Effects of Different Crop-load and Ethephon Treatments on Yield, Quality and Biochemical Parameters of Erciş Grape Cultivar

Abstract

This study was conducted to investigate the effects of different crop-load and ethephon treatments on yield, quality and biochemical characteristics of Erciş grape cultivar in 2017. Experimental vines were grown on their own roots and trained in gobble style. Following the fruit-set, cluster thinning was performed as to have two different fruit loads (20 and 30 cluster/vine). Ethephon (CEPA 2-Chloroethylphosphonic acid) was sprayed externally only to the clusters in 4 different doses (0-100-500-1000 ppm) twice 7th and 14th days after veraison. Crop loads and ethephon treatments had significant effects on vine yield, cluster width, 100-berry weight, berry length and width, L* and b* values, syringic and p-coumaric acid contents of Erciş grapes. In both crop loads, as compared to the control, ethephon doses generally decreased vine yield, cluster weight, length and width, berry length, width and 100-berry weight, tartaric and malic acid contents, pH and total acidity and increased soluble solid contents.

Keywords

• Veraison
• Ethephon
• Phenolic compound
• Organic acid

Erciş Üzüm Çeşidinde Farklı Ürün Yükü ve Etefon Dozlarının Verim ve Kalite ile Bazı Biyokimyasal Özellikler Üzerine Etkileri

Öz

Bu araştırma, Erciş üzüm çeşidinde farklı ürün yükü ve etefon dozlarının verim ve kalite ile bazı biyokimyasal özellikler üzerine olan etkilerini belirlemek amacıyla 2017 yılında yürütülmüştür. Kendi kökleri üzerinde goble terbiye sistemine sahip asmalara tane tutumunun ardından salkım seyreltme yoluyla iki farklı ürün yükü (20 ve 30 salkım/asma) uygulanmıştır. Ben düşme tarihinden sonraki 7. ve 14. günlerde iki kez dört farklı dozda (0-100-500-1000 ppm) sadece salkımlara püskürtme yoluyla etefon uygulaması yapılmıştır. Erciş üzüm çeşidinde ürün yükü ve etefon uygulamalarının asma verimi, salkım eni, 100 tane ağırlığı, tane boyu, tane eni, L* ve b* değeri ile sirinjik ve p-kumarik asit miktarları üzerine olan etkileri istatistiksel olarak önemli bulunmuştur. Her iki ürün yükünde de etefon dozlarının kontrole göre asma verimi, salkım ağırlığı, salkım boyu, salkım eni, tane boyu, tane eni, 100 tane ağırlığı, tartarik asit, malik asit, pH ve toplam asitlikte genel olarak azalmaya, suda çözünebilir kuru madde miktarında ise artışa neden olduğu tespit edilmiştir.

Anahtar Kelimeler

• Ethephon
• Fenolik bileşik
• Organik asit
• ben düşme

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