EFFECTS OF ORGANIC AND CHEMICAL FERTILIZERS ON THE CONTENT OF MAJOR PHENOLIC COMPOUNDS OF CARROTALA’ ALI AHMAD AL-SUBEIHI, ABDUL AWAL, MD. WADUD AHMED, MARUF AHMED, TANIA ALAM, MD. SIRAJUL ISLAM KHAN AND MOHAMMED ARIFUL ISLAM
Carrot is a popular winter vegetable rich in health-promoting phenolic compounds. In this study, different chemical and organic fertilizers were used during cultivation to observe the effect on major phenolic compounds (total phenols, total flavonoids, and proanthocyanidins) of carrot roots. Total five treatments which are F1=100% organic fertilizer, F2= 100% chemical fertilizer, F3= 75% chemical + 25% organic fertilizer, F4= 50% chemical + 50% organic fertilizer (of recommended dose) and F5= local control with three replications were applied in the experiment designed in Randomized Completed Block Design (RCBD). The contents of total phenols varied significantly in response to the chemical and organic fertilizer treatment. The highest amount of total phenols (10.549 mg kg-1) was found in F2 treatments where 100% chemical fertilizer of the recommended dose was applied, and the lowest amount (7.126 mg kg-1) was found in F5 treatment where no fertilizer was applied. The content of total flavonoids and proanthocyanidins did not vary significantly in response to the fertilizer treatments. Based on the current study, it is not proven that organically fertilized carrot contains more amount of health-promoting phenolic compounds than chemically fertilized carrot.