In this research, proximate composition, mineral composition and color characteristics of hazelnuts grown by conventional and organic methods in East, Central and West Black Sea Regions (Turkey) that are the center of world hazelnut production were investigated. Commercially important ‘Çakıldak’, ‘Foşa’, ‘Mincane’, ‘Palaz’, ‘Sivri’ and ‘Tombul’ varieties were selected as research material. As a result of the analysis, it was determined that organic hazelnuts contain lower moisture and higher ash, no difference was found in protein, fat and carbohydrate amounts. In terms of all micro elements (boron, copper, iron, manganese, zinc) organic hazelnuts were found to be richer and potassium from macro elements were found to be higher in conventionally grown hazelnuts. Color properties were generally not affected by the production method and no loss of color was observed in organic hazelnuts. The high ash and micro element content of organic hazelnuts compared to the conventional hazelnuts would be a good alternative for the elimination of micro element deficiency, which is frequently seen in human nutrition.

在这项研究中，对世界榛子生产中心东、中部和西黑海地区（土耳其）采用常规和有机方法种植的榛子的近似成分、矿物成分和颜色特征进行了调查。商业上重要的“Çakıldak”、“Foşa”、“Mincane”、“Palaz”、“Sivri”和“Tombul”品种被选为研究材料。分析结果表明，有机榛子含有较低的水分和较高的灰分，蛋白质、脂肪和碳水化合物的含量没有发现差异。就所有微量元素（硼、铜、铁、锰、锌）而言，在常规种植的榛子中发现有机榛子更丰富，而宏观元素中的钾含量更高。颜色特性通常不受生产方法的影响，并且在有机榛子中没有观察到颜色损失。与传统榛子相比，有机榛子的高灰分和微量元素含量将是消除人类营养中常见的微量元素缺乏症的良好替代品。