Chemical composition and morphometric traits and yield ofcarrots grown in organic and integrated farming systems

Authors : Natasa SINK, Maja Mikulic PETKOVSEK, Robert VEBERIC, Nina Kacjan MARSIC

Pages : 452-462

View : 14 | Download : 6

Publication Date : 2017-12-01

Article Type : Research Paper

Abstract :Changes in chemical composition and quality traits of carrot roots insert ignore into journalissuearticles values(Daucus carota L.); grown in organic insert ignore into journalissuearticles values(ORG); and integrated insert ignore into journalissuearticles values(INT); farming systems were investigated during two successive years. Three carrot cultivars insert ignore into journalissuearticles values(Fanal, Rodelika, and Rolanka); were included. Determinations of sugars, organic acids, α- and ß-carotene, and vitamin C were performed with an HPLC system, and a liquid chromatography-mass spectrometry insert ignore into journalissuearticles values(LC-MS); system was used for the identification and quantification of phenolics. A higher yield of carrot in the ORG system was observed insert ignore into journalissuearticles values(42-44 t ha-1); as compared with the INT system insert ignore into journalissuearticles values(37-40 t ha-1);. The impact of farming system on morphometric traits was cultivar-specific. The composition of sugars and carotenes was determined using compositional data analysis. The relative amount of sucrose against the combined amount of fructose and glucose was higher for roots from the ORG system compared to the INT system and for roots of Rodelika compared to Fanal. Roots from ORG farming contained 1.6-fold higher content of malic acid in Fanal and Rolanka and 2.4-fold in Rodelika compared to the INT system. Organic farming increased the content of vitamin C by 5% in roots of Rodelika, 15% in roots of Rolanka, and 22% in roots of Fanal compared to the INT farming. Changes in carotenes content in carrot roots were cultivar-specific with significantly higher α- and ß-carotene contents in Rodelika and Rolanka compared to Fanal. Farming system influenced the ratio of ß-car/α-car, which was higher for roots gathered from the INT system insert ignore into journalissuearticles values(1.9); compared to ORG system insert ignore into journalissuearticles values(1.7);, but the differences were not significant. Phenolic acids detected in the study differed significantly in relation to cultivar as revealed by lower concentrations in the roots of Rodelika and Fanal compared with higher levels in the roots of Rolanka.
Keywords : Daucus carota L, cultivars, integrated farming, organic farming, phenolic acid, carotenoid, sugar and acid components