EFFECT OF PLANT GROWTH REGULATORS, CHEMICALS AND NUTRIENTS ON MORPHO-PHYSIOLOGICAL, BIOCHEMICAL AND YIELD AND YIELD AHRIBUTES IN MOTHBEAN [ Vigna aconitifolia (Jacq.) Marechal]
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Date
2002
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University of Agricultural Science, Dharwad
Abstract
"A field experiment was conducted during kharif, 2001 at Main
Research Station, University of Agricultural Sciences, Dharvvad to study
the effect of different growth regulators, chemicals and nutrients on
morpho-physiological, biochemical and yield and yield attributes in
mothbean. The experiment was laid out in randomized block design with
treatments comprising three growth regulators (NAA, cycocel and
miraculan); two chemicals (salicylic acid and β-naphthol) and three
nutrients (FeS04, ZnSO4 and KNO3) with three replications.
Application of NAA (20 and 40 ppm) and miraculan (2000 ppm)
significantly increased the plant height while, cycocel (500 ppm)
decreased the same. .Application of cxcocel (500 ppm) recorded
significantly higher number of nodes and number o[ branches followed b}'
NAA (20 and 40 ppm).
The treatment with growth regulators NAA (20 and 40 ppm) and
miraculan (2000 ppm) significantly increased the growth parameters viz.,
leaf area, LAI, SLW, LAR, BMD and LAD. The application of growth
regulators, chemicals and nutrients significantly increased RGR and CGR.
The leaf area, LAI, CGR. SLW, BMD showed a significant positive
correlation with seed yield.
The application of NAA (a 20 ppm was more effective and
significantly increased the seed yield followed by NAA @ 40 ppm,
miraculan @ 2000 ppm, cycocel @ 500 ppm, salicylic acid @ 500 ppm,
β-naphthol @ 10 ppm, FeS04 @ 0.5%, ZnS04 @ 0.5% and KN03@ 0.5% as
compared to control. The application of growth regulators, chemicals and
nutrients significanth' increased the number of seeds per plant, number
of pods per plant, pod weight, pod length and harvest index and these
parameters showed a significant positive correlation uith seed yield.
Among the treatments, NAA @ 20 ppm is more effective and economical in
mothbean."
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