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Öğe A COMPARATIVE STUDY ON THE EFFECTS OF DIFFERENT CONVENTIONAL, ORGANIC AND BIO-FERTILIZERS ON BROCCOLI YIELD AND QUALITY(Corvinus Univ Budapest, 2018) Altuntas, O.In this study, we evaluated the effects of fertilizers of different origin on broccoli yield and some characteristics. For this purpose, 9 different fertilizers were used. The different fertilizers used in the study were; NT; Control (No Treatment), FM; Farm Manure (approximate 2-4% N) CF; Chemical Fertilizer (46% N, 46% P2O5, 51% K2SO4), HA; Humic Acid, AA; Amino Acid, HFA; Humic and Fulvic Acid, ALG; Microalgea, ART; Arthrobacter sp., BAS; Bacillus subtilis strain QST 713. During the vegetation period, the plant growth parameters were measured twice in the growth season. The first measurement was performed after 40 days of planting, while the second was done after 70 days. Two plants were harvested from each replication in order to determine the plant growth parameters of shoot fresh weight, root fresh weight, plant height, root length, shoot and root dry weight and the number of the leaves. At the end of the experiment, mineral contents of leaves, total yield and ascorbic acid contents of broccoli heads were determined. As a result, it was determined that some organic fertilizers and biofertilizers increased the yield, various plant growth parameters, nutrient uptake of broccoli and ascorbic acid contents of broccoli heads at a significant level.Öğe The Effectiveness of Grafting to Improve Salt Tolerance of Sensitive Melon When the Tolerant Melon is Use as Rootstock(Elsevier Science Bv, 2015) Dasgan, H. Yildiz; Balacheva, E.; Yetisir, H.; Yarsi, G.; Altuntas, O.; Akhoundnejad, Y.; Coban, A.Melon is one of the important species of the Cucurbitaceae family. However the salinity sensitivity of the melon is the significant limitation in melon production areas. Grafting can be an alternative solution for saline conditions however the rootstock affinity of melons with the other species of the Cucurbitaceae family, mainly different squashes, is still economically uncertain. Therefore may be the melon itself can be good rootstock for the melon scions. In this research, the melon rootstock for melon scion was studied for salinity tolerance. Melon cultivars that are sensitive and tolerant to salinity were reciprocally grafted and plants were grown under salt stress with control plants. Growing culture was vermiculite and plants were irrigated by the complete nutrient solution. Thirty days old melon plants, grafted and un-grafted were subjected to salinity stress during 25 days with 100mM NaCI. Some physiological parameters were investigated. Grafting on the tolerant melon increased the responses of the sensitive melon to salinity in comparison to the un-grafted one. The shoot fresh weight and leaf area both were increased by 27%, leaf water potential was increased by 65%. Leaf membrane injury was decreased by 13 and stomatal conductance was increased by 18%. Grafting technique and salt tolerant-melon-rootstock can be good solution for melon production under the saline conditions. (C) 2015 The Authors. Published by Elsevier B.V.Öğe The effects of biofertilisers on soilless organically grown greenhouse tomato(Int Soc Horticultural Science, 2017) Dasgan, H. Y.; Cetinturk, T.; Altuntas, O.In the present study, greenhouse tomato ('Jaledo') was grown with organic nutrition by the inoculation of some biofertilizers under the soilless cultivation rules. The treatments were three different biofertilizers; 1) mychorrhiza, 2) vermicompost, 3) fermentation microorganisms (EM), and 4) control. The experiment was carried out in the glasshouse during the spring cultivation period under Mediterranean climate conditions. The growing medium was a mixture of peat:perlite in the ratio of 1:1. The constant nutrition in all treatments with the certified organic fertilisers was used to feed the plants beside the biofertilizers. Some plant growth parameters such as plant height and leaf number were similar in the treatments. The tomato yield was the highest in vermicompost, it was 8.3% higher than the control plants. Mychorriza treatment also increased the yield by 2.5%, however, the fermentation microorganisms (EM) decreased the yield by 12.4%. The fermentation bacteria (EM) may compete with the plant for available nutrients in the root medium. Mean fruit size and fruit volume was higher in vermicompost and mychorriza. Total soluble solids (brix) and titradible acidity were higher in the EM. At the end of the experiment, EC inside the growing medium was measured and the biofertilizers, especially mychorriza, decreased the EC, that could be important to prevent salinization in root medium during growing. Leaf nutrient analysis showed that the tomato plants were adequately fed under the experimental conditions, in some cases, the advantages of biofertilizers was seen, for example the leaf Na concentration was the lowest in mychorriza treatment. The results showed that as sustainable approach, the greenhouse vegetables can be produced under the rules of soilless cultivation in organic growing medium by the combination of organic nutrients and the biofertilisers like vermicompost and myhcorriza.