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    DETERMINATION OF THE BEST HERBAGE YIELD AND HYPERICIN CONTENT OF ST. JOHN'S WORT (Hypericum perforatum L.) UNDER SEMI ARID CLIMATIC CONDITIONS
    (Soc Field Crop Sci, 2013) Kizil, Suleyman; Inan, Memet; Kirici, Saliha
    St. John's Wort (Hypericum perforatum L.) has been used as a medicinal herb since ancient times, it contains several natural products with noteworthy biological activities. There is no clear information about harvesting time yield and yield components of St. John's Wort as the plants are collected from wild. Therefore, this research aimed to determine ontogenetic (pre-flowering, full flowering and post-flowering periods) and morphogenetic (bottom, middle and top parts) variations in herb yield and hypericin content of St. John's Wort under Diyarbakir ecological conditions during the 2004-05, 2005-06 and 2006-07 growing seasons. Fresh and dry herb yield, dry leaf yield and hypericin content were recorded. Ontogenetic x morphogenetic interaction resulted in statistically significant effects on yield characteristics and hypericin contents. The plant was not harvested during the seedling year; whereas fresh herb yields in second and third year ranged 2721 to 5607 kg ha(-1) and 2196 to 3955 kg ha(-1) respectively; while dry leaf yield in the second year varied ranged 323 to 1555 kg ha(-1) and in the third year 161 to 928 kg ha(-1), hypericin content in the second and third year varied between 0.022 to 0.093% and 0.018 to 0.065% depending on parts of the plant. Hypericin content varied according to different parts of the plant, and the maximum value of 0.093% was obtained from the top part of the plants at the full flowering period. The results showed that there is a relationship between dry leaf yield and hypericin content of the plant parts and development stages of the plant.
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    Effects of sowing periods and P application rates on yield and oil composition of black cumin (Nigella sativa L.)
    (Wfl Publ, 2008) Kizil, Sueleyman; Kirici, Saliha; Cakmak, Oezlem; Khawar, Khalid Mahmood
    The study reports effects of winter and spring sowings and 0, 40, 80, 120 and 160 kg ha(-1) triple super phosphate (P) application on yield, yield components and fatty acid composition of black cumin during 2003-2004 and 2004-2005 at Diyarbakir, Turkey. The fatty acid methyl esters (FAMEs) were extracted from the reaction vials with hexane. The GC (gas chromatography) analysis was carried out by means of a Varian 3400 apparatus equipped with Supelcowax-10 fused silica capillary column. The results showed that vegetative growth period was the major and meteorological conditions and P doses were the minor factors controlling yield components; such that winter sowing resulted in maximum seed yield (1037 to 1534 kg ha-1), fatty oil content (30.2 to 37.9%) and essential oil content (0.31 to 0.56%). Major constituents of fatty oil were determined as linoleic, palmitic and oleic acid. The percentage of linoleic acid was determined between 43.34 and 51.50%.
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    Öğe
    SOME AGRONOMIC CHARACTERISTICS AND ESSENTIAL OIL COMPOSITION OF HYSSOP (Hyssopus officinalis L.) UNDER CULTIVATION CONDITIONS
    (Wydawnictwo Akad Rolniczej W Lublinie, 2016) Kizil, Suleyman; Guler, Vedat; Kirici, Saliha; Turk, Murat
    Hyssop (Hyssopus officinalis L.) is an aromatic and medicinal perennial herb native to Southern Europe and temperate regions of Asia. The study aimed to determine the effect of different plant parts harvested at different flowering stages: pre-flowering, full-flowering and post-flowering, in some agronomical characteristics, essential oil yield and components of hyssop plant in semi-arid climatic conditions of South Eastern Anatolia, Diyarbakir, Turkey. The results showed that both flowering stages and plant parts had important effects on fresh, dry herbage, dry leaf yield of hyssop, as well as essential oil content. It was concluded that under semi-arid climatic conditions, hyssop plant could be grown successfully in conformity to the limits of ISO standards and harvest from top parts of the plants at full flowering stage could be preferred for maximum dry leaf yield and essential oil contents.