Study on response of Rapeseed varieties to late planting at Karaj environment

Subject Areas : New Finding in Agriculture

O. R. Sali ¹ , H. Madani ² , A. H. Shirani Rad ³

1 - M.Sc. in Agronomy, Islamic Azad University, Arak, Iran
2 - Assist Professor, Islamic Azad University, Arak, Iran
3 - Assist Professor, Islamic Azad University, Arak, Iran

Received: 2015-12-09 Accepted : 2015-12-09 Published : 2007-05-22

Keywords: late planting, yield, Rapeseed, Planting date, Variety,

Abstract :

    In order to study the effects of late planting on vegetative traits, yield and yield components of rapeseed varieties, an experiment was conducted at research field of Seed  and Plant Improvement Institute (SPII) in Karaj. The experiment laied out in split plot factorial arranged in a RCBD with 4 replications. Two planting dates (Sep. 28th and Oct.  22 Th) were selected  as main plots and 13 varieties (Elite, Olpro, Sinatra, Sahara, Modena, Geronimo, ARG-91004, Dexter, SLMO46, Okapi, Frederic, ORW20-3002, and RG4504) as subplots in a factorial arrangement were evaluated. Traits were considered as plant height, stem diameter, number of pods per plant, number of seed per pod, thousand grains weight and the grain yield. Results showed that delay in planting date, the height of the plant, stem diameter and number of seed per pod were reduced, but it was not significant, and regarding the number of pods in the plant, the delay increased the afore–mentioned characters. Among rapeseed varieties, the Olpro variety has the highest height plant by   126 cm. But, regarding stem diameter no significant decrease was observed. The greater number of pods per plant was observed in Sinatra variety with an average of 78.47 and also the greater number of seed per pod belonged to SLM046. The highest thousands grain weight was observed in RG4504 variety  and about the grain yield, the lightest yield belonged to the first planting time and in Elite variety with a rate of 5271 kg/ha.

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