Fertilizer effects on nutrient elements, total polyphenol and antioxidant content of roselle hibiscus (Hibiscus sabdariffa L.) leaves of Senegal accession

Very little research focus has been placed on roselle hibiscus leaves even though they have been widely consumed by diverse groups of ethnic population. This research was conducted to (i) evaluate the effects of fertilizer treatments on the nutrient elements of the Senegal-origin roselle hibiscus leaves, (ii) quantify the distribution of nutrient elements on leaves located at top portion and lower portion of the 12-inch shoot and (iii) determine the total polyphenol and antioxidant contents of the leaves as affected by the fertilizer treatments. Dried leaves were prepared according to laboratory procedure established by the LSU Plant and Soil Analysis Laboratory and analyzed using ICP. Research data indicated that the application of 9...