Fatty Acids Profile of Olive Oil in Response to Nutrient-Based Organic Fertilizer of Olive Tree

Abstract

Abstract This research was conducted in season 2022 in a private farm planted with olive tree var. “Nabali”, in Al-Muqailibah – Damascus countryside, in order to evaluate the impact of certified organic fertilizer named “Chap Liquid” in the oil composition of fatty acids. The orchard is divided in to six experimental plots, in the first four one’s trees received the certified organic fertilizer, at two concentrations 1/50 and 1/100, as a ground fertilizer and foliar application for each rate, as well as two treatments of cow manure and chemical fertilizer. Fatty acids composition in olive oil samples were estimated in the Food Technology Laboratory at Faculty of Agriculture, Damascus University.The results showed that the oil of studied olive variety was affected positively by using certified organic fertilizer, increasing concentration of fertilizer significantly improve the saturated fatty acids contents, however, this was accompanied by a decrease of Oleic acid proportion, so the concentration of 1/100 was the best as the oleic acid was significantly increased in this rate.No significant differences were observed between the method applications of liquid fertilizer on the fatty acids profile. It is very important to benefit from these results in finding alternatives to chemical fertilizers in olive groves, as well as providing the trees nutrients during conversion to produce organic olive oil, especially since it tops the desired products for consumption in foreign markets.