Effect of foliar application of micronutrients and growth regulator on fruit yield of aonla (Emblica officinalis Gaertn.) cv. Gujarat Aonla-1

Abstract

The present experiment entitled “Effect of foliar application of micronutrients and growth regulator on yield of aonla (Emblica officinalis Gaertn.) cv. Gujarat Aonla-1” was carried out at Polytechnic in Horticulture, Junagadh Agricultural University, Junagadh during 20178-2018-19. The experiment was laid out in Factorial Completely Randomized Block Design (FCRD) consisting two factors with three replications. Five treatments of micronutrients and three treatments of growth regulator were considered as treatment combinations. The results indicated that the foliar application of micronutrients and growth regulator combination of borax @ 0.5% + NAA @ 20 ppm at three intervals; first spray on 15th May, second spray on 15th June and third spray on 15th July. Borax and NAA significantly increased overall fruiting and yield attributes including fruit set, fruit retention, fruit length, fruit diameter, average fruit weight, fruit volume and fruit yield, reduced the incidence of fruit drop (Borax @ 0.5% 19.11% as against 45.47% in control and NAA @ 20 ppm 28.43% as against 32.15% in control pooled ), resulting in increased fruit set (Borax @ 0.5% 68.75% as against 62.80% in control and NAA @ 20 ppm 70.91% as against 58.39% in control). The said combinations of micronutrients and growth regulator were also associated with fruiting parameters and higher fruit yield (120.20 kg/tree).