This experiment was conducted to determine the effects of different water stress levels on biomass yield, plant height, number of stalks per meter, single stalk weight, yield reduction ratios and irrigation water use efficiency (IWUE) values of switchgrass (Panicum virgatum L.) varieties under Central Anatolia conditions. The study was conducted for two years (2016 -2017) in the Randomized Complete Block Design arranged in split plots with three replications under Konya ecological conditions. Six switchgrass varieties (Shelter, Alamo, Cave in rock, Shawnee, Kanlow and Trailblazer) and five different irrigation treatments (water stress levels: S1: Full irrigation; S2: 75% of full irrigation; S3: 50% of full irrigation; S4: 25% of full irrigation and S5: Rain-fed without irrigation) were used in this experiment. Kanlow, Alamo and Trailblazer varieties had greater biomass yields than the other varieties in all water stress treatments. Under different water stress treatments, dry biomass yields varied between 48300 kg ha-1 (S5-Cave in rock) and 25120 kg ha-1 (S1-Kanlow); plant heights varied between 70 cm (S5) and 180 cm (S1); number of stalks per meter varied between 221 (S5) and 356 (S1); single stalk weights varied between 0.56 g (S5) and 2.25 g (S1). IWUE was calculated as 5.7 kg m-3 for the first harvest and as 2.1 kg m-3 for the second harvest. Considering the biomass yields from single harvest of rain-fed treatments (S5) and two harvests of the other irrigation treatments (S1-S4), IWUE values and water deficits of the region, it was concluded that single harvest was more suitable for switchgrass plants grown under ecological conditions.

This study was conducted to determine water-yield relations of drip-irrigated maize that was grown in Central Anatolia Region of Turkey with a dominant arid and semi-arid climate. Four different irrigation treatments were applied to experimental plots in 7-day intervals. Irrigation treatments were laid out based on 7-day cumulative evaporation from class-A pan (I120 -120%, I100 -100%, I80 -80% and I60 -60% of pan evaporation). Applied irrigation water quantities varied between 431-676 mm in 2009 and between 453-726 mm in 2010. The greatest seasonal water consumption (821 mm) was observed in I120 treatment of 2010 and the lowest (590.1 mm) in I60 treatment of 2009. The greatest kernel yield per hectare (15773 kg ha -1 ) was obtained from I120 treatment of 2010 and the lowest (8986 kg ha -1 ) from I60 treatment of 2009. Water use efficiency (WUE) values varied between 1.45-1.99 kg m -3 and irrigation water use efficiency (IWUE) values varied between 1.84-2.39 kg m -3 . Yieldresponse factor (ky) of maize was calculated as 1.47 in 2009 and 1.36, in 2010. While I100 was recommended as the ideal irrigation program, I80 treatments could also be used to improve water use efficiencies in places where full irrigation is not possible.

No abstract

This study was conducted with 32 bread wheat genotypes in rainfed and irrigated conditions during 2012 to 2015 in central location of Bahri Dağdaş International Agricultural Research Institute. The aim was to determine grain yield, some quality traits (protein, hardness, Zeleny sedimentation) and farinograph parameters (dough development time (DDT), water absorption capacity (WAC), dough stability (STAB), softening value (DS10 and DS12), Farinograph quality number (FQN)) in irrigated and rainfed conditions. Mean values of three years in rainfed conditions were as grain yield 344.23 kg da-1 , protein 14.76%,

Bu araştırma, Konya ili açık tarla şartlarında Cuore (Lactuva Sativa L. var. longifolia) marul çeşidinin su-verim fonksiyonlarını belirlemek amacıyla, Toprak Su ve Çölleşme ile Mücadele Araştırma Enstitüsü deneme arazisinde 2017-2018 yılı yetiştirme sezonunda yürütülmüştür. Çalışmada 4 gün sulama aralığında dört farklı sulama düzeyi uygulanmıştır. Sulama düzeyleri, A sınıfı buharlaşma kabından oluşan yığışımlı buharlaşma değerinin % 60'ı (I 60), % 80'i (I 80), % 100'ü (I 100) ve % 120'si (I 120) alınarak oluşturulmuştur. Deneme tesadüf blokları deneme deseninde üç tekerrürlü olarak yürütülmüştür. Araştırma sonuçlarına göre, mevsimlik su tüketimi en yüksek 441.9 mm ile I 120 konusunda, en düşük 317.8 mm ile I 60 konusunda gerçekleşmiştir. En yüksek ortalama pazarlanabilir baş ağırlığı 865.85 g ile I 120 konusunda, en düşük ortalama pazarlanabilir baş ağırlığı ise 475.68 g ile I 60 konusunda bulunmuştur. Sulama suyu ve su kullanım randımanları, konulara bağlı olarak, sırasıyla 14.6-18.3 kg m-3 ve 12.5-17.0 kg m-3 arasında değişmiştir. Marul verim tepki etmeni (ky) ise 1.38 olarak bulunmuştur. A sınıfı buharlaşma kabından meydana gelen buharlaşma değerinin % 100'ünün sulama suyu olarak verildiği konu ideal sulama programı olarak önerilmiştir. Anahtar Kelimeler: A sınıfı buharlaşma kabı, damla sulama yöntemi, konya, marul bitkisi, verim tepki etmeni ** Yüksek Lisans tezinden türetilmiştir.