Ozbahce A.,Soil Fertilizer and Water Resources Central Research Institute
Australasian Plant Pathology | Year: 2014
In this study, the effect of fungicides used to control the soil-borne pathogen (Fusarium oxysporum f.sp.melonis), on melons growth (Cucumis melo cv. EdalI), under water stress was researched. The experiment was conducted in a field naturally infested as in a split-plot design with four replications in 2011-2012, at Çumra in the Konya Plain, Turkey. The main plots were four levels of water supply. Irrigation was supplied at the appropriate crop development stage with enough water to fill the soil depth of 0-90 cm to capacity (I1), 25 % (I2), 50 % (I3) decreased water supply levels and in a water-free (I4) condition were maintained. In subplots, fungicides that are no fungicide (F0), Fludioxonil + Metalaxyl-m (F1) and Hymexazol (F2) were used. The F1 (250 ml da-1) and F2 (500 ml da-1) were drip chemigated at planting and again 15 days after planting. Both fungicides applied through chemigation were similarly effective on soil-borne pathogen management and resulted in yields higher than untreated control in both years. The highest yield (2.88-3.75 t da-1) was obtained under no water stress (I1) and F1 applications (p∈<∈0.01). Other fruit quality parameters were significantly affected by treatments. The seasonal water consumptive use (ET) of I1 treatment was recorded at 470 and 501 mm, respectively, for both years. © 2014 Australasian Plant Pathology Society Inc.
Kusvuran A.,Cankiri Karatekin University |
Kiran S.U.,Soil Fertilizer and Water Resources Central Research Institute |
Nazli R.I.,Cukurova University |
Kusvuran S.,Cankiri Karatekin University
Fresenius Environmental Bulletin | Year: 2015
A screening study was conducted in order to determine the genotypic differences of 20 maize varieties, and to evaluate the mechanism of ion regulation under salt stress conditions. The study was arranged in a completely randomized plot design with 4 replications under controlled conditions in 2013. Seeds were planted in plastic pots with a mixture of peatperlite at a ratio of 2:1. At 27 days after sowing, the salt (NaCI) treatment was started. The varieties were classified according to the severity of the leaf damage symptoms, using symptoms score of 1-5. The fresh and dry shoot weights, fresh and dry root weight, leaf number, plant height, stem diameter, relative water content, and the shoot and root concentrations of sodium, potassium, calcium, and chlorine were also investigated. The varieties exposed to 250 mM NaCI application developed different mechanisms to be protected against toxic effects of Na ion. Salt tolerant varieties limited Na accumulation and acted selectively among ions. K and Ca concentrations were high in shoot and root in which Na concentration was low, and tolerant varieties had higher K/Na and Ca/Na ratios than sensitive varieties. In conclusion, the maize varieties showed a wide variation in their response to salt stress. Reliable and effective screening parameters, such as scale, shoot and root freshdry weight, ion content, for determination of salt tolerance level of the maize varieties were discussed. Overall findings suggest that PG 1661, Ada 523, Colonia, PG Pasha, and PG 1610 varieties were more tolerant varieties than the other ones.
Ozbek K.,Field Crops Central Research Institute |
Cebel N.,Soil Fertilizer and Water Resources Central Research Institute |
Unver I.,Ankara University
Turkish Journal of Agriculture and Forestry | Year: 2014
Conspicuous vegetation entities of pedogenic soils rich in cadmium and their diethylene triamine pentaacetic acid (DTPA)-extractable Cd content (DCd) under the temperate continental and Mediterranean climatic conditions of western Anatolia were determined. Foliage of herbaceous plants and nearby soil samples was collected from 51 zinc mining areas. DCd content was found to reach 11.6%-16.2% of the total Cd content, indicating more extractability than in many other heavy metals. Growth chamber and nursery experiments were conducted with the seeds collected. Dactylis glomerata and Galium tenuissimum subsp. tenuissimum, both common in grazing lands, were found to be accumulating 23.5 mg Cd kg-1 and 22.3 mg Cd kg-1 dry matter, respectively, which are highly phytotoxic levels. Thlaspi praecox, known as a Cd-hyperaccumulating plant species, could not be successfully introduced into the Cd-rich mining soils under controlled conditions, suggesting genetic variation or inability to adapt. Volunteer species under controlled conditions included Poa bulbosa and Plantago lanceolata, both of which were potential Cd-hyperaccumulating candidates. Silene aegyptiaca and Silene vulgaris were other species commonly found around zinc mines and they were grown under controlled conditions without difficulty. However, Cd concentrations in the above-ground tissues of all species mentioned above were not over the 100 mg kg-1 dry matter threshold value for hyperaccumulating cadmium. © TÜBİTAK.
Kale S.,Suleyman Demirel University of Turkey |
Karabulut A.,Soil Fertilizer and Water Resources Central Research Institute |
Ergul F.,Izmir Development Agency
Journal of Food, Agriculture and Environment | Year: 2012
Trace element transfer model was performed to estimate salt loading in soil on 1500-hectare study area located on Kesikkopru Basin of Central Anatolia Region in Turkey. The model was run for 43 sampling locations, which are selected from different crop patterns and different soil types. The predicted and measured salt loads in soil were compared at the end of the study period. The soil salinity observation data and model estimation results in different depths were prepared as a geodatabase to be integrated into ArGIS. The salinity map was produced by ordinary kriging interpolation method. According to statistical evaluations, model showed acceptable prediction for soil salinity with the coefficient of determination (R 2) values (0.75 to 0.88) and modeling efficiency (E) values (0.58 to 0.72). Also, the model was run for the next 10 years to simulate soil salinity changes in the future. The results show that salinity will be a potential risk for the basin in the future. The salinity projection in soil for 2014 was estimated with leaching and without leaching fractions. While the salinity in soil profile varied between 8 and 12 dS m -1 without leaching, the salinity amount reduced drastically to 0-6 dS m-1 with leaching applications.
Ozbahce A.,Soil Fertilizer and Water Resources Central Research Institute |
Zengin M.,Selcuk University
Journal of Plant Nutrition | Year: 2014
This study was carried out in order to determine the effect of various manganese fertilizers [manganese sulfate (MnSO4.3H2O) (MS), 27% manganese (Mn) and manganese ethylenediaminetetraacetic acid (Mn-EDTA) (ME), 12% Mn], their doses (0, 6, 9, 12 mg Mn kg-1 for the soil and 0, 0.2, 0.3, 0.4% for the leaf) on yield and net return of dwarf bean. Field experiments were conducted in the randomized blocks split plot design with four replications under Konya ecological conditions in Turkey. Soil applications were made on bands as a single application at sowing whereas foliar applications (FA) were made at two times. Results of the field experiments showed the highest bean yields were significantly obtained by the fertilizer of ME-FA sprayed (243.80 and 257.74 kg da-1). For both years, the lowest yields were obtained by the MS-SA applications (166.97 and 180.60 kg da-1). The maximum net income was US $104.16 da-1 and US $156.06 da-1 by years. © 2014 Copyright Taylor and Francis Group, LLC.