Bu araştırma katı solucan ve tavuk gübrelerinin kıvırcık salatada verim, bazı kalite özellikleri ve bitki besin elementi içeriklerine etkilerini belirlemek amacıyla yürütülmüştür. Cam sera koşullarında yapılan araştırmada parsel büyüklüğü 1.2 m 2 olup, her parselde 10 bitkiye yer verilmiş ve bitkisel materyal olarak Caipira kıvırcık marul (Lactuca sativa L. var crispa) çeşidi kullanılmıştır. Denemede katı solucan gübresi (SG:80 kg da-1), katı tavuk gübresi (TG:250 kg da-1), kimyasal gübreler (KG:12.5 N-4 P2O5-11 K2O kg da-1), SG (80 kg da-1) + KG (12.5 N-4 P2O5-11 K2O kg da-1), TG (250 kg da-1) + KG (12.5 N-4 P2O5-11 K2O kg da-1) ve Kontrol (K) uygulamaları yer almıştır. Hasat edilen bitkilerde kök boğazı çapı (mm), baş boyu (cm), yaprak sayısı (adet bitki-1), yaprak rengi (L, Hue ve Chroma), klorofil miktarı, toplam ve pazarlanabilir verim (kg da-1), ortalama baş ağırlığı (g bitki-1) ve makro bitki besin elementi içerikleri incelenmiştir. Araştırmadan elde edilen sonuçlara göre en yüksek toplam ve pazarlanabilir verim ile ortalama baş ağırlıkları TG + KG uygulamasından elde edilmiştir. En yüksek kök boğazı çapı SG + KG uygulamasında belirlenirken, en yüksek baş uzunluğu TG'de tespit edilmiştir. Klorofil miktarı bakımından uygulamalar arasında farklılıklar oluşmazken, renk açısından en yüksek L değeri SG, Hue değeri, KG uygulamasında ve en yüksek Chroma değeri de SG ve K uygulamalarında saptanmıştır. Analiz edilen makro elementler açısından en yüksek azot TG + KG, SG + KG ve KG uygulamalarında, en yüksek fosfor Kontrol uygulamasında, en yüksek potasyum, kalsiyum ve magnezyum değerleri ise TG uygulamalarında tespit edilmiştir.

Salt accumulation in the root zone at the end of the irrigation season compared to the beginning of the irrigation season was investigated for curly lettuce plants in this study. The study was conducted in a spring-roofed plasticcovered greenhouse in a spring growing season in 2018 and the Campania curly lettuce (Lactuca sativa var. crispa) variety was used as the plant material. The conventional drip irrigation (GS125, GS100, GS75 and GS50) and partial root drying technique (AYIS125, AYIS100, AYIS75 and AYIS50) applications were investigated in the study. In the alternate partial root drying technique (APRD) application, the wet and dry parts were replaced in the following irrigations, respectively. In other words, in APRD application, while one half of the plant root area was wetted relatively during irrigation, the remaining half was left relatively dry and the parts left wet and dry in the next irrigation were replaced. In order to determine the salinity accumulation in the plant root zone, soil samples were taken from 0-10, 10-20 and 20-30 cm depths to represent the soil in three replicates at the beginning of the irrigation season. Similarly, at the end of the irrigation season, soil samples were taken from the plant root area in three replicates under each irrigation application. Mud strainers were obtained from soil samples using the traditional method in the laboratory and salinity measurements were made. While the lowest salinity value was measured as 0.49 dS m -1 in GS100 application, the highest salinity value was recorded as 1.40 dS m -1 in GS125 application. In general, the highest salinity increase at the end of the season was calculated in GS125 irrigation application as 48% for the first layer (0-10 cm), 34% for the second layer (10-20 cm) and 45% for the third layer (20-30 cm). These increase rates are values that should be taken into account. As a result, it is recommended to remove the salt accumulation in the soil by an effective washing process through a good drainage system end of the growing season for a sustainable irrigated agriculture.

This research was carried out in two separate periods (spring and autumn) in 2018 to reveal the lettuce response of yield, some quality, and plant nutrient content under different water stress conditions. In the study, the effects of different irrigation levels applied with traditional deficit irrigation (TI) and partial rootzone drying (PRD) techniques on lettuce growing were investigated. Lettuce (Lactuca sativa var. crispa cv. ‘Campania’) was used as plant material. There were traditional farmers’ method of irrigation (TF), 125% traditional irrigation (TI-125), 100% traditional irrigation (TI-100), 75% traditional irrigation (TI-75), 50% traditional irrigation (TI-50), 125% partial root-zone drying technique (PRD-125), 100% partial root-zone drying technique (PRD-100), 75% partial root-zone drying technique (PRD-75), 50% partial root-zone drying (PRD-50) technique treatments. According to the results of the research, it was determined that different water stress applications were effective on the criteria examined in lettuce. The highest total and marketable yield values were obtained from the TF application, the second-highest values from the TI-125 application, and the lowest yield from the PRD-50 in the autumn period. In the spring season, the lowest yield was obtained from TI-50 and PRD-50 applications. Based on the treatments, the yield values were decreased and changes were experienced with the increase of the water stress in other examined criteria.