Effect of planting date on grain yield and yield components of three winter oilseed rape (Brassica napus L.) cultivars in Fars province

Subject Areas : Journal of Plant Ecophysiology

A. Bahrani ¹ (باشگاه پژوهشگران جوان و نخبگان، واحد رامهرمز، دانشگاه آزاد اسلامی، رامهرمز، ایران)
M. Haghjo ² (باشگاه پژوهشگران جوان و نخبگان، واحد رامهرمز، دانشگاه آزاد اسلامی، رامهرمز، ایران)

Received: 2014-06-18 Accepted : 2014-12-25 Published : 2016-09-01

Keywords: Grain yield, planting date, Yield components, Key Words: Oilseed rape,

Abstract :

In order to investigate the effect of different planting dates on yield and yield components of three canola cultivars (Brassica napus L.), a field experiment was conducted by using factorial with on the basis of randomized complete block design with three replications at Siyakh Darengoon region of Fars province during 2011-2012. Treatments were including four planting dates (6 Sep. 21 Sep. 6 Oct. and 21 Oct.) and three cultivars of winter oilseed rape (Talaye، Likord and Okapi). The results showed that the effect of cultivars on number of pod per plant, number of seed per the pod, 1000-kernel weight and grain yield was significant. The highest grain yield obtained in Talaye cultivar and 21 Sep. with the average of 2006 and 1760 kg ha-1, respectively. Also delay in planting date led to decreasing of number of pod per plant , number of seed per pod, 1000- kernel weight, grain yield and harvest index. In general, it appeared that planting date in 21 Sep. and Talaye cultivar were the most suitable planting date and cultivar in this area and similar regions.