بررسی مطالعه اثر تاریخ کاشت و میزان بذر بر عملکرد و خصوصیات زراعی دولاین امیدبخش تریترکاله

In order to determine the best planting date and seeding rate of two triticale genotype in Mashhad climate condition on 2007-2009 growing season, an experiment was carried out, using a Split-Plot design based on Randomized Complete Block Design with three replication, at Torogh Agricultural Research Center, Mashhad, Iran. Main plots devoted to five seeding dates and factorial combination of three seeding rate and two triticale genotype were as sub plot. The result showed, the effect of planting date on grain yield, biological yield, harvest index (HI), spike.m-2, total tiller number per plant, fertile tiller number per plant, tiller fertility percent, days to heading, days to maturity and grain filling was significant. Highest grain yield was recorded from second planting date (October 22) and delay in planting date from second planting date (October 22) to fifth planting date (December 6) decreased grain yield about 25%. The effect of seeding rate on biological yield, total tiller number per plant and fertile tiller number per plant was significant too. Despite there was not any significant differences among seeding rates for grain yield and the 250 seeds per m2 was not different from 650 seeds per m2. With increasing seed rate, total tiller and fertile tiller were decreased but tiller fertility percent was not affected by this factor. Significant differences were not observed between two genotype concerning all traits. Key words: Triticale, genotype, grain yield, planting date, seeding rate.

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تریتیکاله ها (فراورده) , ژنوتیپ ها , زمان کاشت , فاصله گذاری , عملکرد زراعی