Ali ÜNLÜKARA, Engin YURTSEVEN, İsa TELCİ, Gülüzar Duygu SEMİZ, L. Donald SUAREZ

Salinity impact on yield, water use, mineral and essential oil content of fennel (Foeniculum vulgare Mill.)

Bu çalışmada tuzluluğun rezene (Foeniculum vulgare Mill.) bitkisinde su kullanımı, bitki boyu, yeşil aksam ve tohum verimi, biyokütle üretimi, mineral madde birikimi ve uçucu yağ içeriği üzerine etkisi sera koşullarında araştırılmıştır. Deneme tam tesadüfi faktöriyel deneme deseninde beş tekrarlı olarak kurulmuştur. Tuzlu sular (0.25, 1, 2, 4, 6, 8, 10 ve 12 dSm-1) NaCl ve CaCl2 tuzlarını kullanarak ve SAR değerini 1in altında tutacak şekilde hazırlanmıştır. Tuz seviyesindeki artışa bağlı olarak su tüketimi, bitki boyu, yeşil aksam verimi, biyokütle üretimi, tohum verimi, 1000 dane ağırlığı ve yaprakta magnezyum içeriği bakımından azalma meydana gelmiştir. Çalışma sonucunda, rezene bitkisinin (Foeniculum vulgare Mill.) %4.5 eğimle (artan her bir birim EC değeri için verim kaybı) eşik tuzluluk değeri (verimin düşmeye başladığı tuzluluk düzeyi) 2.64 dSm-1 bulunmuştur. Bu sonuçlar rezene bitkisinin tuzluluğa orta derecede hassas olduğunu göstermektedir.

Tuzluluğun rezene bitkisinin (Foeniculum vulgare Mill.) verim, su kullanımı, mineral ve uçucu yağ içeriğine etkisi

The experimental study was carried out to determine the effects of salinity on water consumption, plant height, fresh and seed yields, biomass production, ion accumulation and essential oil content of fennel (Foeniculum vulgare Mill.) under greenhouse conditions. The experiment was conducted with a fully randomized factorial design with five replications. Saline waters (0.25, 1, 2, 4, 6, 8, 10 and 12 dSm-1) were composed using NaCl and CaCl2 salts keeping SAR value under than 1. Increasing salinity levels led to a decrease in water consumption, plant height, fresh yield, biomass production, seed yield, 1000-grain (seed) yield and Mg accumulations in leaves. We calculated a threshold soil salinity for fennel (Foeniculum vulgare Mill.) of 2.64 dSm-1 (salinity at which yield starts to decrease) with slope of 4.5% (yield decline per unit increase in EC). These results suggest that fennel is moderately sensitive to salinity.

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