EFFECT OF PGRS ON GROWTH, FLOWERING AND SEED PRODUCTION IN MARIGOLD CV. PUSA NARANGI GAINDA
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Date
2017
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Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu
Abstract
The present investigation entitled “Effect of PGRs on growth, flowering and seed production in marigold cv. Pusa Narangi Gainda” was carried out at Experimental Farm, Division of Vegetable Science & Floriculture, Sher-e-Kashmir University of Agricultural Sciences and Technology, Chatha during 2016-17. The experiment was laid out in a Factorial Randomized Block Design with 18 treatment combinations viz., 2 times of application of growth regulators (25 and 50 days after transplanting) and nine growth regulators treatments (Control, 150 ppm Gibberellic acid, 250 ppm Gibberellic acid, 150 ppm Salicylic acid, 200 ppm Salicylic acid, 75 ppm Benzyl adenine, 100 ppm Benzyl adenine, 1000 ppm Cycocel and 1500 ppm Cycocel). Among the times of application, significantly maximum plant height (60.61cm), plant spread (52.22cm), number of laterals (11.62), minimum number of days taken to first flower bud initiation (51.91 days), number of flowers per plant (45.60), flower diameter (7.60cm), maximum flowering duration (44.29 days), weight of flower (8.51 g), shoot fresh weight (235.89g), root fresh weight (44.75 ), flower yield /plant ( 394.93g ), flower yield/per plot/per hectare (6.32 &19746.74 kg),seed yield/plant (18.91g), seed yield per plot/per hectare (302.58 g & 945.56 kg),germination percentage (83.96%), seed vigour index (919.00), chlorophyll content (56.17%) was recorded when spray was scheduled after 25 days of transplanting whereas, minimum was recorded with application at 50 DAT. The effects of time of application on shoot fresh weight, shoot dry weight, root fresh weight, root dry weight, root: shoot ratio and 1000 seed weight was found to be non-significant. Whereas, among the growth regulator treatments tested, 250 ppm Gibberellic acid (GA3) proved superior followed by 150 ppm Gibberellic acid and 200 ppm Salicylic acid thereby recording maximum plant height (65.44cm), plant spread (57.70 cm), minimum number of days taken to first flower bud initiation (50.40days), number of flowers per plant (45.45 ), maximum flower diameter (8.22cm ), weight of flower (9.01 g), shoot fresh weight (282.33g), root fresh weight (47.63g), root/shoot ratio on fresh weight basis (0.239), flower yield /plant (409.73 g), flower yield/per plot/per hectare (6.56 & 20486.33kg),seed yield/plant(22.76g),seed yield per plot/per hectare (364.08 g &1137.75 kg), germination percentage (90.00 %), seed vigour index (1016.05) and chlorophyll content (56.99%). However, highest number of laterals (12.30) and maximum flowering duration (45.83 days) were recorded with 100ppm Benzyl adenine. Among the interaction effects, 25 DAT + 250 ppm Gibberellic acid (GA3) recorded the highest values in parameters of economical importance. Highest B: C ratio of 2.47 was recorded in 200 ppm Salicylic acid (SA) at 25 DAT followed by B: C ratio of 2.44 by 250 ppm Gibberellic acid at 25 DAT.
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