Farklı Renkte Örtü Sistemlerinin 'Galaxy Gala' Elma Çeşidinde Meyve Kalite ve Fotosentetik Parametreler Üzerine Etkileri

Son yıllarda küresel ısınmanın etkileri ile güneş ışınım değerleri artış göstermektedir. Bu artışa paralelolarak farklı ılıman iklim meyve türlerinde kalite parametrelerinin korunması için ek önlem alınmasıgereksinimi ortaya çıkmaktadır. Bu çalışmada 'Galaxy Gala' elma çeşidinde siyah, beyaz, kırmızırenkli net örtü sistemlerinin meyve kalite ve fotosentetik parametreleri üzerine etkileri incelenmiştir.Derim öncesi ağaçlarda yaprak sıcaklığı (°C) ve fotosentetik aktiviteler (fotosentez hızı (PN), stomaliletkenlik (gS), transpirasyon (E), yaprak su tüketüm etkinliği (WUE), klorofil miktarı (SPAD) vequantum verimi (PSII)) üzerine etkileri incelenirken, derim sonrasında meyve eti sertliği (kg), SudaÇözünebilir Kuru Madde miktarı (%), titre edilebilir asit miktarı (%), nişasta değişimleri ve meyvekabuk rengi (oh) ölçülmüştür. Elde edilen bulgular ışığında farklı renkte net örtü sistemlerininsıcaklığı azaltarak dolayısı ile gölgeleme ve meyve kalite fotosentetik parametreleri üzerine pozitifetkilerinin olduğu belirlenmiştir. Bu etkiler net uygulamaları ile ilişkilendirilmiştir. Çalışmasonucunda siyah netin sıcaklığı en çok azaltan (10.3oC) örtü olduğu, bunun yanısıra güneş yanığınıbüyük oranda önlediği saptanmıştır. Renklenmeye etkisi bakımından en iyi sonuç beyaz örtüden(50.75oh) elde edilmiştir

Effects of Different Colored Net Cover on 'Galaxy Gala' Apple Fruit Quality and Photosentetik Parameters

Solar radiation has been increased with global warming recently. Temperate zone fruit productionstarted to need some more precautions because of the increased solar radiation. The effects of black,white (pearl) and red color nets on fruit quality and photosynthetic parameters of 'Galaxy Gala' applecultivar were exemined in this research. The leaf temperature (oC) and photosynthetic parameters wasmeasured at preharvest period whereas fruit flesh firmness, total soluble solids (TSS), titratableacidity (TA) starch scale and fruit peel color (h) determined at harvest. End of the experiment resultsshowed that the temperature was reduced by using different colored net. AlsoIt was determined thatpositive effects on fruit quality and photosynthetic parameters (photosynthetic rate (PN), stomalconductivity (gS), leaf transpiration rate (E), leaf water use efficiency (WUE), SPAD, quantum yield(PSII), and leaf temperature) which also related with net aplications. The experiment results indicatedthat black net gave the best result reducing the tempereature (10.3oC) so depending on these results toprevent sunburn is defined that 86%. In terms of fruit peel coloration impact, white net showed thatbest result with 50.75oh

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