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Introduction Hazelnut is one of the four major arboroid nuts in the world. There are about 20 species of hazelnuts, several species of hazelnuts such as C. America, C. avellana and C. colurna were widely cultivated in Asia, Europe and North America. Turkey is the world s leading producer of hazelnuts with a production of 400 000 tones, followed by European Union 145 000 tones , USA 37 200 tones and Azerbaijan 35 000 tones 1. In China, Hazelnut large area of cultivation is less, but there are wild varieties in the northeast and north of the mountains, Varieties are mainly Corylus heterophylla Fisch. and Corylus mandshurica Maxim. The main distribution of Corylus mandshurica Maxim is Hilly mountain in Heilongjiang, Liaoning and Jilin provinces of China. The average single weight and diameter of Corylus mandshurica Maxim is about 0.9 g and 1.37 cm, respectively, which is smaller than other species of hazelnuts. Currently, Hazelnuts are mainly used in the manufacture of food products including candy, chocolate, biscuits and pastries 2. In addition, other widely consumed product from hazelnuts is hazelnut oil 3. Hazelnut oil could be used

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