EFFECT OF PLANTING DATES ON SEED AND OIL YIELD OF CANOLA (Brassica napus L.) CULTIVARS

Abstract

This study was achieved to investigate the effect of sowing date on seed and oil yield as well as yield components in winter canola cultivars in Isfahan province during 2011?2012 farming season. A split plot design in randomized complete block design with three replications was used. Four planting dates 15 October, 22 October, 29 October and 5 November were considered as main factor levels in the main plot. Also, ten canola cultivars were used as sub factor levels and were arranged randomly in the sub plots. Results showed that the effect of sowing date was significant for all traits. On the other hand, the cultivar effect was significant for all traits. The interaction between planting date and cultivars was significant on traits stem elongation, flowering, end of flowering and maturity. In conclusion, cultivar KR4 in the first planting date (15 October) had the highest seed (4167 Kg/ha) and oil yield (1995 Kg/ha). Whereas, for late planting date (22 October) Karaj3 is the superior cultivar. Overall, KR4 is the best cultivar especially for normal planting date in Isfahan province