Effect of foliar application of nitrogen and plant growth regulators on bearing, physico-chemical constituents and shelf-life of mango (Mangifera indica L.)

Abstract

The experiment was carried out on ten-year-old Amarapali mango (Mangifera indica L) in randomized block design with seventeen treatments with three replications at BAU, Ranchi to study the effect of foliar application of nitrogen and plant growth regulators on bearing and physico-chemical constituent and self life of mango. Among the different treatments, application of 200ppm ethephon had most favourable effect in causing earliness in panicle emergence days (16.0 days), initiation of first flower (12.3 days) and days to initiation of fruit set (10.3 days) over control. Whereas application of 2000ppm triadimefon in combination with 2% urea increased intensity of flowering shoot to the extent of88.5% in fruit plant. The maximum number of fruit set per panicle (44.7), fruit retention (12.1%) and number of harvested fruit per tree (194.4) were observed with combined use of 100ppm SA and 2% urea as compared to control. The highest TSS (25.1 0Brix) and reducing sugar (3.0%) content were registered under 100ppm GA3, while the highest phenol (2.84mg/100g) was recorded from the fruits of the plants sprayed with 200ppm ethephon in combination with 2% urea. However, minimum (11.1%) physiological loss in weight (PLW) was recorded in 100ppm SA along with 2% urea.