Abstract
A study was carried out to evaluate the effect of plant growth regulators on growth, flowering and bulb production of tulip under Karewa conditions of Kashmir Himalaya during 2009 to 2011. The three different growth regulators; gibberellic acid (GA3) at 100, 200, and 400 ppm, 2-chloroethyl trimethyl ammonium chloride (CCC) and maleic hydrazide (MH) each at 100, 200 and 500 ppm along with control were applied as dip treatment and foliar spray. Plant height was recorded maximum with 400 ppm GA3(37.32 cm) followed by 200 ppm GA3 (34.13 cm). GA3 at 400 ppm significantly caused earliest flowering (141.30 days) followed by 200 ppm GA3 (142.43 days) as compared to the control (148.93 days), while delayed flowering were observed by 500 ppm MH (152.96 days) followed by 200 ppm MH (151.93 days). The longest blooming period was recorded in 200 ppm GA3 (28.46 days) followed by 400 ppm GA3 (27.76 days) in comparison to the control (21.59 days). The maximum vase life was obtained with 400 ppm GA3 (11.26 days) followed by 200 ppm GA3 (10.43 days) over the control (7.30 days). The maximum number of bulbs and daughter bulbs per plant were recorded with 400 ppm GA3 (1.43 and 3.03) followed by 500 ppm CCC (1.41 and 2.65) over the control (1.07 and 1.72), respectively and thereby enhanced propagation coefficient was obtained in 400 ppm GA3 (258.66%) followed by 500 ppm CCC (237.73%) as against the control (170.00%). Key words: Tulipa gesneriana, gibberellic acid, 2-chloroethyl trimethyl ammonium chloride, maleic hydrazide, blooming period, propagation coefficient.
Highlights
Tulip (Tulipa gesneriana L.), a bulbous flowering plant belongs to family Liliaceae, has become one of the world’s most important ornamental plants owing to wide range of beautiful cultivars of attractive colours and exquisite shapes
Plant height was recorded maximum with 400 ppm Gibberellic acid (GA3) (37.32 cm) followed by 200 ppm GA3 (34.13 cm)
Application of 100 ppm GA3 resulted in 32.83 cm plant height which was at par with the control (31.91 cm)
Summary
Tulip (Tulipa gesneriana L.), a bulbous flowering plant belongs to family Liliaceae, has become one of the world’s most important ornamental plants owing to wide range of beautiful cultivars of attractive colours and exquisite shapes. CCC application improved number and weight of bulb and daughter bulb per plant in tulip (Ahmed et al, 2009 and Mukherjee et al, 1999). Application of 500 ppm CCC resulted in maximum number of leaves per plant (4.76) followed by 200 ppm CCC (4.64) and 400 ppm GA3 (4.54) as compared to the control (3.62).
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