The effect of planting data and seed rate effects on yield and components yield in new canola varieties in Sistan.

In order to obtain the best of sowing date and seed rate , a split- factorial experiment with a randomized complete block design with three replication was condncted with using split- factorial design on randomized complete block with three replication in zahk Agricultural Research station of zabol during two cropping seasons( 2004-2005 and 2005-2006). main plot was sowing date in Four level from 15/7/2004 at 15 day interrals include (15/7)0/7,15/8 and 30/8) and sub plot formed from factorial combination of two spiring rapeseed varieties ( Hyloa401 and RGS003) with three seed rate ( 6,8 and 10 kg/ha) . The studied traits were: height,number of silique in plant, number seed in silique, weight 1000 grain, grain Yield, oil percent , oli yield, number plant in spuer( m2), during flowering period and during vegetative period. The results variance analysis indicated that sowin date had significant differences in the seed yield and yield components (number of silique in plant, number seed in silique, weight 1000 grain ) and other the studied traits. With dealed in sowing date seed yield was decreased. The highest seed yield with mean 3943 and 3830kg/ha)in sowingdate second and firsth and lowest of seed yield with mean 1830kglha in sowing date fourth ( 30/8/ novamr) was obtaind . The effect varieties except number seed in siIique, height and oil percent on the other components and traits had not significant differences. In within cultivars , RGS003 With mean 3249 kg/ha in comparsion with Hyola 401 with mean 3062 hglha was the best. The effect seed rate except weight 1000 grain, , height , during vegetative period ,biological yield and, number -plant in squer( m2)on the other components and traits had not significant differences.Nevertheless not significant difference between the seed rates the highest seed yield with mean 3282 kglha at seed rate high obtaind. Second and thired intraction effects study of factors except number of silique in plant, weight 1000 grain, height and during flowering period on the other components and traits had not significant differences. Our results the best of sowing date (30/7 october) , the best of seed ratelOkglha and the best of cultivars Hyloa401 and RGS003 were recomendation for condition of sistan area.