Effect of plant bioregulators on breaking corm dormancy in gladiolus (Gladiolus grandiflorus L.) cv. Punjab Morning
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Date
2016-12
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G.B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand)
Abstract
The present investigation was carried out at Model Floriculture Centre, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, District- Udham Singh Nagar, Uttarakhand. The first experiment was carried out from October 2014 to April 2015 and the second experiment was carried out from April 2015 to October 2015. Investigation was laid out in randomized block design (RBD) with 13 treatment and three replications. Observations were recorded on various parameters like sprouting, vegetative growth, flowering, corms and cormels attributes. GA3 (150 ppm) was found effective for earlier sprouting (14.79 days), maximum plant height (82.03 cm), number of leaves (8.24) while the maximum number of tillers/plant (1.88) was exhibited by T6 (BA 150 ppm). Regarding flowering characters, the treatment T3 (GA3 150 ppm) responded best especially in commercial traits like days required for first floret showing colour (82.11 days), spike length (101.14 cm), rachis length (25.93 cm), number of floret/spike (16.45), diameter of 2nd floret (8.68 cm) and duration of flowering (22.17 days) while the maximum spike yield [281.50 (‘000’/ha)] was exhibited by T6 (BA 150 ppm). In respect of corms characters, there were significant effects of various plant bioregulators. The maximum number of corm/plant (3.03) was recorded in T6 (BA 150 ppm) while maximum weight of corm (29.19 g) was found in T9 (ethrel 750 ppm). Maximum cormels yield (4.03 t/ha) was found in T12 (thiourea 3%) while the maximum corms yield (10.66 t/ha) was registered in T4 (BA 50 ppm). On the basis of present findings, it may be concluded application of GA3 150 ppm is beneficial for breaking dormancy & enhancing economical characters of gladiolus.
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Horticulture