Öğe The effects of liquid vermicompost applications on yield and some plant growth characteristics of onions(Int Soc Horticultural Science, 2019) Altuntas, O.; Kucuk, R.; Durak, A.; Kutsal, I. K.This study was conducted in order to determine the effects of liquid vermicompost applications on yield, quality and plant growth in onions grown during the 2017 vegetation period under open field conditions in the cultivation area of the Agriculture Department of the Turgut Ozal University Horticulture Faculty. Control plants were fertilized with conventional fertilizers while other plants were treated by applying only liquid vermicompost in 3 doses: (200, 400 and 600 L ha(-1)). The vermicompost treatments were performed a total of 5 times at 20-day intervals. Chemical fertilizer was applied twice during experiment. The full dose of P and half dose of N fertilizer were applied at transplanting and the remaining half dose of N was side-dressed 30 days after transplanting. The treatments were repeated three times in randomized plots. Harvested bulbs were examined for total yield (kg m(-2)), plant height (cm), bulb length and diameter (mm), skin flesh thickness (mm), bulb diameter (mm), single bulb weight (g), pH, total soluble solids (%), titrable acidity and color values. Liquid vermicompost treatments significantly affected the total soluble solids; L, a and b color values; pH and total yield. The highest average yield (1,321 kg m(-1)), average bulb weight (121,86 g bulb(-1)), bulb diameter (67.45 mm) and color value (15,16) were obtained from plants treated with 400 L ha(-1) of liquid vermicompost, while the highest total soluble solids (16%) and an L color value of 49.26 was obtained from plants treated with 600 L ha(-1).Öğe OPTIMIZATION AND COMPARISON OF THE EFFECTS OF VERMICOMPOST AND CONVENTIONAL FERTILIZATION ON SPINACH (SPINACIA OLERACEA L.) GROWTH(Corvinus Univ Budapest, 2018) Altuntas, O.; Durak, A.; Kucuk, R.Vermicompost helps soil to retain water, regulate soil temperature and structure, and helps solve the soil's nutrient problem. The aim of our study was to compare chemical fertilization with different rates of vermicompost treatments in terms of growth properties, yield, and nutrient element content of spinach (Spinacia oleracea L.). We also determined the appropriate rate of vermicompost application for spinach The experiment was repeated in two successive seasons with five treatments in the experiment: (1) control, (2) 1 ton vermicompost/ha, (3) 2 tons vermicompost/ha, (4) 3 tons vermicompost/ha, and (5) chemical fertilization. To assess the effect of the treatments in spinach, soil analysis (soil texture, pH, EC (Electrical Conductivity), percent of calcium carbonate, organic matter, and macro and micro elements), plant height and yield of spinach plants, and plant nutrient element analysis of spinach leaves were performed. Evaluation of the results indicated that vermicompost had positive impacts on the soil and the plant; the best treatment rate was 3 t/ha. This vermicompost application rate resulted in a 149% yield increase compared with the chemical fertilizer treatment.Öğe The optimization of nitrogen dosages on cucumber plants grown in greenhouse(Int Soc Horticultural Science, 2017) Altuntas, O.; Dasgan, H. Y.In recent years, the intensive usage of either pesticides or overdose of fertilizers caused both an increase in plant production and showing up some products which would threaten human health. The chemicals (pesticides, fertilizers, etc.) which are being used in agricultural production, have made their potential negative influence both on human and society health evident. For that purpose, as a new mode of production Organic Farming manifested itself. In organic fresh vegetable growing, one of the most important topics which still needs to be studied is plant nutrition. The most important deficiency in plant nutrition is nitrogen nutrition. Nitrogen is the most commonly used plant nutrient element in production. Nitrogen sources that are being used in organic production are limited and their pure nitrogen contents are weak. Cucumber, is the second most grown vegetable just after tomato in greenhouses in Turkey. It is consumed both winter and summer and it is also a vegetable which is on the market the whole year. Besides, because of its long vegetation time and its tendency of making much vegetative texture, it is one of the most nitrogen using vegetables. This study was carried out in the greenhouses of Cukurova University, Karaisali Vocational College in Adana, in order to determine the optimum nitrogen dosage to be applied in organic cucumber production under greenhouse circumstances of the spring season. For this purpose, a common organic certified fertilizer was applied as the nitrogen source contending 10.21% pure nitrogen was used. The nitrogen doses of 0, 0.5, 1.5, 2.5 and 3.5 kg ha(-1) were applied, in total six applications. During the trial, in order to investigate the effects of different nitrogen dosages on plants growth parameters were measured. Also, nutrient element contents of leaves were analyzed, fruit physical characteristics and the yield values were measured. Consequently, it was determined that top two nitrogen dosages (2.5 and 3.5 kg ha(-1)) increased the plant growth. In terms of the yield, it is concluded that the dose of 1.5 kg ha(-1) would be enough for increasing this parameter.Öğe The organic nutrition on hydroponically grown greenhouse melon(Int Soc Horticultural Science, 2017) Dasgan, H. Y.; Yucebilgic, A.; Altuntas, O.Greenhouse melon was grown by organic nutrition in 1:1 cocopeat-perlite mixture (v/v). The licensed fertilizers in organic farming were the treatments of the experiment. Three different organic fertilizers were compared to each other and a control. The treatments with their trade names were; 1) Biofarm (liquid), 2) Complex (liquid), 3) Pattrone+Chamlica (powder), 4) Control. The control plants were fertigated by the conventional nutrient solution that was prepared by synthetic inorganic fertilizers. The experiment was carried out in the glasshouse during the spring cultivation period under Mediterranean climate conditions. Plant growth parameters (plant height, total shoot fresh weight, number of leaves plant(-1), stem diameter) were not significantly affected by the treatments. However, melon yield was higher in the organic fed plants in comparison to control ones. The melon plants fed with complex fertilizer produced the highest yield. It was 74% higher than the control. The other two organic fertilizers, Biofarm and Patrone+Chamlica, produced 17 and 15% higher melon yields than the control, respectively. Melon fruit total soluble solids (TSS) and fruit mean weight were similar in the different organic fertiliser's fed plants and higher than the control.
