Su Kültüründe Yetiştirilen Sandra ve Toska Hıyar Çeşitlerinde NO₃/NH₄ ve N₃/Üre Oranlarının Bitki Gelişmesine, Verime ve Meyve Özelliklerine Etkisi

Öz

Bu çalışma değişen oranlarda NO₃⁻/NH₄⁺ ve NO₃⁻/Üre’nin iki hıyar çeşidinde bitki gelişmesine, verime ve meyve özelliklerine etkisini tespit etmek için yürütülmüştür. Sandra ve Toska hıyar (Cucumis sativus L.) çeşitleri su kültüründe 10 hafta yetiştirilmiştir. NO₃⁻/NH₄⁺ ve NO₃⁻/Üre oranları 100/0-50/50 arasında değişmiştir. En iyi gelişme 100/0 NO₃⁻/NH₄⁺, en zayıf gelişme ise 50/50 NO₃⁻/NH₄⁺ uygulamasında olmuştur. Hıyar çeşitleri ile NO₃⁻/NH₄⁺ ve NO₃⁻/Üre uygulamaları arasındaki interaksiyon önemli bulunmamıştır. Nitrat toplam verimi ve meyve sayısını istatistiksel olarak artırmıştır. Nitrat ve 50’den az üre uygulamaları kuru ağırlığı artırmıştır. 50/50 NO₃⁻/NH₄⁺ uygulamasında kuru ağırlık en az olmuş tur. 50/50 ve 75/25 NO₃⁻/Üre uygulamalarında bitkilerde yaprak kenarlarında nekrozlar oluşmuştur. Her iki çeşidin olgun yapraklarında oluşan nekrozlar yaprakların büyüyüp açılmasını etkilememiştir.

Anahtar Kelimeler

• Su Kültürü
• Sandra
• Toska
• Hıyar
• NO₃/NH₄
• N₃/Üre
• Gelişmesine
• Verim

The Influence of NO₃/NH₄ and NO₃/Urea Ratios on the Growth, Yield and Fruit Characteristics of Cucumber Plants cvs. Sandra and Toska Grown in Solution Culture

Abstract

This study was undertaken to determine the influence of varying rations of NO₃⁻/NH₄⁺ and NO₃⁻/Urea on growth, yield and fruit characteristics of 2 cucumber cultivars. Cucumber (Cucumis sativus L.) Cvs. Sandra and Toska were grown for 10 weeks in solution culture. The ratio of NO₃⁻ to NH₄⁺ and of NO₃⁻ to urea in the nutrient solution varied from 100/0 to 50/50. To poorest growth occurred when NO₃⁻/NH₄⁺ ratio was 50/50 in the nutrient solution. Interaction of cucumber plants to NO₃⁻/NH₄⁺ and NO₃⁻/Urea rations was not significant. Nitrate increased significantly total yield and number of fruits. Nitrate and less than 50% urea, increased the dry weights. The dry weights were lowest for NO₃⁻/NH₄⁺ treatment of 50/50. Necrosis developed on margins of the leaves on all plants with 50/50 and 75/25 NO₃⁻/Urea treatments. The disorder occurred in the mature leaves of both cultivars but it did not affect expanding leaves.

Keywords

• Aquaculture
• Sandra
• Toska
• Cucumber
• NO₃/NH₄
• N₃/Urea
• Growth
• Yield

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