EFFECT OF PLANT GROWTH REGULATORS ON GROWTH, FLOWERING, QUALITY AND CORM MULTIPLICATION IN GLADIOLUS (Gladiolus hybridus L.)
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Date
2018-07
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University of Horticultural Sciences, Bagalkot (COLLEGE OF HORTICULTURE, GKVK POST, BANGALURU)
Abstract
The present experiment entitled “Effect of plant growth regulators on growth, flowering quality and corm multiplication of gladiolus (Gladiolus hybridus L.)” was carried out during 2017-2018 in the Department of Floriculture and Landscape Architecture, College of Horticulture, Bengaluru. The experiment was laid out in Randomized Completely Block Design (RCBD) and was planted by using the corms soaked for 24 hrs with different growth regulators at different concentrations viz., BAP (25, 50 and 75 ppm), GA3 (50, 100 and 150 ppm) and NAA (50, 100 and 150 ppm) along with untreated control as treatments and was replicated thrice. Significant differences were observed among treatments with respect to growth, flowering quality and corm parameters. The results revealed that GA3 at 150 ppm recorded early sprouting of corms (9.00 days), significantly maximum sprouting percentage (83.91 %), maximum plant height (77.80 cm), stem girth (2.19 cm) and BAP at 75 ppm recorded maximum number of leaves per plant (12.76), leaf area (2173.45 cm2) and GA3 at 150 ppm took minimum number of days for spike initiation (54.73 days) and also recorded significantly maximum spike length (68.10 cm), rachis length (53.97 cm), number of florets per spike (15.07), size of floret (10.80 cm), weight of spike (82.69 g) and vase life (14.03 days). The maximum number of spikes per plant (1.47), spikes per ha (2.45 lakh spikes), corms per ha (4.05 lakh Nos.) and cormels per ha (1.94 t/ha) were recorded in the treatment BAP at 75 ppm.