RESPONSE OF PINEAPPLE cv. KEW TO DIFFERENT LEVELS OF NUTRIENTS UNDER HIGH DENSITY PLANTING IN HILL ZONE OF KARNATAKA
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Date
2019-07
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University of Horticultural Sciences, Bagalkot
Abstract
An investigation on the “Response of pineapple cv. Kew to different levels of
nutrients under high density planting in hill zone of Karnataka” was conducted at
Department of Fruit Science, College of Horticulture, Sirsi, during 201719.
Among different treatment levels, with respect to vegetative parameters T2S5
[Azotobacter (5kg/ha) + 80% RDN + 20% RDN through vermicompost + ZnSO4
(10 kg/ha) + Boron (5 kg/ha)] recorded the highest number of leaves (41.40), D-leaf
length (64.00 cm), D-leaf breadth (3.64 cm), average leaf length (64.00 cm), average
leaf breadth (3.67 cm), leaf area (8853.11 cm2) in the crop compared to other treatment.
Fruit length (19.06 cm), fruit diameter (40.33 cm), crown length (36.44 cm),
crown diameter (64.08 cm), fruit weight with crown (2.18 kg), fruit weight without
crown (1.76 kg), crown weight (416.67 g), fruit weight: crown weight ratio (5.22) fruit
yield per plant (2.18 kg), fruit yield per hectare (94.68 t), TSS (15.92 0B), Vitamin C
(25.67 mg/100g), reducing sugars (14.13 %), total sugars (19.23 %) and the lowest
acidity (0.72%) were recorded in T2S5.
Further, the same treatment also shown significantly the maximum available
nitrogen (319.23 kg/ha), potassium (294.92 kg/ha), zinc (1.85 ppm), boron (0.91 ppm)
in soil and organic carbon (1.52 %) in soil and nitrogen (3.43 %) and potassium
(3.07 %) in leaves.
The highest net returns of Rs 7,20,825 and benefit cost ratio (2.73:1) was
obtained with the application of Azotobacter (5kg/ha) + 80% RDN + 20% RDN through
vermicompost + ZnSO4 (10 kg/ha) + Boron (5 kg/ha) as compared to other treatments.