EFFECT OF IRRIGATION AT POST HEADING STAGE UNDER VARYING SOWING TIMES ON GROWTH AND YIELD OF WHEAT

Abstract

The experiment was conducted during the period from November 2014 to March 2015 in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka to find out the effect of different irrigation under varying sowing times on growth and yield of wheat. The experiment comprised of two factors; Factors A: Irrigation (3 times): I 1 : Irrigation during heading stage; I 2 : Irrigation after 10 days of I 1 ii

and I 3 : Irrigation after 10 days of I 2 ; Factor B: Sowing time (4 dates at 10 days interval): S 1 : Sowing at 10 November, S 2 : Sowing at 20 November, S 3 : Sowing at 30 November and S 4 : 10 December. The experiment was laid out in Split Plot Design with three replications. Different times of irrigation were assigned in the main plot and sowing date was assigned in the sub-plot. Irrigation after 10 days of heading stage showed better performance in all yield contributing and yield parameters except grain weight spike -1 . Combined action of irrigation after 10 days of heading stage and sowing at 20 November (I 2 S 2 ) recorded the highest values in 1000 grain weight (60.30 g) and grain yield (4.06 t ha -1 ) which however was not significantly different with those of I 1 and I 3 S 3