*Corresponding author:Yadong Qi, Urban Forestry Program, Southern University land Grant Campus, Southern University and A&M College, Baton Rouge, LA 70813
Received: April 24, 2018; Published: May 08, 2018
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A great deal of research has been geared toward the calyces of roselle due to their medicinal properties. Though leaves of roselle have been consumed by diversed ethnic groups, little research efforts have been focused on leaves due to unestablished beneficial bioactivities. This paper provides preliminary data on the effect of various types and rates of fertilizer on fresh fruit yields, total polyphenol and antioxidant contents of the leaves of roselle (Senegal accession). Fertilizer applications at planting time had nonsignificant increasing effect on fresh fruit yield/plant and non-significant reduction in total polyphenol and antioxidant contents of the leaves. Inconsistent effects of applied fertilizer on macro and micro nutrient contents of the leaves were observed. In general, N, P, K, Ca, Mg, S, B, Mn and Zn were significantly (P<0.05) increased by selective fertilizer types and rates while Cu and Fe contents were not significantly affected by fertilization. Further studies on fertilization along with increased frequencies of application are needed to validate these findings.
Keywords: Roselle; Hibiscus sabdariffa; Fertilizer; Phenols; Antioxidants and fruit yield
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