COMPARISON OF SOME PROMISING TURKISH AND FOREIGN WALNUT CULTIVARS

The present study of the behavior of 13 walnut cultivars grafted onto seedling rootstocks of Juglans regia L. was carried out under the ecological conditions at Niksar, located at latitude 40035’50.85”N, longitude of 36056’37.63”E, and 426 m above sea level.
The orchard was established in 2008 on 7×7 m spacing.
In this study, all the Turkish walnut cultivars were earlier leafing than the foreign walnut cultivars.
The latest leafing cultivars were ‘Fernor’, ‘Fernette’ and ‘Chandler’. Cultivars ‘Maraş -12’, ‘Maraş -18’, ‘Şebin’ and ‘Şen 2’, exhibited freeze damage of 9 to 33%. The cultivars with the earliest leaf drop were ‘Fernette’ and ‘Fernor’. The cultivars with the latest leaf drop were ‘Chandler’, ‘Midland’ and ‘Pedro’. Average nut diameter across the sutures varied from 35.24 mm (‘Fernor’) to 38.47 mm (‘Fernette’), nut height from 33.73 mm (‘Fernor’) to 36.86 mm (‘Fernette’), and nut length from 60.62 mm (‘Fernor’) to 46.82 mm (‘Midland’). Nut weights averaged from 12.79 g (‘Fernor’) to 15.35 g (‘Midland’), kernel weight from 5.80 g (‘Fernor’) to 7.22 g (‘Fernette’). Kernel percentage varied from 42.85% (Pedro) to 47.33% (‘Fernette’) and shell thickness from 1.61 mm (‘Fernor’) to 1.73 mm (‘Pedro’). The average oil content ranged between 59.96% (‘Midland’) and 73.46% (‘Fernor’), protein content between 15.33% (‘Chandler’) and 19.38% (‘Fernor’), and ash content was between 1.67% (‘Pedro’) and 1.91% (‘Chandler’).

VII International Walnut Symposium

Y. Akça, B. Ünal, M. Çelik, Y. Okay

Juglans regia, late leafing, nut quality

https://doi.org/10.17660/ActaHortic.2014.1050.17