Study of Yield and Yield Components of Different Canola (Brassica napus L.) Varieties during Different Planting Dates in Urmiyeh

摘要

In order to study the effects of planting date on yield and yield components of canola (Brassica napus L.) a factorial experiment arranged in RCB design with three replications was carried out in 2012-13. The first factor, planting dates, were 6th ofSeptember, 7th of October and 6th of November. The second factor, cultivars, were Hyola308, Hyola330, Hyola60, Talayeh, Okapi and spring RGS). The studied traits were plant height, number of secondary branches, number ofsihques per plant, number of siliques per silique, 1000 kernel weight, grain yield, oil content and oil yield. The results of the analysis of variance showed that the effect of planting date on all traits except the number of secondary branches was significantly different (pd"0.01). thehighest grain yield (4785 kg/ha) resulted from the planting date of September 6th. The effects of cultivar were significantly different (pd"0.01) on all traits. The highest number of seeds per silique and siliques per plant resulted from the planting date of September 6th and the Talayeh cultivar (26 seeds and 95 siliques, respectively). The interaction of (planting date*cultivar) was significantly different (pd"0.01) on all traits except plant height and 1000 kernel weight.