Evaluation of the French Walnut Cultivar Fernette and Possibilities of Growing in Bulgaria | ОЦЕНКА НА ФРЕНСКИЯ ОРЕХОВ СОРТ ФЕРНЕТ И ВЪЗМОЖНОСТИ ЗА ОТГЛЕЖДАНЕТО МУ В БЪЛГАРИЯ
2012
Gandev, S., Fruit Growing Institute, Plovdiv (Bulgaria) | Arnaudov, V., Fruit Growing Institute, Plovdiv (Bulgaria) | Perifanova- Nemska, M., University of Food Technology, Plovdiv (Bulgaria) | Petrova-Dimova, M., Agricultural University, Plovdiv (Bulgaria)
With the accession of Bulgaria to the European Union, some perspective European walnut cultivars have been introduced in the country with the aim of updating and improving the varietal range. The aim of the present study was to make an agrobiological evaluation of the French walnut cultivar Fernette and to assess the possibilities of growing it in the country. The investigation was carried out in the period 2006 – 2010 at the Fruit-Growing Institute – Plovdiv. The biological characteristics and the economic properties of the introduced French cultivar Fernette were compared to those of the standard Bulgarian cultivars Izvor 10 and Sheynovo. The obtained results showed that the walnut cultivar Fernette has moderate to vigorous growth. The crown volume was 17.5 m³ at the end of the eight vegetation period. Compared to the control Bulgarian cultivars Izvor 10 and Sheynovo, the beginning of vegetation and flowering of Fernette starts considerably later. That characterizes it as a cultivar of good resistance to late spring frosts. The fruits of Fernette cultivar are large, their mean weight being 13.1 g. The average yield in 2009 and 2010 was 19.5 kg per tree and it did not differ statistically from the yield of Izvor 10, both cultivars surpassing Sheynovo cultivar in that characteristic. The leaves and fruits of Fernette cultivar are more resistant to anthracnose and equally susceptible to walnut blight compared to the Bulgarian cultivars Izvor 10 and Sheynovo. Obtained date about the chemical analysis of fruits showed that as lipid content in the kernel the investigated cultivars Izvor 10, Sheynovo and Fernette did not differ significantly. The reported oil content of Fernette cultivar was 64.49%, while for Izvor 10 and Sheynovo it was 64.75% and 66.35%, respectively
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