Evaluation of the Response of Spring Canola (Brassica napus L.) Cultivars to Delay Sowing Dates

Subject Areas : Journal of Crop Ecophysiology

Asadolah Zareei Siahbidi ¹ , Abbas Rezaeizad ² , Ashkan Asgari ³ , Amir Hosein Shirani Rad ⁴

1 - Assistant. Professor, Horticulture Crops Research Department, Kermanshah Agricultural and Natural Resources Research and Education center, AREEO, Kermanshah, Iran
2 - Associate Professor, Horticulture Crops Research Department, Kermanshah Agricultural and Natural Resources Research and Education center, AREEO, Kermanshah, Iran
3 - Assistant Professor, Agricultural Engineering Department, Minab Higher Education Center, University of Hormozgan, Bandarabbas, Research Group of Agroecology in Dryland Areas, University of Hormozgan, Bandar Abbas, Iran
4 - Professor of Seed and Plant Improvement Institute(SPII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran

Received: 2019-12-14 Accepted : 2020-10-26 Published : 2021-06-22

Keywords: Seed yield, Plant height, Delayed sowing, Flowering,

Abstract :

Response of sowing date on some agronomic traits of spring canola cultivars was studied by using a split plot experiment based on randomized complete block design, during growing seasons of 2014 to 2016 at the research farm of Islamabad Gharb Station, Iran. Planting dates were considered as the main plot in three levels from October 7 to 27 and eleven spring canola cultivars as sub plot. In both years, planting dates of October 27 after emergence due to cold and frost was eliminated and the results of analysis of variance were carried out for two planting dates of October 7 and October 17. The results showed that the effect of planting date was significant on the seed yield. Mean seed yield of cultivars were 3738 kg.ha-1 on October 7th and 2245 kg.ha-1 on October17th, respectively. The cultivar Jerry produced the highest (4123 kg.ha-1) and the RGS003 lowest seed yields (2464 kg.ha-1). On planting date 7th of October, the highest seed yield was related to Jerry cultivar and the lowest seed yield was related to the Hyola 401 cultivar (1794 kg.ha-1) on the 17th of October.

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