Abstract Soils and irrigation waters contain multiple types of salt, each of which may exert different effects on plant cultivation. In this study, it was aimed to investigate the effects of different salt sources (CaCl2, Ca(NO3)2, MgCl2, MgSO4, NaCl and Na2SO4) in irrigation water with different salinity levels (0.7, 1.5, 2.5 and 4.0 dS/m) on growth, yield and quality parameters of stevia in addition to soil, and drainage water. It was found that seasonal evapotranspiration, plant growth, yield and quality parameters of stevia plant ​​generally showed less variation among irrigation water salinity levels for salt sources containing SO4 than those containing Cl and NO3. Water-yield response factors of stevia plant were determined as 1.58, 1.37, 1.45, 2.04, 1.68 and 2.15 for CaCl2, Ca(NO3)2, MgCl2, MgSO4, NaCl and Na2SO4 salts, respectively. These values indicate that stevia plant is very sensitive to water stress originating from osmotic effect of each salt source. The order of salt sources for threshold salinity values of dry herbaceous yields of stevia plant were determined as Ca(NO3)2 > Na2SO4 > MgSO4 > NaCl > CaCl2 > MgCl2. Similarly, the order salt sources for slope values indicating the relative yield decrease for per unit increase in salinity after the threshold values were obtained as Na2SO4

中文翻译：

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盐源和灌溉水盐度对甜叶菊生长、产量和品质参数的影响

摘要 土壤和灌溉水中含有多种盐分，每种盐分对植物栽培产生的影响不同。本研究旨在研究不同盐源（CaCl2、Ca(NO3)2、MgCl2、MgSO4、NaCl 和 Na2SO4）对不同盐度（0.7、1.5、2.5 和 4.0 dS/m）灌溉水中的影响。 ) 除了土壤和排水之外，甜叶菊的生长、产量和质量参数。研究发现，甜叶菊植物的季节性蒸散量、植物生长、产量和质量参数在灌溉水盐度水平之间的变化对于含 SO4 的盐源通常比含 Cl 和 NO3 的盐源更小。对于CaCl2、Ca(NO3)2、MgCl2、MgSO4、NaCl和Na2SO4盐，甜叶菊植物的产水响应因子分别被确定为1.58、1.37、1.45、2.04、1.68和2.15。这些值表明甜菊植物对源自每种盐源的渗透效应的水分胁迫非常敏感。甜菊植物干草本产量阈值盐度值的盐源顺序确定为 Ca(NO3)2 > Na2SO4 > MgSO4 > NaCl > CaCl2 > MgCl2。类似地，斜率值的顺序盐源表明在获得阈值后每单位盐度增加的相对产量下降为 Na2SO4