Effect of foliar applied zinc, manganese and boron on sweet orange quality
1999
Hafeez-ur-Rehman | Ali, N. | Rafique, M.
Foliar application of zinc, manganese and boron alone and in various combinations were applied to sweet orange trees at the rate of 0.4, 0.2 and 0. 04 kg in the presence of 1.56 kg N (Urea) and 0.4 kg surf ha-1 dissolved in 400 L of water according to completely randomized design physical characteristics of fruits such as size and volume and chemical composition of juice were determined. Zinc foliar spray significantly increased vitamin C content and total soluble solids in orange juice. Manganese foliar spray significantly increased total soluble solids and %age of non-reducing sugar in orange juice. Foliar application of boron significantly increased fruit size, % juice, reducing and non-reducing sugar but reduced the percent acidity significantly in orange juice. The other quality parameters i.e. juice pH, fruit volume and percent rage was found unaffected with the application of Zn, Mn and B.
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