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Öğe Determination of Germination Threshold Value of Chickpea Varieties with GGE Biplot Method Under Different Irrigation Water Salinity Conditions(Ankara Univ, Fac Agr, 2022) Tas, Ismail; Tutenocakli, Tulay; Coskun, Yalcin; Akcura, MevlutFor sustainable agricultural production, besides drought, plant resistance to irrigation water and soil salinity should be investigated. Researchers mostly focused on salinity and drought resistance of common species such as wheat, barley, maize, etc. However, the number of studies on chickpea with various uses is quite limited. In the present study, 11 chickpea varieties (Aksu, Arda, Hasanbey, Azkan, Cagatay, Aslanbey, Inci, Seckin, 21C, 42C and EN1867) were subjected to germination tests under different levels of irrigation water salinity (ECi) conditions to identify irrigation water salinity resistant and sensitive varieties. In germination tests, besides control treatment (0 dS/m), five different EC levels (6, 8 10, 12 and 16 dS/m) were used in germination solution. The sodium absorption ratio of saline waters was adjusted to be below 3. GGE biplot method was used for visual assessment of genotype response to saline irrigation waters. The threshold salinity value for germination was identified as 12 dS/m based on germination ratios and seedling dry weights, 8 dS/m based on seedling stem lengths and 10 dS/m based on seedling root lengths. Based on germination ratios and seedling dry weights, Azkan cultivar was identified as the most resistant and Cagatay cultivar was identified as the most sensitive cultivar to irrigation water salinity.Öğe EFFECTS OF SALT AND WATER STRESS ON YIELD AND VEGETATIVE GROWTH PARAMETERS OF BASIL (OCIMUM BASILICUM L.)(Parlar Scientific Publications (P S P), 2017) Tas, IsmailThe present study was conducted to assess the response of lemon balm to irrigation water salinity, water deficits and excess water treatments. To assess the effects of different irrigation water salinity levels, 6 different salinity levels (EC = 0.25, 1.00, 1.50, 2.00, 4.00 and 6.00 dSm(-1)) with a sodium absorption ratio of less than 3 were used. To assess the effects of water stress, 4 different irrigation levels (75, 100, 125 and 150% of evaporation from Class-A pan) were applied. Two harvests were performed for salt and water stress treatments. Yields of salt treatments varied between 52.8-102.3 g/pot at the first harvest and between 22.3-49.8 g/pot at the second harvest. Yields of water stress treatments varied between 62.8-99.8 g/pot at the first harvest and between 35.3-55 g/pot at the second harvest. Plant heights varied between 32.3-47.3 cm at the first harvest and between 22.3-39.8 cm at the second harvest. The differences between the treatments were found to be significant in both treatments (P<0.05). It was concluded for sufficient drainage and infiltration conditions that lemon balm plants could be irrigated with irrigation waters with salinity levels up to 1.5 dS/m, SAR value of less than 3 and a leaching fraction of 20%. About 1.25 times of evaporation from Class-A pan can be applied to get the greatest yield levels.Öğe Effects of salt and water stress on yield and Vegetative growth parameters of Basil (Ocimum basilicum L.)(Parlar Scientific Publications, 2017) Tas, IsmailThe present study was conducted to assess the response of lemon balm to irrigation water salinity, water deficits and excess water treatments. To assess the effects of different irrigation water salinity levels, 6 different salinity levels (EC = 0.25, 1.00, 1.50, 2.00, 4.00 and 6.00 dSm-1) with a sodium absorption ratio of less than 3 were used. To assess the effects of water stress, 4 different irrigation levels (75, 100, 125 and 150% of evaporation from Class-A pan) were applied. Two harvests were performed for salt and water stress treatments. Yields of salt treatments varied between 52.8-102.3 g/pot at the first harvest and between 22.3-49.8 g/pot at the second harvest. Yields of water stress treatments varied between 62.8-99.8 g/pot at the first harvest and between 35.3-55 g/pot at the second harvest. Plant heights varied between 32.3-47.3 cm at the first harvest and between 22.3-39.8 cm at the second harvest. The differences between the treatments were found to be significant in both treatments (P<0.05). It was concluded for sufficient drainage and infiltration conditions that lemon balm plants could be irrigated with irrigation waters with salinity levels up to 1.5 dS/m, SAR value of less than 3 and a leaching fraction of 20%. About 1.25 times of evaporation from Class-A pan can be applied to get the greatest yield levels. © by PSP.