Browsing by Author "Çoban H."

Now showing 1 - 8 of 8
  • No Thumbnail Available
    Item
    Effects of different types and levels of zinc sulphate applications in vineyards (Vitis vinifera L.) in a semi-arid environment
    (Chemical Publishing Co., 2007) Aydin Ş.; Yaǧmur B.; Hakerlerler H.; Çoban H.
    The present study was carried out to determine the effect of soil and foliar applications of different rates of zinc in the vicinity of Alaşehir, one of the most important viticultural centres in the Westem Aegean Region where the round seedless grape cultivar (Vitis vinifera L.) is widely grown, on productivity and some chemical quality characteristics as well as leaf primary and secondary elements. Zinc was applied to soil and foliage as ZnSO4·7H2O in the experiment with four replications. One soil application (0-15-30-45 g ZnSO4·7H 2O/vine) in addition to foliar application replicated three times (0.0-0.025-0.050-0.10% Zn). Both soil and foliar zinc sulphate (ZnSO 4·7H2O) applications increased the amount of fresh grapes per vine.The highest yield was observed at 30 g ZnSO4· 7H2O level per vine in soil application and at the rate of 0.05% Zn in foliar application. Zinc sulphate produced a significant positive effect on the contents of primary and secondary elements (N, P, K, Ca, Mg, Fe, Zn, Mn, Cu) of the leaf (lamina and petiole) with the exception of the leaf petiole manganese content in the soil application and the leaf petiole copper content in the foliar application. Soil and foliar applications of zinc sulphate negatively affected the firmness of the berry flesh. The only fruit quality characteristic positively affected by soil and foliar applications of zinc sulphate was the amount of total soluble solids. Despite the fact that the soil application of zinc sulphate did not have any significant effect on some sugar fractions, the foliar application increased only the fructose and α-glucose significantly. In conclusion, it was established that foliar application of zinc sulphate was slightly more effective on yield as well as some quality characteristics as compared to soil application. Therefore, it was concluded that foliar application could be preferred as it is more economical and easier to apply.
  • No Thumbnail Available
    Item
    Determination of polyphenol oxidase activity during rooting in cutting of some grape varieties (Vitis vinifera L.)
    (Chemical Publishing Co., 2007) Çoban H.
    Poly phenol oxidase (PPO) activity was investigated during rooting in cuttings from six grape cultivars (Vitis vinifera L. cvs. Sultana, round seedless, Yalova incisi, Trakya ilkeren, Pembe Gemre and Cardinal) and the enzyme activity and rooting ability were compared. Rooting was observed on Sultana, round seedless, Yalova incisi and Trakya ilkeren cuttings, but not on the pembe gemre and cardinal cuttings. PPO activity started to increase in the early stage of the experiment and decreased after root emergence in the Sultana, round seedless, Yalova incisi and Trakya ilkeren cuttings. However, enzyme activity started to increase in the early stages and continued throughout the experiment in the pembe gemre and cardinal cuttings. In concluded that PPO does not any effect on the after formation of the root. However, it is found that PPO affects cell division, cell differentiation and the development of root primordial considerably.
  • No Thumbnail Available
    Item
    Effects of plastic covering on yield, physical and chemical characteristics of some table grapes (Vitis vinifera L.)
    (Chemical Publishing Co., 2007) Çoban H.
    This study was aimed to determine the effect of plastic covering on phonological stages (bud-burst, blooming, verasion, ripening) and the physical characteristics (the yield, cluster weight, cluster length, cluster width, berry weight, berry length, berry width, berry rupture point force, shoot weight, shoot length) as well as the chemical characteristics (total soluble solids, titratable acidity and sugar fractions) of Cardinal, Yalova Incisi and round seedless grape cultivars. The trial were planed as a plastic greenhouse for each variety. The greenhouse, including three lines of the vines were covered by 5.0 m in height and 8.0 m in width with UV and IR type of polyethylene, from mid-February to mid-April. Side lines were ignored due to the border effect and only middle lines of the vines were statistically analyzed by t-test for paired plots.
  • No Thumbnail Available
    Item
    Effect of phosphonic acid (2-chloroethyl) on physical and chemical characteristics of trakya ilkeren and red globe table grapes (Vitis vinifera L.)
    (Chemical Publishing Co., 2008) Çoban H.
    In this study, the effect of phosphonic acid (2-chloroethyl) on the physical and chemical characteristics of Red globe and Trakya ilkeren table grapes were determined. The experiment was completely randomized block desing with 10 treatment combinations replicated in three blocks. Ethephon (active ingredient of Ethrel®, containing 480 mg L-1 ethephon) of four dosages and a control (0 control, 150, 300, 450, 600 mg L-1) were applied at a spray volume of 1000 (L ha-1) to bunches using a backpack pressure sprayer with hand to ensure thorough wetting and applications times (T1-T4). The application times (T) may be described as follows :T1-beginning of berry colour; T2-20 to 25 % berry colour; T2-40 to 50 % berry colour and T4-80 to 90 % berry colour. It was found that various ethephon application times and dosages generally had statistically no significant effects on physical characteristics (berry weight, berry length, berry width) and sugar fractions (fructose, β-glucose, α-glucose, sorbitol, galactose) in all grape varieties. However, chemical characteristics were observed a decrease titratable acidity and an increase total soluble solids and the amount of color pigments (total anthocyanins). As results of the study, general recommendations are made of 300 (mg L-1) ethephon for Red globe and Trakya ilkeren table grapes, both applied at 20 to 25 % berry colour (T2).
