EFFECT OF TIME OF SOWING AND CHEMICAL TREATMENTS ON SEED GERMINATION AND SEEDLING GROWTH OF CUSTARD APPLE (Annona squamosa L.) CV. SINDHAN 2845
Loading...
Files
Date
2019-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
JAU, JUNAGADH
Abstract
An experiment was conducted at Lalbaug, Fruit Research Station, Department
of Horticulture, College of Agriculture, Junagadh Agriculture University, Junagadh
during the year of 2018 with a view to study the “Effect of time of sowing and
chemical treatments on seed germination and seedling growth of custard apple
(Annona squamosa L.) cv. Sindhan”.
The experiment laid out in Completely Randomized Design with three
replications. The treatments comprised of three different levels of time of sowing (S)
viz., S1 - 15th April, S2 - 15th
May; S3 - 15th June and seeds were treated with six
different levels of chemicals (M) viz., M1 - Control, M2 - GA3 200 ppm soaking for 24
hours, M3 - Concentrated H2SO4 0.1% soaking for 2 minutes, M4 - Concentrated HCl
0.1% soaking for 2 minutes, M5 - Cow dung and Cow urine slurry (1:2 ratio) soaking
for 24 hours and M6 - Hot water (50 to 60˚C) soaking for 24 hours.
The results on the effect of time of sowing indicted that custard apple seed
sowing at 15th April (S1) executed significantly the lowest days taken for germination
(17.64 days) and maximum seedling vigour index - I (3779.31 cm). Growth
parameters were also significantly influenced by S1 - 15th April. It was recorded
significantly maximum height of seedling (20.2, 39.01 and 50.01 cm), stem girth
(2.39, 3.20 and 4.10 mm) and number of leaves (5.26, 11.32 and 17.51) at 60, 90 and
120 DAS, respectively. Maximum shoot length (33.31 cm), longest root length (16.70 cm), number of roots (11.02) and fresh weight of shoot (5.90 g) at 120 DAS was
observed in S1 - 15th April.
The result on the effect of different chemical treatments indicated that the M2 -
GA3 200 ppm soaking for 24 hours executed minimum days required for germination
(16.48 days) and significantly maximum seedling vigour index- I (4774.02 cm).
Growth parameters were also significantly influenced by M2 that maximum height of
seedling (22.53, 45.00 and 53.82 cm), stem girth (2.48, 3.58 and 4.49 mm) and
number of leaves (6.94, 12.90 and 19.10) at 60, 90 and 120 DAS respectively.
Maximum shoot length (36.83 cm), root length (16.99 cm), number of roots (11.57)
and fresh weight of shoot (6.55 g) at 120 DAS was observed in M2. Highest root:
shoot ratio (0.25) was observed in M3.
Interaction effect of time of sowing and chemical treatments was found
significant on germination parameters. The maximum seed germination percentage
(90.33 %), minimum seed germination span (22.13 days), significantly highest
germination index (4.23) and significantly maximum vigour index - II (386.02 g)
were observed in S1M2. Growth parameters were also significantly influenced by
S1M2 treatment combinations. The maximum leaf area (13.03 cm2
), fresh weight of
root (1.60 g), dry weight of shoot (3.93 g), dry weight of root (0.29 g) and highest
percentage of survival (89.00 %) were found with S1M2.
Hence, to raise custard apple seed in net house, it should be sown on 15th April
with soaking treatment in GA3 200 ppm for 24 hours to attain better seed germination
and seedling growth of custard apple cv. Sindhan.