تأثیر تاریخ کاشت بر برخی صفات زراعی 13 رقم کلزا در کرج

The effects of planting date on some Traits agronomic of rapeseed varieties, an experiment was conducted at research field of Seed & Plant Improvement Institute (SPII) in karaj. the experiment laied out in split plot factorial arranged in a RCBD with 4 replications. Tow sowing dates (Dec. 25th and Oct. 22 th) main plots and 13 varieties (Elite, Olpro, sinatra, sahara, modena, Geronimo, ARG-91004, Dexter, SLMO46, Okapi, Frederic, ORW20-3002, RG4504) subplots in a factorial arrangement were evaluated plant. Traits including the number of seed in the main pod, minor pod, plant pod, biological yield, percentage of oil seed and oil seed yield. results showed that by delaying the planting time, the biological yield, percentage of oil seed and oil seed yield were reduced. Concerning the other characters, the delay in planting time caused a significant decrease in all. Among rapeseed varieties, the Elite variety produced the highest oil seed yield (2459kg/ha). also the greater number of seed in a pod belonged to SLM046 variety. The highest percentage of oil seed in plant was observed in RG4504. the lighest Yield belonged to the first planting time and in Elite variety with a rate of 5271 Kg/ha.