  • No Thumbnail Available
    Item
    Investigation to determine fertility status in a semi-arid environment of agricultural areas, Turkey
    (Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma, 2008) Çoban H.
    This research was conducted on the high quality agricultural land of the district of Alaşehir in the Manisa region of Turkey, where total agricultural land covers 457, 699 ha. Soil samples, representing a total area of 8400 ha, where mostly grapes, cherry and vegetables are grown, were taken within the depths of 0-30 and 30-60cm. Soil samples were collected from 145 different points in the sampled area. Two samples were taken at every point, making a total of 290 soil samples, which were analyzed to determine their physical and chemical properties. The results show the productivity characteristics of these agricultural soils. The results indicate that the soils are highly calcareous, with high pH, low levels of organic matter phosphorous and potassium. The sampled soils are deficient in zinc and iron (approximately 70-78% of the samples), manganese (50-55% of the samples), but have an excess copper content (approximately 95% of the samples) and excess boron content (approximately 50% of the samples).
  • No Thumbnail Available
    Item
    The Effects of Applications GA3, Cluster Tipping and Girdling on Yield and Quality in Superior Seedless (Vitis vinifera L.) Grape Variety; [Süperior Seedless (Vitis vinifera L.) Üzüm Çeşidinde GA3, Salkim Ucu Kesme ve Bilezik Alma Uygulamalarinin Üzüm Verim ve Kalitesine Etkileri]
    (Ege Universitesi, 2023) Camci H.; Çoban H.
    This study was carried out on own rooted 7 years old Superior Seedless (Vitis vinifera L.) table grape variety in a vegetation season of 2015 in Ahmetli district. The experiment was completely randomized block design with 7 treatment combinations replicated in three blocks. When all treatments was used at fruit set, GA3as 10 ppm dosage used for elongate cluster (when cluster length reached 7-8 cm). Control (C) only water was sprayed. The aim of this study was revealed effects of applications on grape yield and some quality characteristics of Cluster Tipping (CT), Girdling (G), CT+G, GA3+CT, GA3+G, GA3+G+CT. It was found that all applications generally had statistically (P<0.05) significant effects on grape yield, cluster weight, cluster width, berry length, berry width, berry length/berry width, soluble solid and titratable acidity in Superior Seedless. The highest grape yield, cluster weight, cluster length were obtained in GA3+G, the highest berry weight, the longest berry length were obtained in G, the highest soluble solid value were obtained in GA3+ CTR+ G and GA3+G respectively. As results of this study, general recommendation is made of GA3+G the most suitable application for growing Superior Seedless table grape variety. © 2023 Ege Üniv. Ziraat Fak. Derg.. All rights reserved.
  • No Thumbnail Available
    Item
    Sun-infrared heating film drying analysis of Sultana seedless grapes: Operating modes
    (Elsevier Ltd, 2024) Çoban H.; Şevik S.; Abuşka M.
    In contrast to the technique of utilizing infrared heating films (IRHFs) as the main or auxiliary heating source in the dryer, this study investigated the quality and performance parameters of sun drying the Sultana seedless grapes (Vitis Vinifera L.) on IRHFs without using a dryer system. In this context, sun drying with four IRHF operating modes was analyzed: sun drying (Model-1), sun + daytime IRHF (Model-2), sun + 24 h IRHF (Model-3), and sun + night IRHF (Model-4). Model 1 used no electricity, whereas the other models consumed 7.21, 10.38, and 9.80 kWh of electricity. The average drying efficiency of all drying models varied between 5.25 % and 16.48 %. Considering all experiments, average De values changed from 4.2837E−07 to 5.443E−07 m2/s. The drying times were significantly shortened (2–3 times faster) in Models 2 and 3, and the color quality was highest in Model 4. Moreover, grapes dried using sun + IRFH gave the best results regarding physicochemical and bioactive quality properties such as pH, total phenol, total tannin, vitamin C, and total sugar compared to Model-1, which requires a long drying period. This study's findings indicate that sun drying with IRHF, which shortens drying time and offers higher quality in terms of color and food content, may be an alternative method that can be adapted to the traditional sun drying method. © 2024
  • No Thumbnail Available
    Item
    Drying of Sultana seedless (Vitis vinifera L.) grape variety in indirect drying chamber using solar air collector with conic dimpled absorber: The case of end-season drying
    (Elsevier Ltd, 2024) Çoban H.; Abuşka M.
    The main functions of mechanical drying are to extend the drying season, prevent reduction in dry product mass due to immature harvest, and obtain high-quality products without exposure to rainy weather conditions. A SAC with a conic dimpled absorber-assisted indirect solar dryer was designed, manufactured, and tested for the Sultana Seedless grapes under the end-season conditions. Also, the effect of medicinal chamomile oils on the color quality of raisins was investigated. While the first three days of the drying experiment were reminiscent of summer, the remaining days were characteristic of autumn. The thermal efficiency of the collector at a flow rate of 0.05 kg/s was realized as 66.33 % and 48.27 % on average during the days (between hours of 10:00–15:00), depending on the psychrometric conditions. The moisture content of the grapes (22.5 brix) decreased from 3.37 to 0.22 kgw/kgsm and lasted for 272 h/12 days. It has been revealed that the collector efficiency and drying time were significantly affected by the psychrometric conditions, and the use of medicinal chamomile oil in dipping pretreatment increased the color quality of raisins. Effective use of the SAC in the end-season drying process should be increased by techniques such as serial connection and heat storage. © 2023 Elsevier Ltd