STANDARDIZATION OF FERTIGATION AND IRRIGATION SCHEDULE IN MANGO CV. BANESHAN UNDER NORTH-EASTERN TRANSITIONAL ZONE OF KARNATAKA
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Date
2021
Authors
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Journal ISSN
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Publisher
University of Horticultural Sciences, Bagalkot. (College of Horticulture, Bagalkot).
Abstract
An experiment entitled ‘Standardization of fertigation and irrigation schedule in
mango cv. Baneshan under north-eastern transitional zone of Karnataka’ was conducted
at College of Horticulture and farmer’s field in Bidar, Karnataka during 2018 to 2020.
The experiments were laid out in a randomized block design and observations on
growth, biochemical parameters in leaf, soil and leaf nutrient uptake, soil moisture
dynamics, flowering, fruiting, yield and quality attributes were recorded.
The results revealed that, among the different fertigation treatments, the plants
applied with 100 per cent of RDF through fertigation (T2) recorded the maximum mean
values for tree height (5.01 m), canopy volume (98.84 m3
), leaf area index (4.09), total
chlorophyll (4.10, 4.46 and 3.56 mg g-1
fresh weight), nitrate reductase activity (26.69,
34.44 and 30.43 μg NO2 g-1
h
-1
fresh weight) during pre-flowering, flowering and fruit
development stages, respectively. The plants in the same treatment (T2) also registered
the maximum fruit set (6.77 %), average fruit weight (361.78 g), number of fruits per
tree (63.04) and the maximum fruit yield (23.33 kg/tree and 9.33 t/ha). However, the
economic assessment revealed that the B:C ratio was marginally higher (1: 2.79) in T3
treatment (75 per cent of RDF application through fertigation) in comparison with B:C
ratio of T2 (1: 2.73), while the control plants recorded a B:C ratio of 1: 1.67.
The studies on water requirement revealed that among the various treatments,
plants applied with 80 per cent of evaporation replenishment through drip irrigation
system (T6) recorded the maximum soil moisture content and low soil temperature
regimes across different soil depths (10, 20 and 30 cm) during January to May months.
The plants in T6 also recorded the maximum canopy spread, nitrate reductase activity
with the mean maximum number of panicles per tree (962.10), maximum fruit set (4.19
%), number of fruits per tree (56.60) with the maximum mean fruit yield (21.25 kg/tree
and 8.48 t/ha) when compared to control plants (12.49 kg/tree and 4.99 t/ha) under
rainfed situation.