INTEGRATED NUTRIENT MANAGEMENT ON GROWTH, YIELD AND QUALITY OF ISABGOL(Plantago ovata Forsk.)UNDER NORTHERN DRY ZONE OF KARNATAKA
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Date
2019-08
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University of Horticultural Sciences, Bagalkot
Abstract
A field experiment was conducted during 2015-16 and 2016-17 rabi season at
Haveli farm, Department of Plantation, Spices, Medicinal and Aromatic crops COH,
Bagalkot, to study the integrated nutrient management on growth, yield and quality of
Isabgol (Plantago ovata Forsk.) under northern dry zone of Karnataka. Experiment was
conducted in split plot design with two varieties as main plots and sixteen INM
treatments as sub plot.
Among two Isabgol varieties Vallabh Isabgol-1 recorded the higher growth, yield,
quality and economic parameters plant height (33.18 cm), number of leaves plant-1
(46.24), dry matter (8.74 q ha-1), early days taken for 50 per cent flowering in (62.0),
number of spikelets per spike (85.84), spike length (3.58 cm), number of seeds per spike
(60.33), seed yield (12.30 q ha-1), husk yield (3.62 q ha-1), straw yield (23.93 q ha-1),
harvest index (18.11%), test weight (2.25g), swelling factor (16.08 cc g-1), moisture
(8.15%), carbohydrate (5.75%), gross return (` 52,526.6), net returns (` 73273.2) and B:C
ratio (` 2.85) over Gujarat Isabgol-2.
Integrated nutrient management(INM) with application of 75% RDF FYM + 75%
RDF NPK + Azospirillum (5 kg ha-1) + Phosphate Solubalising Bacteria (Bacillus
megaterium) (3 kg ha-1) + ZnSO4 (15 kg ha-1) + FeSO4 (15 kg ha-1) (N11) indicated higher
parameters viz., plant height (36.85 cm), number of leaves per plant (55.50), tillers per
plant (13.94), LAI (3.43), CGR (0.1306 g m-2day-1), dry matter (9.26 q ha-1), number of
days taken for 50% flowering (56.35), number of spikes per plant (47.13), number of
spikelets per spike (103.60), spike length (4.26cm), yield parameters viz., number of
seeds per spike (71.79), seed yield (15.43 q ha-1), husk yield (5.38 q ha-1), straw yield
(28.83 q ha-1) and HI (22.13%), test weight (2.57g), quality parameters viz., swelling
factor (17.99 cc g-1), ash (2.83%), moisture (7.73%), carbohydrate (6.69%), economics
viz., gross return (` 82,472.6), net return (` 73,977.2) and benefit cost ratio (` 1: 3.67) and
it was on par with those of RDF FYM (10t ha-1) + RDF NPK (50:25:30) +ZnSO4
+FeSO4 (N4), 50%RD FYM +75% RDF NPK + Azospirillum + Phosphate Solubalising
Bacteria (3 kg ha-1)+ZnSO4 +FeSO4 (N16) and, Vermicompost +50% RDF NPK +
Azospirillum + Azotobacter (N6) and least was recorded in RDF 50% FYM + 50 % RDF
NPK+ AZB (N13).
The treatment combination of Vallabah Isabgol-1 with 75% RDF FYM (7.5 t ha-1)
+ 75% RDF NPK (37.51: 18.75: 22.50 kg ha-1) + Azospirillum + Phosphate Solubalising
Bacteria (Bacillus megaterium) + ZnSO4 + FeSO4. (N11) exhibited higher values of
growth, physiological, yield attributes, quality and economics returns over other
treatment combination.