Studies on integrated nutrient management in flowering, fruiting, yield and quality of mango cv. Amrapali under high density orcharding

Abstract

An experiment was carried out to evaluate the response of organic nutrients (FYM, Vermicompost and Biodynamic compost), inorganic manures (NPK), biofertilizers (Azotobacter and PSB), micronutrients (zinc and iron) and paclobutrazol (Cultar) on flowering, fruiting, yield and quality of mango cv. Amrapali under high density orcharding. The maximum panicle length (23.92 and 23.96 cm), number of flowers per panicle (1710.67 and 1756.00), fruit set per panicle (194.67 and 201.33) and sex ratio (0.690 and 0.691) were recorded with T8 (recommended NPK + vermicompost + Azotobacter + PSB + Zn + Fe + paclobutrazol) which was at par with T12 (recommended NPK + biodynamic compost + Azotobacter + PSB + Zn + Fe + paclobutrazol). The fruit physical parameters viz., maximum fruit length (9.88 and 10.08 cm), width (6.62 and 6.48 cm), weight (151.25 and 153.00 g), pulp weigh (97.06 and 97.08 g), stone weight (26.45 and 26.62 g), pulp : stone ratio (3.693 and 3.694), number of fruits per tree (163.33 and 184.67) and fruit yield (25.00 and 26.72 q/ha) was recorded with T8 (recommended NPK + vermicompost + Azotobacter + PSB + Zn + Fe + paclobutrazol) closely followed by T12 (recommended NPK + biodynamic compost + Azotobacter + PSB + Zn + Fe + paclobutrazol). However, the chemical composition of fruit viz., maximum TSS (23.72 and 23.91 °Brix), TSS: acid ratio (191.60 and 197.76), ascorbic acid content (44.13 and 45.63 mg/100 g), carotenoids (18.91 and 18.63 mg/100 g), reducing sugars (8.35 and 8.39%), non reducing sugar (9.94 and 9.95%), total sugars (18.29 and 18.34%) and minimum acidity content (0.120 and 0.121%) were recorded with the application of T8 (recommended NPK + vermicompost + Azotobacter + PSB + Zn + Fe + paclobutrazol) which was at par with T12 (recommended NPK + biodynamic compost + Azotobacter + PSB + Zn + Fe + paclobutrazol) during both the years of experimentation.