"STUDIES ON THE EFFECT OF PLANT GROWTH REGULATORS AND COCONUT WATER ON ROOTING OF BOUGAINVILLEA (Bougainvillea spectabilis. L) STEM CUTTINGS”
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Date
2019-01-04
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SRI KONDA LAXMAN TELANGANA STATE HORTICULTURAL UNIVERSITY,MOJERLA
Abstract
The present investigation entitled “Studies on the effect of plant growth
regulators and coconut water on rooting of Bougainvillea (Bougainvillea
spectabilis L.) stem cuttings’’ was conducted at College of Horticulture,
Mojerla, Wanaparthy (Dist) in the year 2017-18. The experiment consists of
three different concentrations of IBA (1000 ppm, 1500 ppm and 2000 ppm) and
NAA (1000 ppm, 1500 ppm and 2000 ppm) treated in combination with two
different concentrations of coconut water (100 ml, 50 ml) along with control
(alone treated with coconut water) dipped for two hours which were treated for
root initiation in stem cutting of Bougainvillea. The experiment was laid out in
Factorial Completely Randomized Design with three replications. Semi
hardwood cuttings of Bougainvillea were planted in polybags containing one
part of red soil, two parts of sand and one part of compost.
Among the treatments of plant growth regulators, IBA 2000 ppm
recorded earlier sprouting (6.06), root formation (7.54) number of shoots
(4.72), roots (16.91), leaves (47.82), highest leaf area (17.96 cm2
), longest
length of the shoot (22.75 cm), root per cutting (33.86). Maximum fresh
weight of shoot (27.04 g), root (27.54 g) and maximum dry weight of shoot
(12.33 g) root (13.77 g) and survival percentage (93.71).
Concentration of coconut water significantly influenced almost all
parameters. The results were observed more favorable with 100 ml coconut
water than 50 ml coconut water. With 100 ml coconut water, early sprouting
(9.29), early root formation (9.49), longer shoot (15.87cm), root (25.02 cm),
more number of shoots (3.84), roots (11.71), leaves (34.03), highest leaf area
(12.30 cm2
), increased fresh weight of shoot (18.43 g), root (19.70 g) and dry
weight of shoot (8.64 g) and root (9.16 g) and survival percentage (82.52 %)
per cutting were recorded.
The interaction between plant growth regulators and coconut water
significantly influenced almost all parameters. The results revealed that plant
growth regulator IBA and NAA in combination with coconut water had
significantly affected root and shoot growth of bougainvillea. IBA 2000 ppm
with 100 ml coconut water registered earlier sprouting (5.50), earlier root
formation (7.36), more number of shoots (4.81), more number of roots (17.82)
and maximum number of leaves (49.70) per cutting. Further, maximum leaf
area (18.57 cm2
) longer shoot (23.73 cm), longer root (34.76 cm), fresh weight
(28.13 g) and dry weight of the shoot (12.63 g), fresh weight (28.41 g) and
dry weight of the root (14.11 g) and maximum survival percentage (94.95%)
of rooted cuttings were also recorded under IBA 2000 ppm with 100 ml
coconut water.
The data on the economics of plant growth regulator treatment showed
that among the treatments NAA 2000 ppm (2.57) and IBA 2000 ppm (2.52)
with 100 ml coconut water recorded the highest benefit cost ratio over other
treatments.
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