Effect of IBA concentrations and planting time on the rooting in stem cutting of bougainvillea cv. Torch glory
1. SEMINAR TOPICS
EFFECT OF IBA CONCENTRATIONS AND
PLANTING TIME ON THE ROOTING IN
STEM CUTTING OF BOUGAINVILLEA Cv.
TORCH GLORY
Dr. Krishan Kumar Singh
4. MATERIALS AND METHODS
This investigation was conducted at the Horticultural
Research Centre of HNB Garhwal University,
Srinagar (Garhwal), Uttarakhand, India during winter
months of 2008-2009. The experimental materials
consisted of 15 cm long hardwood stem cuttings of
Torch Glory Bougainvillea were collected from 3 year
old plants growing on sloppy land. While preparing
the cuttings, a smooth cut in each cutting was given on
distal end and slanting cut was given at lower end just
below the lower node.
5. The experiment was replicated thrice with 10
cuttings in each treatment and a total of 1330
cuttings were tested. The planting of treated cuttings
was started from November 15 at interval of one
month and last up to February 15. The basal ends of
the cuttings were dipped in dilute solutions, 500
ppm onwards up to 5000 ppm with a difference of
500 ppm, of indole-3-butyric acid by quick dip
method for 10 seconds before planting them in the
rooting medium.
6. For preparing the rooting media, the soil, sand and
farm yard manure (FYM) in ratio of 1:1:1 by v/v
were mixed thoroughly, cleaned for stones and
grasses, then the mixture was filled in perforated
transparent polythene bags of 1 kg capacity, tightly
leaving one inch space at the top. Two cuttings were
planted in each bags placing under net house
condition. The trail was replicated thrice for each
treatment. The number of sprouted/cuttings, length
of sprout/cutting, number of sprouts/cutting,
number of primary roots/cutting, length of
root/cutting and the rooting percentage of cuttings
were recorded after three months of planting.
7. Description of cultivar
Torch Glory: Shurbs and woody, stem
cylindrical, green in colour, some time brown
prikle, thorn are present, axillary bud present.
Leaf: Simple leaf, green in colour, spnous
stipule, acuminate leaf apex, entire leaf margin.
Inflorescence: cymose Flower: Pedicilate,
hermaphrodite, complete, bractiate, attached to
tapals, bract colour pink. flowring time All the
year.
8. Observations recorded
A- Shoot observations
• Number of sprouted cuttings
• Number of unsprouted cuttings
• Number of dead cuttings without sprouting
• Number of dead cuttings after sprouting
• Average length of sprout
• Average diameter of sprout
• Number of sprouts per cutting
• Average number of leaves per cutting
9. • Average fresh weight of shoot per cutting
• Average dry weight of shoot per cutting
B- Root observations
• Percentage of rooted cuttings
• Average number of primary roots per cutting
• Average number of secondary roots per
cutting
• Average length of roots per cutting
• Average fresh weight of roots per cutting
• Average dry weight of roots per cutting
10. EXPERIMENTAL RESULTS
• The maximum number of sprouted cutting
(100%) was produced under 500, 1500, 2500 and
3000 ppm concentration of IBA when planted on
February 15 planting time.
• The minimum number of unsprouted cuttings
(0.00) was recorded under all the concentrations
of IBA including control when planted on
February 15 planting time
11. The minimum number of dead cuttings without
sprouting (0.00) was recorded under all the
concentrations of IBA including control when
planted on January 15 planting time and 1500
ppm, 3500 ppm and 4500 ppm concentrations of
IBA when planted on December 15. It was also
found under 500 ppm concentrations of IBA when
planted on February 15.
12. •The minimum number of dead cuttings after
sprouting (0.00) was recorded under 500 ppm,
1500 ppm, 2500 ppm, 3000 ppm, 4000 ppm,
4500 ppm, 5000 ppm concentrations of IBA and
control when planted on February 15 planting
time and 3500 ppm, 4500 ppm concentrations of
IBA and control when planted on January 15 and
under control when planted on December 15.
13. •The maximum length of sprout per cutting (18.77cm)
was found under 3000 ppm concentration of IBA with
February 15 planting time.
The maximum average diameter of sprouts per cutting
was noted under 2500 ppm concentration of IBA (3.66
mm) with November 15 planting time.
The maximum average number of sprouts (13.11) per
cutting was recorded under 500 ppm concentration of
IBA with January 15 planting time.
14. The maximum average number of leaves (35.55)
per cutting was produced by 2000 ppm
concentration of IBA with December 15 planting
time.
The maximum average fresh weight of shoot (8.05
g) value was shown by control with February 15
planting time.
The maximum average dry weight of shoot (4.88 g)
was noted under 3000 ppm concentration of IBA
with February 15 planting time.
15. The maximum percentage of rooting was produce
under1500 ppm and 3000 ppm IBA (100.00%) with
February 15 planting time.
The maximum average number of primary roots
(21.22) was produced by 4500 ppm concentration
of IBA with February 15 planting time.
The maximum average number of secondary roots
(8.25) were recorded under 2000 ppm
concentration of IBA with December 15 planting
time.
16. The maximum average length of root per cutting (15.32
cm) was produced under 5000 ppm concentration of
IBA with February 15 planting time.
The maximum average fresh weight of roots per cutting
(1.096 g) was produced by 3000 ppm concentration of
IBA with November 15 planting time.
The maximum average dry weight of roots (0.253 g)
per cutting was produce under 1000 ppm concentration
of IBA with February 15 planting time.
17. Conclusion
Among various concentration of IBA, 500 ppm
concentration of IBA shows the best performance
in terms of number of sprouted cutting, minimum
number of dead cutting without sprouting, number
of secondary root per cutting number of sprout per
cutting, minimum number of dead cutting after
sprouting and percentage of rooted cuttings, while
average length of root per cutting, average dry
weight of root was recorded under 5000 ppm
concentration of IBA. February 15 planting time
was found to be the most appropriate time of
rooting.