Öğe Fast selection opportunity of salt tolerant guar bean genotypes with GGE biplot method(Taylor & Francis Ltd, 2023) Tas, Ismail; Akcura, Mevlut; Coskun, Yalcin; Tutenocakli, TulayIn this study, 81 guar bean genotypes developed in Turkey were tested in the germination stage under saline conditions, and Genotype-Genotype-Environment (GGE) biplot method was used to identify salt tolerant and sensitive genotypes. In the study, irrigation waters with six different Electrical Conductivity (ECi = 0.5 [control], 6, 8, 10, 12, and 15 dS m(-1)) levels were used. Split-plots experimental design was used in the study, and it was carried out in a laboratory environment with three replications. A dry-weight-based stress tolerance index (STI) was calculated for each ECi level. Salt treatments were considered as environments in GGE biplot analysis conducted for genotype selection based on salt concentrations. Seedling dry weight of some genotypes significantly decreased after 8 dS m(-1) level and such decreases were more remarkable in the other genotypes after 12 dS m(-1) level. It was concluded that ECi = 8 dS m(-1) level could be used for selection of genotypes with moderate salt tolerance and high adaptation capacity and ECi = 12 dS m(-1) level could be used for selection of genotypes with a high salt tolerance and special adaptation capacity. It was also concluded that the GGE biplot method quite facilitated the selection of genotypes tolerant to abiotic stressors, especially to salt stress.Öğe HEAVY METAL, NITROGEN AND PHOSPHORUS ADSORPTION OF COMPACTED LINER MIXTURES(Parlar Scientific Publications (P S P), 2018) Gokalp, Zeki; Tas, Ismail; Uzun, Oguzhan; Kaplan, Sema; Basaran, MustafaNitrate, phosphorus and heavy metals are among the most common pollutants and create potential dangers for groundwater contamination. In this research, a liner design was proposed for waste repository sites, constructed wetland basins and manure management lagoons to prevent groundwater contamination by seepages from the bottom of these facilities. For this purpose, sand-bentonite and pumice-bentonite mixtures with pre-defined grain size range (1.00-0.50 mm) and bentonite content (30%) was used. The mixtures were compacted at optimum moisture content and maximum dry weight and then permeability tests were carried out over compacted mixtures. Various concentrations of nitrate, phosphorus (25, 50, 100, 150 and 200 ppm) and heavy metal (Cd, Ni, Pb, Cr and Cu) solutions (10, 20, 30, 40 and 50 ppm) were used to saturate the permeability test samples. Extracts of permeability tests were used to investigate the adsorption characteristics of proposed mixtures for liner design. With regard to heavy metal adsorption, bentonite had the best performance because it is a clay mineral. Sand and pumice exhibited similar performances in lead and cadmium adsorption, but pumice had much better performance than sand in chrome, copper and nickel adsorption. Although sand-bentonite and pumice-bentonite mixtures exhibited similar performance in nitrate adsorption, again pumice-bentonite mixtures had much better performance than sand-bentonite mixtures in phosphorus adsorption. Current results revealed that pumice with macro-micro pore structure and resultant adsorptive surface characteristics could be used as an alternative of sand in liner design.Öğe RESPONS OF WHEAT SPECIES TO IRRIGATION WATER SALINITY(Serbian Genetics Soc, 2017) Coskun, Yalcin; Tas, IsmailThis study was conducted to investigate the effects of different irrigation water salinity level on chromosomes and shoots of wheat with three different ploidy level (diploid, tetraploid and hexaploid). Greenhouse experiment revealed that irrigation water salinity level had significant effects on shoot dry weight, root dry weight, shoot length and root length (P < 0.05). The effects of ploidy level and cultivar shoot dry weight and root dry weight were also found to be significant (P < 0.05), but the effects on shoot length and root length were not significant (P > 0.05). Negative effects of salinity on shoot and root were started at 8 dS m(-1). Also hexaploid wheat was more tolerant then tetraploid and diploid wheat to salinity. It was not determined that possible effects of irrigation water salinity to structure of chromosomes with current equipment and methods. Cell divisions were normal, but decreasing cell division rates were observed with increasing irrigation water salinity levels.