EFFECT OF IRRIGATION AND VARIETIES ON THE GROWTH AND YIELD OF RAPESEED

Abstract

The study was curled out at the Slier-c- Bangla Agricultural University farm, Dhaka during ?'ovember 2006 to March 2007 to evaluate the effect of irrigation and variety on growth. yield attributes and yield of rapesced. The treatment comprised of three levels of irrigation viz, no irrigation, one irrigation at 20 DAS, one irrigation at 35 DAS, two irrigations at 20 and 35 DAS, and three irrigations at 20, 35 50 DAS, and three varieties viz. SAU Sarisha- I, Kalyania and Improved Tori-7. The experiment was laid out in it split plot design with three replications. Three irrigations (at 20, 35 and 50 DAS) increased economic yield with higher values of harvest index as the yield attributes like branches plant", siliqua plani', seeds siliqua" and 1000 seed weigh were higher The seed yield with three irrigations were 11I.93% and 10.73% higher than no irrigation and two irrigations, respectively.'The variety SAU Sarisha- 1 showed its superiority by producing 1.4 % and 45.94 % higher yield than Kalyania and Improved Tori-7, respectively. This variety (SAU Sarisha-L) also showed higher branches plant", seeds siliqua", 1000 seed weight, biological yield and harvest index. most of the eases interaction of three irrigations with SAU Sarisha- I performed best in respect of grain yield as well as other studied parameters. The highest seed yield (1827.0 kg ha") was found in the interaction of three irrigation with SAU Sarisha- I. This was achieved due to the maximum number of branches plant', seeds siliquae" and 1000 seed weight in this interaction. The yield attributes was also supported with appreciable production of dry matter.