The late spring frost hardiness of some apple varieties at various stages of flower buds

Bu çalışmada, meyve bahçesinde 17 Nisan 2004 sabahı 3:00-8:00 saatleri arasında meydana gelen ve sıcaklığın -4 ile -6 oC'e düştüğü dondan sonra 7 elma (Malus x domestica Borkh.) çeşidinin açılmamış tomurcuk safhasından çiçek safhasına kadar farklı gelişme safhalarındaki çiçek tomurcuklarında dişi organların canlılık oranları belirlenmiştir. Dondan sonra dişi organlardaki canlılık oranları, açılmamış tomurcuklarda % 36.7 ve 96.5, pembe ucun göründüğü tomurcuklarda % 6.2 ve 86. 0, pembe tomurcuklarda ise % 0.2 ve 52.0 arasında değişmiştir. Açılmamış tomurcuk safhasından çiçek safhasına kadar farklı gelişme safhalarındaki çiçek tomurcuklarında 'Starkspur Golden Delicious' (% 18.0), 'Granny Smith' (% 33.0) ve 'Canada Reinette' (% 36.7) dondan sora en az zarar gören çeşitler olmuştur.

Bazı elma çeşitlerinin çiçek tomurcuklarının farklı safhalarında ilkbahar geç donuna dayanıklılığı

In this study, survival rates of pistils of seven apple (Malus x domestica Borkh.) varieties at various stages from tight cluster to full bloom on trees were determined after frost that occurred on the morning at 3:00-8:00 of April 17, 2004 when the temperature dropped to -4 to -6 oC in the orchard. The survival rates of pistils of varieties ranged between 36.7 and 96.5% at tight cluster, 6.2 and 86.0 % at first pink and, 0.2 and 52.0 % at full pink stages after frost injury. 'Starkspur Golden Delicious' (18.0 %), 'Granny Smith' (33.0 %) and 'Canada Reinette' (36.7 %) were the least damaged apple varieties at various flower buds stages from tight cluster to first bloom on trees after frost.

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