IMPACT OF PLANT GROWTH REGULATORS ON GROWTH AND FLOWERING OF GLADIOLUS (Gladiolus grandiflorus L.) CV. CANDYMAN UNDER CHHATTISGARH PLAINS
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Date
2016
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Indira Gandhi Krishi Vishwavidyalaya, Raipur
Abstract
The present investigation entitled “Impact of plant growth regulators on growth and flowering of gladiolus (Gladiolus grandiflorus L.) cv Candyman under Chhattisgarh plains condition.” Was conducted in Rabi season during 2015-16 at Research cum Instruction Farm, Department of Horticulture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.). The experiment comprised of three growth regulators with three concentration viz., NAA (25 ppm, 50 ppm and 100 ppm) GA3, (200 ppm, 250 ppm and 300 ppm) and CCC (150 ppm, 200 ppm and 250 ppm).
Each growth regulator at three concentrations in addition to distilled water spray as control comprised ten treatments of this experiment. The experiment was laid out in a Randomized Block Design (RBD) with three replications. The data were analyzed to work out the effect of plant growth regulators on morpho-physiological traits viz., plant height, number of leaves per plant, length of leaves, number of days taken to first spike emergence, length of spike, length of rachis, internodal length of floret, number of days taken to first floret open/bloom, number of florets per spike, vase life, number of spike per square meter and yield traits (number of corm per plant, diameter of corm, weight of corm per plant, number of cormel per plant, and weight of cormel per plant) of gladiolus.
Application of GA3 @ 200 ppm foliar spray at 40 days after planting was found more effective for better performance of different attributes namely, plant height, number of leaves, length of leaves, first spike emergence, first floret open / bloom, spike length, rachis length, number of floret, internodal length, diameter of flower, number of spike per meter square, vase life of cut spike (days) and diameter of corm. Whereas, CCC @ 200 ppm foliar spray at 40 days after planting was found best for maximum number of corms per plant, number of cormels, weight of corms and weight of cormels.
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95 p.