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

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

Received: 2015-09-24 Accepted : 2015-09-24 Published : 2015-09-01

Keywords: Grain yield, planting date, Rapeseed cultivars, Agronomic Characteristics, Harvest index,

Abstract :

In order to investigate the effect of different planting dates on yield and yield components of three canola cultivars a factorial arranged field experiment was conducted on the basis of randomized complete block design with three replications at Siyakh Darengoon region of Fars province during 2011-2012. Treatments included of four planting dates (6 Sep. 21 Sep. 6 Oct. and 21 Oct.) and three winter oilseed rape cultivars (Talaye, Likord and Okapi). The results showed that the effect of cultivars on number of silique per plant, number of seed per silique, 1000-kernel weight and grain yield was significant. The highest grain yield obtained in Talaye cultivar and 21 Sep. with the average of 2006 kg ha-1. Also, delay in planting date led to decreasing of number of silique per plant, number of seed per silique, 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.