Author(s):

Mangali Mounika, Dr. T Suresh Kumar, Dr. A Kiran Kumar, Dr. Veena Joshi and Dr. N Sunil

Abstract: The experiment “Studies on the effect of foliar application of calcium, potassium and silicon on quality and shelf life of sweet orange (Citrus sinensis. L) Cv. Sathgudi” was conducted at Horticultural Research Station, Konda Mallepally in an existing sweet orange orchard on fifteen year old trees. The experiment was laid out in randomized block design (RBD) with thirteen treatments consisted of T₁ - 1.0% KNO₃ (potassium nitrate), T₂ - 1.5% KNO₃ (potassium nitrate)_, T₃ - 2.0% KNO₃ (potassium nitrate), T₄ - 4 ml/L K₂SiO₃ (potassium silicate)_, T₅ - 6 ml/L K₂SiO₃ (potassium silicate), T₆ - 8 ml/L K₂SiO₃ (potassium silicate), T₇ - 1.0% Ca(NO₃)₂ (calcium nitrate), T₈ - 1.5% Ca(NO₃)₂ (calcium nitrate)_, T₉ - 2.0% Ca(NO₃)₂ (calcium nitrate)_, T₁₀ - 1.0% CaCl₂ (calcium chloride)_, T₁₁ - 1.5% CaCl₂(calcium chloride), T₁₂ - 2.0% CaCl₂ (calcium chloride), T₁₃ - control. Data on quality and shelf life differed significantly among the treatments. it was observed that quality of the fruits were found significantly highest with treatment T₄ - potassium silicate 4 ml/L, with fruit juice content (46.37%), Total soluble solids (12.07 B°), total sugars (6.28%), reducing sugars (4.10%), non-reducing sugars (2.18%), low titrable acidity (0.53%). and shelf life was significantly highest in treatment T₇ - 1% Ca(NO₃)₂ shelf life (27.70 days).

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