YIELD PERFORMANCE OF RAPESEED FOLLOWING THE APPLICATION OF GA3

Abstract

The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during the rabi season from November 2016 to February 2017 to investigate the yield performance of mustard following the application of GA 3 . The treatment consisted of two factors, application time of GA 3 viz. S 1 = vegetative stage and S 2 = flowering stage; and six different levels of GA 3 viz. G 0 = 0 ppm, G 20 = 20 ppm, G 40 =40 ppm, G 60 =60 ppm, G 80 =80 ppm, and G 100 =100 ppm. The experiment was laid out in Randomized Complete Block Design (factorial) with three replications. Results showed a significant variation among the treatments in respect of most of the parameters studied. The maximum length of silique (over 5 cm), number siliquae per plant (over 55), number of seeds per siliquae (over 31) and 1000 seed weight (over 3 g) were shown by 60-80 ppm GA 3 application of GA 3 . Accordingly, the maximum yield of seeds per hectare (0.69-0.90 t) was obtained from 60-80 ppm

application of GA 3 at both the stages. The lowest seed yield per hectare (0.44 tones) was obtained from the fields wherein no GA 3 was applied.