Browsing by Author "Türkoǧlu, N."

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The Effects of Different Warm Stratification Periods on the Seed Germination of Some Rosa Taxa
(Academic Journals, 2009) Alp, Ş.; Çelik, F.; Türkoǧlu, N.; Karagöz, S.
In this study, the effects of different warm stratification periods on the seed germination of some Rosa species such as Rosa heckellana ssp. vanheurckiana, Rosa canina, Rosa pulverelanta and Rosa dumalis naturally grown in the Van region were investigated. In 2007, seeds of these species were kept at 25° C warm stratification for 10, 11 and 12 weeks, and then transferred to 5° C for cold stratification till the initiation of germination. Germination response to treatments of R. heckellana ssp. vanheurckiana seeds was different compared to the other species. The seeds of R. heckellana ssp. vanheurckiana germinated in a short time (when they kept in warm stratification followed by cold stratification between 1 - 3 weeks). The seeds of the other species required 5 months of cold stratification after warm stratification to overcome seed dormancy. The overall germination percentage were 18.80% in R. canina, 13.80% in R. pulverelanta and 13.53% in R. dumalis at 25° C of warm stratification followed by 5° C cold stratification. We determined that for these three taxa, the most appropriate method of stratification was 11 week warm stratification followed by cold stratification. © 2009 Academic Journals.
The Useability for Cut Flowering of Hyacinth Culture Types Planted in Different Environments
(2006) Türkoǧlu, N.; Ciǧ, A.
The cut flowering quality criteria of four different types of hyacinth (Hyacinthus orientalis 'Blue Jacket, Carnegie, City of Haarlem and Jan Bos) planted in open air between the years 2003 and 2005 was investigated. It was found that of those planted in the ecological conditions of Van in greenhouse, Jan Bos was the earliest one to be harvested in 112.98 days where as City of Haarlem was the flower with the longest plants size with 212.86 mm and the thickest stalk with 12.45 mm, again planted in a greenhouse. Under the scope of these data, it was determined that the most efficient planting area is greenhouse, the earliest flowering type is Jan Bos and according to the flower criteria the most appropriate type is City of Harlem. © 2006 Asian Network for Scientific Information.