Green long pepper growth under different saline and water regime conditions and usability of water consumption in plant salt tolerance

Bitki su tüketiminin artan tuzluluğun etkisiyle azalmasından dolayı, bitkilerin tuzluluğa karşı toleranslarınınbelirlenmesinde, toprağın saturasyon çamuru ekstraktı elektriksel iletkenliği (ECe) ile bitki su tüketimi (ET) birlikte değerlendirilmelidir. Kontrollü şartlarda serada yürütülen bu çalışmada bitkilerin tuzluluğa karşı tepkilerinindeğerlendirilmesinde toprak tuzluluğu ve bitki su tüketimi birlikte dikkate alınmıştır. Buna ilaveten sivri biberin(Capsicum annuum L. Demre ) farklı tuz ve su rejimi şartları altında verim ve gelişmesi incelenmiştir. Bu amaçla, sivribiber altı düzeyde sulama suyu tuzluluğuna (S 1= 0.65; S 2= 2.0; S 3= 3.0; S 4= 4.0; S 5= 5.0 ve S 6= 7.0 dS m -1) ve dört suuygulama oranına (tüketilen suyun IR1 = 1.43; IR2= 1.0; IR3 = 0.75 ve IR4= 0.50 katı) maruz bırakılmıştır. Tuzluluk stresiiçin verim tepki faktörü (Ky) 1.56 ve su stresi için 1.66 olarak belirlenmiştir. Birim toprak tuzluluğu artışı için 1.20 dS m-1eşik değerinden sonra nispi meyve verimi doğrusal şekilde azalırken (% 7.03), su tüketimi üstel şekilde azalmıştır (ET=0.83×ECe-0.17 ). Nispi verim, nispi su tüketimi ve toprak tuzluluğu arasında çok kuvvetli üç boyutlu ilişki bulunmuştur(R2= 0.94). Bitkilerin tuzluluğa karşı streslerinin belirlenmesinde ikinci bir faktör olarak su tüketiminin kullanılması,farklı iklim şartlarının etkisinin yansıtılmasında yararlı olabilecektir.

Farklı tuzluluk ve sulama rejimi şartlarında sivri biber gelişimi ve bitki tuzluluk toleransında su tüketiminin kullanılabilirliği

Both electrical conductivity of soil saturation paste extract (ECe) and plant water consumption (ET) should be consideredfor assessing crop yield tolerances to salinity since ET decreases by increased salinity effects. In this study, conductedin a greenhouse under controlled conditions, it was afforded to use soil salinity and water consumption for the purposeof assessing plant responses to salinity. Additionally, growth and yield of green long pepper (Capsicum annuum L.Demre ) under different saline and water regime conditions were examined. For these purposes, the green long pepperwere exposed to six water salinity levels (S 1 = 0.65; S 2= 2.0; S 3 = 3.0; S 4= 4.0; S 5= 5.0 and S 6= 7.0 dS m -1 ) and four waterapplication rates (IR1 = 1.43; IR2= 1.0; IR3 = 0.75 and IR4= 0.50 times of depleted water). The yield response factor(Ky), is 1.56 for salinity stress and 1.66 for water stress. Water consumption of the plant exponentially decreased (ET=0.83×ECe-0.17 ) whereas relative fruit yield decreased linearly (7.03%) for unit increase in soil salinity after a thresholdvalue of 1.20 dS m -1 . A stronger three-dimensional relation was found among relative yield, relative water consumptionand soil salinity (R2= 0.94). Using water consumption as a second factor in evaluation of plant response to salinity maybe useful for refecting effects of different climatic conditions.

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