Different applications effect of Atonik growth regulator on growth and yield of cotton

Abstract

The pots study was conducted during summer season of 2005 at the Field of Agriculture College - Sulaimani University to compare the influence of different application durations of growth regulator (Atonik) on two varieties of cotton (Lachata & Gedera236) which sown in pots in factorial experiment using CRD design with three replications. The result indicated that Gedera236 was surpassed significantly on Lachata variety in plant height and leaf area, While Lachata was gave a less number of non opened bolls with significant differences and there was no significant differences among the two varieties for the remainder characters. Significant differences were observed for the different durations of growth regulator application. Atonik application treats (after one month of Germination, at 10% flowering and at boll set stage) were surpassed the control and seed embedded treat in Atonik for 24 hrs. in most studied characters. There was Significant interaction between varieties and Atonik application duration treats, Gedera236 at boll set stage was found to be superior in plant height, for the other characters (No. of fruit, branches, opened boll No., leaf area, chlorophyll percent, seed cotton yield and lint cotton, cotton yield and seed weight) Lachata has registered the highest mean value at boll set stage application. For ginning outturn the highest values was registered for Gedera236 during the application of Atonik at the beginning of flowering stage.

Keywords

• different
• applications
• effect
• atonik
• growth
• regulator
• yield
• cotton