National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
An experiment was carried out at Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat (Assam) during 2015-17. The experiment was laid out in Factorial Randomized Block Design with three replications comprising 15 treatment combinations of five different concentration of gibberellic acid (GA3 0ppm, 50ppm, 100ppm, 150ppm and 200ppm) and three pinching levels viz., no pinching, pinching at 20 days and 40 days after transplanting (DAT).The result indicated that the important growth and physiological characters were significantly influenced by gibberellic acid and pinching treatments. The application of GA3 at 200 ppm recorded significantly higher plant height (85.36cm), number of branches/plant (39.72 branches/plant), total leaf number (183.43), number of flowers (63.80) and flower yield per hectare (10.19t). Among the pinching treatments, pinching at 40 DAT recorded significantly maximum number of branches (40.55 branches/plant), total leaf number (180.54), number of flowers (62.78) and flower yield per hectare (10.20t); whereas maximum plant height (86.61 cm) was found under no pinching. As far as physiological characters are concerned, relative water content (67.96%), root shoot ratio (0.31), root volume (70.92cc), total chlorophyll content (1.34mg g-1FW), and self-life of flower (7.38 days) was also improved with the application of 200ppm GA3. Among the pinching treatments, pinching at 40 DAT recorded maximum root volume (69.77cc), total chlorophyll content (1.36mg g-1FW), and self-life of flower (7.21 days).
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