Öğe Spatial distribution and health risk assessment for heavy metals of the soils around coal-fired power plants of northwest Turkey(Taylor & Francis Ltd, 2024) Parlak, Mehmet; Tas, Ismail; Gorgisen, Ceren; Gokalp, ZekiThis study was conducted to determine heavy metal concentrations of the soils around two thermal power plants located in & Ccedil;anakkale province (northwest Turkey) and health hazards of these heavy metals. By using random sampling method, 45 surface soils (0-5 cm depth) were taken from around the thermal power plants and heavy metal analyses were conducted on these samples. Average values of some heavy metals were greater than the normal background levels, and the others were lower than the background levels. While Cd, Cr, Mn, Ni and Zn concentrations were higher than worldwide soils, Co, Cu, and Pb concentrations were lower than worldwide soils. Correlation analysis revealed significant positive correlations (p < 0.05) between 1) Co and Cd, 2) Cr and Cd, 3) Ni and Cd, 4) Pb and Cu, 5) Zn and Mn 6) Zn and Pb and highly significant positive correlations (p < 0.01) between 1) Cu and Cd, 2) Mn and Cd, 3) Zn and Cd, 4) Cr and Co, 5) Cu and Co, 6) Mn and Co, 7) Ni and Co, 8) Cu and Cr, 9) Mn and Cr, 10) Ni and Cr, 11) Ni and Cr, 12) Mn and Cu, 13) Ni and Cu, 14) Zn and Cu. Health risk assessments of heavy metals were made based on both carcinogenic and non-carcinogenic risk index. The total non-carcinogenic risk index is 3.87E-01 for children and 4.67 E-02 for adults and present values were above these limits. Carcinogenic risks of heavy metals in children and adults were determined in the order of Cr > Pb > Ni > Co > Pb. Cr and Pb were found to be higher than the acceptable risk range (10-6-10-4) in children and adults. Since Cr and Pb concentrations exceed the limit values, heavy metal contents of the soils in the study area should be monitored regularly.Öğe The effect of climate change on stream basin hydrometeorological variables: The example of Dim Stream (Turkey)(European Regional Centre Ecohydrology Polish Acad Sciences, 2024) Atilgana, Atilgan; Yuecelb, Ali; Kocieckac, Joanna; Rolbieckid, Roman; Senyigite, Ulai; Tas, Ismail; Markovic, MonikaClimate change is causing serious problems in various economic sectors in particular involving water management. For this reason, it is extremely important to conduct research to identify climate change trends and better understand them. This study was carried out in the Dim Stream basin in the Western Mediterranean region (Turkey), which is particularly vulnerable to climate change. The study used flow data from two flow observation stations (FOS) and meteorological records such as wind speed, average flow, precipitation, temperature, evaporation, radiation, and relative humidity for 1984-2017. These data showed the changes between flow and hydrometeorological variables using linear regression analysis, coefficient of variation, t-test and correlation analysis. It has been determined that there has been a rapid decrease in the average flow of the FOS number 09006 since 1995 and the average flow of the FOS number 09-013 since 1999. Also, it was demonstrated that the average relative humidity (RHave), ave ), average temperature (Tave), ave ), average precipitation (Pave), total precipitation (Pt) and maximum precipitation (P max ) meteorological variables were most affected by climate change in the basin. Furthermore, it was found that the most changes were Qy ave (67.60%), T m i n (48.23%), P max (36.43%), P ave (33.91%), Pt t (33.90%), and RH ave (2.63%) in FOS numbered 09-013. Moreover, it was concluded that climate change variability had developed trends towards a rapid decrease in the flow values at the flow observation stations in Dim Stream. These results show that plans and measures for the efficient and sustainable management of water resources in this region must be implemented immediately.Öğe The Effect of Drip Irrigation and Nitrogen Levels on the Oil and Fatty Acid Composition of Sesame and Its Economic Analysis(Mdpi, 2024) Tas, Ismail; Akcura, Sevim; Kaplan, Mahmut; Jagosz, Barbara; Atilgan, Atilgan; Kociecka, Joanna; Rolbiecki, RomanOne of the oldest oilseed crops is sesame, which is mainly cultivated due to its valuable oleic/linolenic fatty acid ratio. The application of precise irrigation and fertilisation is crucial to ensure the continuity and productivity of sesame production, especially in arid and semi-arid regions. This study aimed to determine the effect of drip irrigation and nitrogen levels on sesame's oil and fatty acid composition. For this purpose, four nitrogen doses (N0: 0 kg ha-1, N30: 30 kg ha-1, N60: 60 kg ha-1 and N90: 90 kg ha-1) and three different irrigation water levels (I50, I75 and I100, which correspond to 50, 75 and 100% evaporation levels from the evaporation of the Class A pan) were applied. The highest oleic acid content (43.06%) was obtained for the I75N90 treatment. In the case of linoleic fatty acid, the greatest value (43.66%) was for I50N0 treatment. The effects of irrigation and nitrogen doses on oleic acid and linoleic acid content were inverse of each other. An increase in applied irrigation water increased the linoleic acid content. However, it caused a decrease in oleic acid content. Increasing the nitrogen dose increased the oleic acid content and caused a decrease in linoleic acid content. Furthermore, this study showed that the I50N60 treatment (50% Epan and a rate of 60 kg N ha-1) is the most effective for achieving high grain and oil yields in sesame cultivation. The results obtained provide practical guidance for farmers in sesame cultivation.
