The study of agronomic traits cultivars and lines of oilseed rape in sowing dates differernt

In order to obtain to suitabel of sowing date in varieties and new lines of oilseed rape an experiment was conducted with using split- plot design on randomized complete block with three replication in zahk Agricultural Research station of zabol during two cropping seasons (2013-2014 and 2014-2015). Four sowing date at 20 day intervals (1 Aban (23 Oct) , 20 Aban (11 Nov), 10 Azar (1Dec), 30 Azar (21 Dec) and 20 Daema (10Jan ) was main plot and Four spiring rapeseed varieties and lines ( Zabol 0, Zabol 10 b, , RGS003, Hyloa401) were carried sub main plot. Based on results simple varience of analysis indicated that in both year effect sowing date and varietes and intraction effect sowing date ΅Α varietes was significant on seed yield (p΅ά 1%). In results componed variance analysis indicated that effect year exception number of seed in silique, was significant on traits other. Effect sowing date and varietes was significant on all phenelogic traits , and yield components(number of seed in silique and seed 1000 wieght) . Intraction effect sowing date ΅Α varietes also exception number of seed in silique on other traits meatuerd had significant difference. In first and second years the highest seed yield with mean 3090 and 2425 kg/ha obtained in first sowing date,1 Aban (23 Oct). the lowest of seed yield with mean 749 and 251 kg/ha in five sowing date 20 Daema (10Jan ) was belonged in first and second years respectiviely. Seed yield 30 percent had increase than to secand year. Zabol 0 line with mean 1901 kg/ha in first year and Hyloa401Hybrid and Zabol 0 line with mean 1226 and 1209 kg/ha had the most seed yield. Based on the results of the reaction of cultivars in all sowing date seemes that sowing in the early october to mid-November with Zabol 0, Hyloa401 Hybrid and Zabol 10 b are recommend in condition sistan region