EFFECT OF PLANT SPACING AND GA3 APPLICATION ON SEED YIELD AND QUALITY OF SWEET WILLIAM (Dianthus barbatus L.)
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Date
2017
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled, “Effect of plant spacing and GA3 application on
seed yield and quality of sweet william (Dianthus barbatus L.)” was carried out at the Khaltoo
experimental farm of Department of Seed Science & Technology, Dr Yashwant Singh Parmar University
of Horticulture and Forestry, Nauni, Solan (HP) during 2015 to 2017. The experiment was laid out in
RBD (Factorial) with 12 treatment combinations of four levels of spacing i.e. S1 (30 × 30 cm), S2 (30 ×
25 cm), S3 (30 × 20 cm) and S4 (20 × 20 cm) and three doses of GA3 i.e. G0 (0 ppm), G1 (50 ppm) and G2
(100 ppm) replicated thrice. Among different levels of spacing, S1 (30 × 30 cm) recorded maximum
values for days taken to first flowering (131.67 days), plant spread (38.78 cm), number of flowers per
plant (106.11), size of flowers (1.86 cm), duration of flowering (39.11 days), number of capsules per
plant (67.84), number of seeds per capsule (48.67), seed yield per plant (4.57 g), 1000 seed weight (0.99
g), germination percentage (88.67 %), seedling length (7.45 cm), seedling dry weight (4.81 mg), seed
vigour index-I (662.72) and seed vigour index-II (428.84). Whereas, spacing S4 (20 × 20 cm) recorded
maximum values for plant height (46.07 cm), number of flowers per plot (2600.00) and seed yield per
plot (107.18 g). The application of GA3 @ 100 ppm resulted in highest values for plant height (42.67
cm), plant spread (36.54 cm), number of flowers per plant (96.75), number of flowers per plot (2349.75),
size of flowers (1.83 cm), duration of flowering (36.75 days), number of capsules per plant (62.67),
number of seeds per capsule (46.49), seed yield per plant (4.08 g), seed yield per plot (99.66 g), 1000
seed weight (0.96 g), germination percentage (86.25 %), seedling length (7.11 cm), seedling dry weight
(4.68 mg), seed vigour index-I (617.28) and seed vigour index-II (406.13). The interaction, S1 × G2 i.e. a
plant spacing of 30 × 30 cm along with application of 100 ppm GA3 recorded maximum values in terms
of most of the growth, flowering, seed yield per plant and seed quality parameters. However, maximum
seed yield per plot was found under the interaction S4 × G2 i.e. when spacing was kept 20 × 20 cm apart
with the application of GA3 @ 100 ppm, but the effects were found to be non significant. So, it is
concluded that for better growth, flowering, maximum seed yield and quality, the plants be spaced at 30
× 30 cm a part along with the application of GA3 @ 100 ppm.
Description
HORTICULTURE
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