Strawberries from integrated and organic production

As the nutritional quality of food is becoming increasingly more important forconsumers, significant attention needs to be devoted to agricultural practices and their influences on the nutrient contents in food. The presentedinvestigation studied the mineral contents and antioxidant activitiesin the fruits of four organically-grown strawberry cultivars \u27St. Pierre\u27, \u27Elsanta\u27, \u27Sugar Lia\u27 and \u27Thuchampion\u27 when compared to those of integrated-grown plants. The strawberries were digested and analyzed for K, Mg, Fe, Zn, Cu, and Mn using an atomic absorption spectrometer, whilst P was analyzed using a vanadate-molybdate method. In addition, antioxidant activity was estimated by using the ABTS assay. The results showed that the mineral contents and antioxidant activities in strawberries depends on the cultivar, and its production system. Organically-grown fruits showed higher antioxidant activities and Cu content than the integrated fruits, whilst the integrated fruits were superior in their contents of P, K, Mg, Fe and Mn. All the cultivars showed similar Zn content, probably reflecting the fact that the Zn content in strawberries does not depend on the cultivar.Hranilna vrednost živil postaja za potrošnike vedno bolj pomembna, zato je potrebno nameniti pozornost načinom pridelave in njihovim vplivom na vsebnost različnih hranil v živilih. Raziskovali smo vsebnost mineralov in antioksidativni potencial štirih ekološko pridelanih kultivarjev jagod »St. Pierre«, »Elsanta«, »Sugar Lia« in primerjali vrednosti z jagodami iz integrirane pridelave. Naredili smo kislinski razklop jagod in v raztopinah določili vsebnost K, Mg, Fe, Zn, Cu in Mn z atomsko absorpcijsko spektrometrijo. Vsebnost P smo določali po vanadat-molibdat metodi. Antioksidativni potencial ekstraktov jagod smo ocenili z ABTS metodo. Rezultati so pokazali, da je na vsebnost mineralov in na antioksidativni potencial vplival kultivar in način pridelave. Ekološko pridelane jagode so imele višji antioksidativni potencial in višjo vsebnost Cu, medtem ko so jagode iz integrirane pridelave vsebovale več P, K, Mg, Fe in Mn. Vsi kultivarji so imeli podobno vsebnost Zn, kar nakazuje, da njegova vsebnost v jagodah verjetno ni odvisna od kultivarja