Efficacy of pre-harvest foliar application of potassium nitrate, urea and salicylic acidon biochemical changes and yield in mango cv. Mallika (Mangifera indica L.)

The present study was carried out in two successive years in 2021 and 2022 to show the efficacy of potassium nitrate, urea and salicylic acid alone and in combination to improving the biochemical and yield attributes of Mallika mango.The studies revealed that the fruit quality in terms of total sugar, total soluble solids, titratable acidity, ascorbic acid, total antioxidant capacity, total phenol increased significantly in the combination treatment consist of two foliar applications, first in last week of October and second in mid November. Yield in number (38.33) fruits per plant and maximum average weight per fruit (497.62 g) was obtained in the treatment T 15 (Potassium nitrate 3% + Urea 2% + Salicylic acid 2000 ppm).The above treatment combination also increases total sugar (17.26%), total soluble solids (24.09 °Brix), ascorbic acid (37.23 mg/100g), total antioxidant capacity (1.33 µmol. Trolox equiv.100 g -1 FW), total phenol (129.41 mg Gallic acid equiv. g-1 FW pulp)andtitratable acidity (0.340 %)in comparison to control (water spray).