EFFECT OF PLANT GROWTH REGULATORS AND MICRONUTRIENTS ON FLOWERING, FRUIT SET AND YIELD OF SWEET ORANGE (Citrus sinensis L.) cv. SATHGUDI UNDER SOUTHERN ZONE OF TELANGANA
Loading...
Date
2018-10-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
College of Horticulture, Rajendranagar, HYD-30
Abstract
The present investigation entitled “Effect of plant growth regulators and micronutrients on flowering, fruit set and yield of sweet orange cv. Sathgudi under southern zone of Telangana” was conducted at Horticultural Research
Station, Konda Mallepally, Nalgonda.
The objective of this experiment was to study the effect of plant growth regulators and micronutrients on flowering, fruit set, yield and quality of sweet orange.
The experiment was laid down in Randomized Block Design (RBD) with 13 treatments and three replications. Plant growth regulators like 2, 4-D (20 and 30 ppm), GA3 (50 and 100 ppm) and NAA (100 and 200 ppm) at varied concentrations and in combination with micronutrients were sprayed at pre bloom stage, mid bloom stage and at 45 days after second spray.
The observations on number of days taken for 50% flowering, number of flowers per shoot, days taken from flower to marble stage, days taken from
marble to fruit maturity stage, number of fruits per branch, number of fruits per tree, fruit weight, fruit volume, fruit length, fruit diameter, number of seeds per
fruit, fruit set percentage, yield per tree, yield per hectare and quality parameters like physiological loss in weight, shelf life, total soluble solids, juice, reducing
sugars, non reducing sugars, total sugars, titrable acidity, ascorbic acid were
recorded.
The minimum number of days taken for initiation of 50% flowering (17.02), days taken from flower to marble stage (19.02), days taken from marble to fruit maturity stage (225.05), number of fruits per branch (25.47), fruit set percentage (71.03%), maximum fruit weight (250.42 g), fruit length (8.34 cm),
fruit diameter (7.48 cm), fruit volume ( 153.09 cm3), juice (50.09%), less number of seeds per fruit (9.34), yield per tree (75.29 kg/tree), yield per hectare (15.35
t/ha) were recorded in the trees sprayed with T9 i.e., GA3 50ppm + Arka Citrus Special (5g/lit).Whereas, maximum number of fruits per tree (305.05) was recorded in T7 - 2,4-D (20 ppm) + Arka Citrus Special (5g/lit) while minimum
was recorded in T13 - Control.
Data on quality of fruits differed significantly among the treatments, total
soluble solids (12.39˚Brix), reducing sugars (4.22 %), non reducing sugars (2.19
%) and total sugars (6.41%), ascorbic acid (62.09 mg/100g) were found to be maximum with Treatment T11 - NAA 100 ppm + Arka Citrus Special (5g/lit)
followed by T12 - NAA 200 ppm + Arka Citrus Special (5g/lit) while minimum
was recorded in T13 - Control.
In this study, the application of growth regulators and micronutrients i.e., GA3 (50 ppm) + Arka Citrus Special (5g/lit) was found to be superior as revealed by the results and thus can be recommended to increase the fruit weight and yield parameters of sweet orange followed by NAA (100 ppm) + Arka Citrus Special (5g/lit).
Description
The present investigation entitled “Effect of plant growth regulators and micronutrients on flowering, fruit set and yield of sweet orange cv. Sathgudi under southern zone of Telangana” was conducted at Horticultural Research
Station, Konda Mallepally, Nalgonda.
The objective of this experiment was to study the effect of plant growth regulators and micronutrients on flowering, fruit set, yield and quality of sweet orange.
The experiment was laid down in Randomized Block Design (RBD) with 13 treatments and three replications. Plant growth regulators like 2, 4-D (20 and 30 ppm), GA3 (50 and 100 ppm) and NAA (100 and 200 ppm) at varied concentrations and in combination with micronutrients were sprayed at pre bloom stage, mid bloom stage and at 45 days after second spray.
The observations on number of days taken for 50% flowering, number of flowers per shoot, days taken from flower to marble stage, days taken from
marble to fruit maturity stage, number of fruits per branch, number of fruits per tree, fruit weight, fruit volume, fruit length, fruit diameter, number of seeds per
fruit, fruit set percentage, yield per tree, yield per hectare and quality parameters like physiological loss in weight, shelf life, total soluble solids, juice, reducing
sugars, non reducing sugars, total sugars, titrable acidity, ascorbic acid were
recorded.
The minimum number of days taken for initiation of 50% flowering (17.02), days taken from flower to marble stage (19.02), days taken from marble to fruit maturity stage (225.05), number of fruits per branch (25.47), fruit set percentage (71.03%), maximum fruit weight (250.42 g), fruit length (8.34 cm),
fruit diameter (7.48 cm), fruit volume ( 153.09 cm3), juice (50.09%), less number of seeds per fruit (9.34), yield per tree (75.29 kg/tree), yield per hectare (15.35
t/ha) were recorded in the trees sprayed with T9 i.e., GA3 50ppm + Arka Citrus Special (5g/lit).Whereas, maximum number of fruits per tree (305.05) was recorded in T7 - 2,4-D (20 ppm) + Arka Citrus Special (5g/lit) while minimum
was recorded in T13 - Control.
Data on quality of fruits differed significantly among the treatments, total
soluble solids (12.39˚Brix), reducing sugars (4.22 %), non reducing sugars (2.19
%) and total sugars (6.41%), ascorbic acid (62.09 mg/100g) were found to be maximum with Treatment T11 - NAA 100 ppm + Arka Citrus Special (5g/lit)
followed by T12 - NAA 200 ppm + Arka Citrus Special (5g/lit) while minimum
was recorded in T13 - Control.
In this study, the application of growth regulators and micronutrients i.e., GA3 (50 ppm) + Arka Citrus Special (5g/lit) was found to be superior as revealed by the results and thus can be recommended to increase the fruit weight and yield parameters of sweet orange followed by NAA (100 ppm) + Arka Citrus Special (5g/lit).
Keywords
null
Citation
Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30