Effects of sowing dates on some morphological and phenological characteristics and yield of safflower cultivars (Carthamus tinctorious L.)
Subject Areas : Journal of Plant Ecophysiology
hamed javadi
1
(
عضو هیئت علمی دانشگاه پیام نور
)
غلامرضا زمانی
2
(
عضو هیات علمی دانشگاه بیرجند
)
Keywords: ", Safflower", , ", Local Isfahan", , ", Zarghan", , ", LRV", , "Growth degree day",
Abstract :
In order to study the effects of sowing dates on some morphological and phenological characteristics and yield of safflower (Carthamus tinctorious L.) cultivars, a field experiment was conducted in Azad University of Birjand Research Farm during growing season of 2006-2007. The experiment was done as split plot based on completely randomized block design with three replications. In this study four sowing dates (15 Oct, 30 Oct, 15 Nov, 30 Nov) were used as main plots and three varieties (local Isfahan, Zarghan and LRV) were as sub plot. Results showed that, plant height, number of branches per plant and height of first flowering branch from ground level, were affected significantly by sowing date. Also, effect of sowing dates on duration of seed emergence, stem elongation, blooming, flowering and ripening was significant. With delay in sowing date, duration of all phenological period decreased. Maximum grain yield (1209kg/ha) was obtained in the first sowing date and when delay to 30 Nov, grian yield decreased about 56.5 percentage. Effect of cultivar on some traits such as plant height, number of branches, height of first flowering branch from ground level and grain yield was significant. Duration of seed emergence was affected significantly by cultivar. Interaction effects between sowing date and cultivar were significant for all traits, except duration of plant height, number of branches per plant, seed emergence, blooming and ripening. According to these results, maximum grain yield obtained from 15 Oct sowing date and LRV cultivar.
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