Browsing by Author "Murat Asma, B."

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Studies on the Effect of Npk Fertilization on Frost Tolerance in the Hacihalilodlu Apricot (Prunus Armenica L.) Cultivar
(International Society for Horticultural Science, 2000) Akća, Y.; Murat Asma, B.; Ayhan, C.
This study was conducted to determine the effect of NPK fertilization on the frost tolerance in the HacyhaliloSlu apricot cultivar in the years 1996-1997. The fertilizer treatments comprised all factorial combinations of 4 levels of N (No=0.0, N1=0.2, N2=0.4 and N3=0.6 kg of N per tree per year), 3 levels of P (P,=0.2 P2=0..4 and P3=0.6 kg of P2O5 and 3 levels of K (Ki=0.4, K2=0.8 and K3= 1.6 kg K2O). These treatments were applied to the trees between 1994-1997. Samples of two twigs were collected and exposed to artificial freezing tests, periodically between December and March. The artificial freezing was made at -10C° for a duration of 7 hours. Statistically significant differences were found between the frost tolerance of NPK-treated flower buds of the HacyhaliloQlu cv. The frost tolerance abilities, at the investigated NPK doses, were found to be higher in January and lower in December and March. Potassium and phosphorus fertilizers had significant effects on the frost tolerance of flower buds. Potassium fertilizer played the most important role on frost tolerance, compared with nitrogen or phosphorus fertilizers. The results indicated that, the frost tolerance of flower buds following K2O applications was higher than that of buds treated with other NPK doses. Lower survival percentages of buds were found with nitrogen applications. The frost tolerance ability was found to be lower following fertilization at the higher doses of nitrogen. In all the investigated NPK doses, the level of K and Fe increased from January to February, in parallel with the frost tolerance ability of the flower buds, but decreased in November and March.
Study on the Frost Tolerance of Important Apricot (Prunus Armenica L.) Cultivars
(International Society for Horticultural Science, 2000) Akça, Y.; Muradodlu, F.; Murat Asma, B.
This study was conducted between the years of 1996-1998 in order to determine frost tolerance of Adilcevaz 5, Çölodlu, Hacýhalilolu, Hasanbey, Kabaapý, Kadýodlu, Luizet, Paviot and Tokalodlu apricot cultivars and determine the relationship between tolerance to frost and macro and micro elements contents. Samples of flower buds were collected and exposed to artificial freezing tests periodically between December and March. Importance differences were found between the ability of cultivars to tolerate frost. The frost tolerance ability of the investigated cultivars was found to be higher in January and February, than in December or March. Kadýodlu,Çölodlu, Kabaajpý, Adilcevaz 5 were found to be cultivars exhibiting tolerance to frost. Nitrogen and Magnesium levels did not show any important changes during the experimental periods. However, the levels of K and Cu increased regularly. In all the investigated cultivars, the level of Ca, Mn and Zn increased from January to February, in parallel with the frost tolerance ability of the tested cultivars, but decreased in December and March. The level of Na was found to be low in January and February but high in December and March.