Servet TEKIN, S. Metin SEZEN, Selçuk ARSLAN, Sedat BOYACI, Mehmet YILDIZ

Water Production Functions of Wheat Irrigated with Saline Water Using Line Source Sprinkler System under the Mediterranean Type Climate

Bu çalışma, yağmur korunaklı serada kışlık buğdayın su-tuz-verim ilişkileri ile bitkinin tuza dayanım düzeyleri ve toprakta tuz dağılımlarının belirlenmesi amacıyla, 2009 ve 2010 yetişme dönemlerinde Adana, Çukurova Üniversitesi Ziraat Fakültesi Tarımsal Yapılar ve Sulama Bölüm’ü deneme arazisinde yağmur korunağında yürütülmüştür. Çalışmada, çizgi kaynaklı yağmurlama sistemi kullanılarak farklı su ve tuz düzeyleri oluşturulmuştur. Sonuçta, farklı nitelikteki sulama sularının buğdayda verimi ve verim bileşenlerini etkilediği saptanmıştır. Sulama suyu tuzluluğu arttıkça bitki su tüketimi ve verim azalmıştır. Uygulanan tuzlu sulama suyu toprakta tuz birikimine neden olduğu ve yüksek derişimdeki tuz toprağın bazı fiziksel özelliklerini etkilemiştir. Sulama suyu tuzluluğunun artmasıyla sulama suyu kullanma randımanının (IWUE) azaldığı, ancak toplam su kullanma randımanının (WUE) yükseldiği belirlenmiştir. Tuzluluk eşik değeri her iki deneme yılı verileri kullanılarak 5.107 dS/m olarak hesaplanmıştır. Sera koşullarında yapılan tuzlu su çalışmalarında verim tepki etmeninin (ky), ortamın iklim özelliklerinden ve toprak tuzluluğundan etkilendiği ve çalışma sonunda yüksek ky değeri (1.46) belirlenmiştir

Anahtar Kelimeler:

Buğday, tuzlu sulama suyu, yağmur korunağı, tek kaynaklı yağmurlama sistemi, verim etmeni

Water Production Functions of Wheat Irrigated with Saline Water Using Line Source Sprinkler System under the Mediterranean Type Climate

An experiment was conducted to determine the effect of water-salinity-yield relations of winter wheat and crop salt tolerance level along with salt distribution in the soil profile during the 2009 and 2010 growing seasons under rain-shelter in the Irrigation and Agricultural Structures Department, Faculty of Agriculture at Çukurova University in Adana. A line source sprinkler irrigation system was used to create different salt and water gradients. The results revealed that different irrigation water with different qualities affected grain yield and yield components. As the salinity level of the irrigation water increased crop water use and grain yield decreased. Saline irrigation water resulted in increased soil salinity in the profile and higher salt concentration in the soil affected some physical properties of the soil. Irrigation water use efficiency (IWUE) increased, however water use efficiency (WUE) decreased as a result of saline irrigation application. Salinity threshold level of 5.107 dS/m was found for winter wheat from two year experimental data. Application of saline water with sprinkler system resulted in yield reduction at relating lower salinity levels and yield response factor (ky) of 1.46 was determined due to weather condition inside rain-shelter and soil salinity

Keywords:

Wheat, saline water, rain-shelter, line source sprinkler system, yield response factor,

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