GROWTH AND YIELD OF TWO RAPESEED VARIETIES AS AFFECTED BY POPULATION DENSITY

Abstract

An experiment was conducted at the field of Sher-e-Bangla Agricultural University farm. Dhaka in Itabi season during November 2006 to March 2007 to evaluate the growth and yield of two rapeseed varieties as affected by population density. The treatment of the experiment consisted of two varieties viz. BAR! sarisha-13 and SAU sarisha-1 and six population density viz. 30. 40 50 60 70 and 80 plants m 2 . Die experiment was laid out in a randomized complete block design (thetorial) with three replications. The higher seed yield was obtained from SAU sarisha-1 (1799.77 kg ha-') which was 8.17% higher than BARI sarisha-13. The higher seed yield of SAU sarisha-1 this was mainly attributed to number of branches plant -! and number of siliquae plant* Among the population densities. the lowest population density of 30 plants ui 2 had maximum number of branches plant number of siliquac plant length of siliqua. number of seeds per siliqua. 1000-seeds weight and seed yield plant except plant height. The seed yield hectare' was the highest with population density of' 60 plants 111 2 which was 28.07%. 19.97%. 17.74%. 10.25% and 6.47% higher than 30. 40, 50. 70 and 80 plants rn'2 respectively. The interaction effect of variety and population density was also significant showing the highest seed yield plant from the combined efket of SALJ sarisha-1 and population density of 30 plants ni 2 This was achieved due to maximum number of branches plant and number of' siliquac plant '.The

maximum seed yield per hectare was obtained by using SALJ sarisha-1 and 60 plants m' 2.This

was

due to the Ilict that 60 plants rn'7 was the optimum plant population n12 which assested in obtaining higher yield than other plant densities. All of the yield attributes were highly significant. The relationship between the yields attributes and yield was highly significant.