EFFECT OF GA3 AND GROWING MEDIA ON GERMINATION AND SEEDLING GROWTH OF JAMUN (Syzygium cumini L.) cv. LOCAL 2930
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Date
2019-08
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JAU, JUNAGADH
Abstract
The present investigation entitled “Effect of GA3 and growing media on
germination and seedling growth of jamun (Syzygium cumini L.) cv. Local” was
conducted at Fruit Research Station Lalbaug, Department of Horticulture, College of
Agriculture, JAU, Junagadh. The treatments comprised of different concentrations of
GA3 (G1: Water soaked, G2: GA3 300 ppm, G3: GA3 400 ppm and G4: GA3 500 ppm)
and different growing media [M1: Soil+ Cocopeat+ FYM (1:1:1), M2: Soil+
Cocopeat+ FYM (2:1:1), M3: Soil+ Cocopeat+ Vermicompost (1:1:1), M4: Soil+
Cocopeat+ Vermicompost (2:1:1)]. The experiment was laid out in Completely
Randomized Block Design (Factorial) with sixteen treatments combinations and three
repetitions each.
The treatment GA3 500 ppm (G4) had significant influence on different traits
like minimum days required for seed germination (9.25) and maximum germination
percentage (91.98%) of jamun. Among the different concentration of GA3, treatment
GA3 500 ppm (G4) had significant influence on different traits like maximum number
of leaves (5.55, 9.00, 10.23, 11.65 and 12.30), stem length of seedling (13.40 cm,
18.15 cm, 22.18 cm, 28.19 cm, and 35.43 cm) and stem girth of seedlings (1.90 mm,
2.09 mm, 2.41 mm, 2.81 mm and 3.31 mm) at 30, 60, 90, 120 and 150 DAS
respectively. Treatment GA3 500 ppm (G4) recorded the maximum root length (11.95
cm), seedling height (67.79 cm), fresh weight of shoot (15.76 g), dry weight of shoot
(4.56 g), fresh weight of root (5.53 g), dry weight of root (2.55 g), root-shoot fresh
weight ratio (0.59), root-shoot dry weight ratio (0.55), leaf area (13.20 cm
2
) and
maximum survival percentage (78.66%) of jamun.
The media consisting of M3 i.e., Soil+ Cocopeat+ Vermicompost (1:1:1) had
significant influence on different traits like minimum days required to seed germination (13.17 days) and it was at par with the treatment M4 (13.33) and
maximum germination percentage (78.41%) of in the specific cultivar of jamun. The
media M3 [Soil+ Cocopeat+ Vermicompost (1:1:1)] had significantly positive
influence on different traits like number of leaves (5.28, 8.50, 9.44, 10.52 and 11.73),
stem length (12.03 cm, 16.79 cm, 20.70 cm, 26.72 cm and 33.73 cm) and maximum
stem girth of seedlings (1.78 mm, 2.05 mm, 2.37 mm, 2.76 mm and 3.26) at 30, 60,
90, 120 and 150 DAS respectively of seedling. The M3 [Soil+ Cocopeat+
Vermicompost (1:1:1)] also recorded the maximum root length (30.57 cm), seedling
height (64.30 cm), fresh weight of shoot (13.32 g), dry weight of shoot (3.85 g), fresh
weight of root (4.47 g), dry weight of root (1.83 g), root-shoot fresh weight ratio
(0.64), root-shoot dry weight ratio (0.47), leaf area (13.15 cm
2
) and maximum
survival percentage (75.99%) of jamun seedling.
Among the interaction effect of GA3 concentrations and medias, treatment
combination of GA3 500 ppm with Soil+ Cocopeat+ Vermicompost (1:1:1) was found
to be better with respect to minimum days required to germination (7.67) and the
maximum germination percentage which was observed in G4M3 (93.90%). This
treatment also recorded the maximum number of leaves (6.33, 9.41, 11.35, 12.58 and
13.58), stem length of (14.39 cm, 19.39 cm, 23.42 cm, 29.47 cm and 36.54 cm) and
maximum stem girth of (2.02 mm, 2.26 mm, 2.66 mm, 3.06 mm and 3.56 mm) at 30,
60, 90, 120 and 150 DAS respectively in seedling. Similarly, maximum seedling
height (70.09 cm), fresh weight of shoot (16.26 g), dry weight of shoot (5.04 g), fresh
weight of root (6.04 g), dry weight of root (3.05 g), root-shoot dry weight ratio (0.60),
leaf area (13.59 cm2
) and maximum survival percentage (84.44%) of jamun cv. Local
was recorded in the treatment combination of G4M3.
Hence from the research concluded for enhancing seed germination and
seedling growth of jamun cv. Local, GA3 (500 ppm) and Soil+ Cocopeat+
Vermicompost (1:1:1) alone or in combination could be advised