The Effects of Shading on Some Agronomical Traits of The Tea Plants (Camellia sinensis (L.) Kuntze)

Öz

This research was conducted to determine the effect of applying shading on some agronomical traits of the tea plant (Camellia sinensis (L.) Kuntze) in 2024. The study was carried out during the first shoot period of tea and shading nets were used to prevent the passage of sunlight at different rates (Control, 35%, 55% and 75%). In the study, shoot length (cm), number of leaves per shoot (unit), leaf length (cm), leaf width (cm), leaf color, fresh leaf yield (g-1 m2-1), dry matter content (%), total polyphenol (%), and caffeine rate (%) were examined in tea plants. As a result of the study, it was determined that the shoot length and the dry matter rate were not affected by shading; however, other examined traits were affected statistically and significantly (P<0.01) depending on the shading rate. The highest values in terms of leaf length, leaf width and leaf color were obtained in the control and 35% shading rates, while the highest number of leaves on the shoot was obtained in the 75% shading rate. As the shading rate increased, the number of leaves per shoot also increased, while the fresh leaf yield tended to decrease. At 75% shading rate, total polyphenol and caffeine levels were at the highest level, and the decreasing the shading rate led to a decrease in the values belonging to these quality elements.

Anahtar Kelimeler

• Camellia sinensis
• shading
• quality
• leaf

Gölgelemenin Çay (Camellia sinensis (L.) Kuntze) Bitkisinin Bazı Agronomik Özellikleri Üzerindeki Etkileri

Öz

Bu araştırma, uygulanan gölgelemenin çay bitkisinin (Camellia sinensis (L.) Kuntze) bazı tarımsal özellikleri üzerine etkisini belirlemek amacıyla 2024 yılında yürütülmüştür. Çalışma, çayın ilk sürgün döneminde gerçekleştirilmiş ve farklı oranlarda (Kontrol, %35, %55 ve %75) güneş ışığının geçişini engellemek için gölgeleme ağları kullanılmıştır. Çalışmada çay bitkilerinde sürgün uzunluğu (cm), sürgün başına yaprak sayısı (adet), yaprak uzunluğu (cm), yaprak genişliği (cm), yaprak rengi, taze yaprak verimi (g-1 m2-1) ve kuru madde içeriği (%), toplam polifenol (%) ve kafein oranı (%) incelenmiştir. Çalışma sonucunda sürgün uzunluğu ve kuru madde oranının gölgelemeden etkilenmediği; ancak incelenen diğer özelliklerin gölgeleme oranına bağlı olarak istatistiksel olarak önemli (P<0,01) düzeyde etkilendiği belirlenmiştir. Yaprak uzunluğu, yaprak genişliği ve yaprak rengi açısından en yüksek değerler kontrol ve %35 gölgeleme oranlarında elde edilirken, sürgündeki en yüksek yaprak sayısı %75 gölgeleme oranında elde edilmiştir. Gölgeleme oranı arttıkça, sürgün başına düşen yaprak sayısı artarken, taze yaprak verimi azalma eğilimi göstermiştir. %75 gölgeleme oranında, toplam polifenol ve kafein seviyeleri en yüksek seviyede gerçekleşmiş olup, gölgeleme oranının azalması bu kalite unsurlarına ait değerlerin azalmasına yol açmıştır.

Anahtar Kelimeler

• Camellia sinensis
• gölgeleme
• kalite
• yaprak

Kaynakça

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