1912

Marul (Lactuca Sativa L.) Çeşitlerinin Tohum Verimi ve Vejetatif Gelişimi Uzerine Fosfor Düzeylerinin Etkisi

Bu çalışma marul (Lactuca sativa L.)'da büyüme ve tohum veriminde farklı fosfor düzeylerinin etkisiniaraştırmak amacıyla yapılmıştır. Iki farklı marul çeşidi, Grand Rapids ve Romaine sırasıyla 60 kg/ha ve 80 kg/haolmak üzere iki farklı fosforlu gübre düzeyinde tesadüf blokları (RCBD) deneme deseni kullanarak testedilmiştir. Denemelerin fosfor olrnaksızm tohum parametreleri ile duyusal olarak değerlendirmesinin yanı sıra,tohumun gevrekliği ve rengi her 10 günde bir incelenmiştir. Fosforlu gübrenin artışmın her iki manıl çeşidininverimi, yer örtüsü ve raf ömrü üzerinde olumlu bir etkiye sahip olduğu görülmüştür. Bununla birlikte, Romaineçeşidine kıyasla Grand Rapids çeşidinin tohum gelişiminde faz geçişi olması için yeterli ölçüde soğuğa maruzkalmamasına rağmen, Grand Rapids'in verim bakımmdan Romaine'den önemli ölçüde daha üstün birperformans gösterdiği bildirilmiştir. Test edilen iki marul çeşidinin daha iyi bir verim ve tohum gelişimigöstermelerini etkileyecek olan bileşenlerin işlevlerinin çözümlenmesi için, moleküler düzeyde daha fazlaaraştırma yapılması önerilmektedir.

Impact of Phosphorus Levels on Vegetative Growth and Seed Yield of Lettuce (Lactuca sativa L.) Cultivars

The study was conducted to investigate the effects of different phosphorous levels on the growth and seed yield of the lettuce (Lactuca sativa L.). Two lettuce varieties namely Grand Rapids and Romaine were tested on various phosphorus fertilizer levels i.e. 60 kg and 80 kg per hectare using Randomized Complete Block under factorial Design (RCBD). The treatment without phosphorus was seed parameters as well as sensory evaluation including crispiness and color were examined after interval of each 10 days. We report that the increase in the phosphorus fertilizer has positive effects on yield, ground cover and shelf life of both varieties; however Grand Rapids significantly showed superior performance than that of Romaine. Furthermore, Romaine developed seeds not observed in case of Grand Rapids cultivar seemingly due to insufficient chilling hours required for phase transition. Further investigations are suggested at molecular level to decipher the components involved in better yield and seed development in both varieties tested.

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