTIVARS AGAINST WILD MUSTARD (SINAPIS ARVENSIS)

Pages

  97-121

Abstract

 In order to evaluate the interference of WILD MUSTARD on GROWTH INDICES of CANOLA cultivars an experiment was carried out in Agricultural and Natural Resources Research Institute of Gorgan during growing season of 2005-2006. The experiment was established as a randomized completely block design in a factorial arrangement of treatments with three replications. CANOLA cultivars, Zarfam, Sarigol, Talayh, R. G. S 003, Option 500, Hayola 401 and Hayola 330 were kept under weed free and weed infested conditions. Based on analysis results, WILD MUSTARD resulted in reduction of CANOLA dry matter, leaf area index, leaf area index duration and crop growth rate, significantly. The maximum dry matter, leaf area index and crop growth rate in control tretment (weed free treatment) belonged to Hayola330 cultivar. The maximum and minimum reduction rate of dry matter and leaf area index of CANOLA cultivars belonged to control Option500 and Zarfam cultivars respectively. Results revealed that cultivars with higher Leaf area index, relative leaf area expansion rate and better vertical leaf area distribution will be more competitive in weed-infested conditions, and can be used in breeding programs to enhance competitive ability of CANOLA cultivars.

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