Browsing by Author "Yahyaoğlu, Zeki"

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    Alnus glutinosa subsp. barbata ÇELİKLERİNDE KÖKLENDİRME DENEMELERİ
    (II. Ulusal Karadeniz Ormancılık Kongresi, Cilt. II, s. 423–430, Artvin., 2002) Yahyaoğlu, Zeki; Ayan, Sezgin; Gerçek, Vildane; Şahin, Ayşegül
    Bu araştırmada;Hızlı gelişme özelliği nedeniyle bölgesel odun ihtiyacına cevap verebilecek ve dolayısıyla doğal ormanlar üzerinde sosyal baskıyı bir ölçüde kaldırabilecek Doğu Karadeniz Ormancılığında stratejik önemdeki kızılağaç ele alınmıştır. Bu tür ile yapılacak ağaçlandırmalarda birim alandan alınacak ürün miktarının artırılabilmesi için genetik olarak ıslah edilmiş veya üstün olan fertlerin temin edilmesi gerektirmektedir. Çalışmada; çeliklerin köklendirilmesi üzerinde etkili olan faktörlerden; köklendirme ortamları, hormon dozu, çelik tipi ve materyal kaynağı (ortet yaşı) faktörlerinin etki şekli bağımsız denemelerle belirlenmeye çalışılmıştır. Köklendirme başarısının tespitinde köklenme yüzdesi, ramet boyu ve kök sayısı parametreleri esas alınmıştır.
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    Genetic diversity among populations in Scotch pine (Pinus silvestris L.) seed stands of Western Black Sea Region in Turkey
    (Genetic diversity among populations in Scotch pine (Pinus silvestris L.) seed stands of Western Black Sea Region in Turkey”, African Journal of Biotechnology Vol. 9(43), pp. 7266-7272, 25 October., 2010) Şevik, Hakan; Ayan, Sezgin; Turna, İbrahim; Yahyaoğlu, Zeki
    The aim of this study was to determine the differences among some of the registered seed stands in the Western Black Sea Region in Turkey by means of the morphological characters. The number of 18 morphological characters were designated by measuring and observing on seed (seed length, seed width, seed color and 1000 seed weight), juvenile seedling (root length, hypocothyl length, epycotyl length, cotyledon number, cotyledon length, stem and root dry weight) and seedling (root-collar diameter, number of branches, bud number, stem length, root length, stem and root dry weight) from 9 seed stands in the Western Black Sea Region of Turkey. The obtained data was analyzed by using cluster and penrose analysis. Cluster and penrose analysis showed that there were significant differences within the Pinus sylvestris stands for the morphologic characters.
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    The Vegetative Propagation Possibilities of Black Alder [Alnus glutinosa subsp. barbata (C. A. Mey.) Yalt.]
    (Softwood Cuttings” Pak. Journal of Biological Sciences, 9 (2):238–242., 2006) Ayan, Sezgin; Yahyaoğlu, Zeki; Gerçek, Vildan; Şahin, Ayşegül; Sıvacıoğlu, Ahmet
    In this study, the collecting date of softwood cuttings, rooting media, or-tet age and cutting type were investigated on Alnus glutinosa subsp. barbata (C. A. Mey.) Yalt. Rooting media and cutting type showed no significant effect on the rooting percentage (RP), ramet height (RH) and rootlet number (RN) while or-tet age showed significant effect on these parameters. The highest RP as 56.7 and 48.30 0 were obtained for the tip cuttings and basal cuttings of 1+0 aged oftets, respectively, while the lowest RP as 00 was obtained for the tip cuttings of 2+0 aged oftets. Determimng of the lower RP for the cuttings of 2+0 aged oftets than the cuttings of the older ortets can be explained together with the ortet genetic character. The highest RH (18.3 cm) was obtained for the tip cuttings of the 1 +0 aged 01tets and RN (8.3 number) was obtained for the basal cuttings of the same ortets. The highest mean RP were obtained for the cuttings of 1+0 aged seed originating oftets and physiologically 1+0 aged sprout originating 01tets as 41.35 and 35.55 0 0, respectively. Based on the results of this study, basal cuttings of the young oftets, collected in the middle of the June should be used in the autovegetative propagation ofAlnus barbata.