EFFECT OF GROWTH REGULATORS AND NUTRIENTS ON YIELD AND QUALITY OF GUAVA (Psidium guajava L.) cv. LUCKNOW-49 (SARDAR)
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Date
2016-08-10
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College of Horticulture, Rajendranagar, HYD-30
Abstract
Guava (Psidium guajava L.) is one of the most popular fruit grown in tropical and subtropical regions of India, which belongs to the family Myrtaceae and originated in Tropical America. It is known as ‘Apple of Tropics’, it is rich source of vitamin-C and pectin content besides being a good source of other vitamins and minerals. One of the novel techniques to improve yield and quality of guava fruit is the use of plant growth regulators (PGRs) and mineral nutrients. The present investigation was carried out under the objective, to evaluate the effect of growth regulators and nutrients on yield and quality of guava (Psidium guajava L.) Cv. Lucknow-49 (Sardar)” was carried out during the period from August, 2015 to December, 2015 at Horticulture Research Station (HRS), Konda Mallepally, Nalgonda district, SKLTSHU, Telangana. The experiment was laid out in randomized block design with 13 treatment and 3 replications.
The treatments consisted of control (T1), GA3 @ 50ppm (T2), GA3 @ 100ppm (T3), GA3 @ 150ppm (T4), NAA @50 ppm (T5), NAA @ 100 ppm (T6), NAA @150 ppm (T7), urea @ 1% (T8), urea @ 2% (T9), urea @ 3% (T10), borax @ 0.2% (T11), borax @ 0.4% (T12), and borax @ 0.6% (T13) were sprayed twice at 30 days and 60 days after flowering in Mrig bahar season.
The various yield and yield attributing parameters like number of fruits /plant, diameter of fruit (cm), fruit yield (kg /plant), yield /ha, average fruit weight (g), number of seeds /fruit, weight of seeds /fruit, seed to pulp ratio and fruit quality parameters like TSS (0Brix), ascorbic acid (mg/100g fresh fruit), pectin (%), titratable acidity (%), total sugars (%), reducing sugars (%), non reducing sugars (%), brix- acid ratio, shelf life (in days) and B:C ratio were recorded.
From the study, the results enunciated that, the yield and yield attributing characters were influenced significantly by foliar application of different concentrations of growth regulators and nutrients. The fruit diameter (6.5 cm), average fruit weight (179.33g), yield /tree (67.5kg) and yield /ha (18 t/ha) were found significantly highest with the foliar application of borax 0.6% while, number of fruits /tree (380) were recorded highest with foliar application of NAA @ 150 ppm, number of seeds /fruit (273.67) were recorded lowest with the foliar application of NAA @ 50 ppm, weight of seeds /fruit (4.38g) was recorded lowest with the foliar application of GA3 @ 50 ppm and seed to pulp ratio (0.02) was recorded lowest with the foliar application of GA3 @ 50 ppm and GA3 @ 100 ppm.
Data on quality of fruits differed significantly among the treatments. Reducing sugars (4.98%), non reducing sugars (2.77%), total sugars (7.77), TSS (11.70), TSS : acid ratio (30), pectin content (0.83%) and vitamin C (151mg /100g) were found significantly highest with the foliar application of borax 0.6% while, titratble acidity (0.39) was found lowest in borax 0.6%, shelf life (8.3 days) was found significantly highest in GA3 @ 100 ppm and B:C ratio (2.79) was found significantly highest in urea 3%.
In conclusion, the treatment T13 (borax @ 0.6%) recorded significantly highest fruit yield per plant without impairing the quality of fruit, followed by T12 (borax @ 0.4%) application.
Description
The treatments consisted of control (T1), GA3 @ 50ppm (T2), GA3 @ 100ppm (T3), GA3 @ 150ppm (T4), NAA @50 ppm (T5), NAA @ 100 ppm (T6), NAA @150 ppm (T7), urea @ 1% (T8), urea @ 2% (T9), urea @ 3% (T10), borax @ 0.2% (T11), borax @ 0.4% (T12), and borax @ 0.6% (T13) were sprayed twice at 30 days and 60 days after flowering in Mrig bahar season.
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Citation
Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30