YIELD AND YIELD CONTRIBUTING PARAMETERS OF WHEAT AS AFFECTED BY IRRIGATION, SOWING DATE AND VARIETY

Abstract

The experiment was conducted through November 2012 to March 2013 in the Experimental Field of Sher-c-Bangla Agricultural University, Dhaka. Bangladesh to find out the effect of irrigation, sowing time and variety on different yield contributing parameters and yield of wheat. The experiment comprised three factors; Factor A: two irrigations, viz. 1: Irrigation; Jo: No irrigation (control). Factor B: three sowing times, viz. S: 18 November. S2: 03 December and 53: 19 December; and Factor C: four improved wheat varieties, viz. V = BAR! Gom-21 (Shatabdi), BAR! Gom-25. V 3 = BAR! Gom-26 and V 4 = BAR! Gom-27. The experiment was laid out in a Split-split plot design with three replications. Irrigation was assigned in the main plot, sowing time was in the sub plots and variety was in the sub-sub plots.. Experimental results indicated that the highest grain yields were obtained with I (2.915 t hi'), Si (2.983 t hi') and V, (2.636 t haj. The interaction treatment IS,V 1 showed significantly the highest yield (3.653 t hi') which was attributed to the maximum values in spikelets spike' (20.22), grains spik&' (66.78), and 1000 grain weight (47.23 g).