EFFECT OF SPACING AND NITROGEN ON GROWTH AND YIELD OF GOMPHRENA (Gomphrena globosa L.) 3358
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Date
2021-09
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JAU JUNAADH
Abstract
Gomphrena, Spacing, Nitrogen
The present experiment entitled “Effect of spacing and nitrogen on growth and
yield of gomphrena (Gomphrena globosa L.)” was conducted at the Fruit Research
Station, Jambuvadi Farm, Department of Horticulture, Junagadh Agricultural
University, Junagadh during summer season of the year 2020-21.
Twelve treatment combination arising from three levels of spacing viz. 20 x 10
cm (S₁), 20 x 15 cm (S₂), 20 x 20 cm (S₃) and four levels of nitrogen i.e. 00 kg ha-1
(N₁), 50 kg ha-1
(N₂), 75 kg ha-1
(N₃) and 100 kg ha-1
(N₄) were allocated in
Randomized Block Design (RBD) with factorial concept in three replication.
Growth, flowering, yield and nutrient content of gomphrena were influenced by
different levels of spacing. Maximum plant height was recorded at 30 DAP (36.25
cm), 60 DAP (63.84 cm) and 90 DAP (81.66 cm), flower yield per plot (2962.69 g),
flower yield (13.68 t/ha), uptake of nitrogen by plant (214.20 g/plant) in 20 x 10 cm
(S₁) spacing, while maximum plant spread (N-S) was recorded at 30 DAP (19.76 cm),
60 DAP (29.47 cm) and 90 DAP (36.50 cm) and plant spread (E-W) was recorded at
30 DAP (24.24 cm), 60 DAP (34.44 cm) and 90 DAP (53.61 cm), minimum number
of days taken to flower bud initiation (23.16 days), minimum number of days taken
for first flower (30.73 days) in 20 x 20 cm (S₃) spacing. The maximum number of
primary branches per plant at 50% flowering (8.11) and at full bloom (11.53),
maximum days of flower span (78.50 days), fresh weight of plant (489.37 g), dry
weight of plant (128.15 g), chlorophyll content (46.37 SPAD), shelf life (28.01 days),
number of flowers per plant (139.54), weight of flowers per plant (109.90 g), fresh
weight of 100 flowers (79.59 g), dry weight of hundred flowers (36.41 g), available
nitrogen content in soil (258 kg ha-1
), nitrogen content from plant (2.27 per cent) were
recorded in 20 x 20 cm (S₃) spacing.
All the parameters like growth, flowering, yield and nutrient content were
significantly influenced by different levels of nitrogen. Maximum plant height was
recorded at 30 DAP (34.33 cm), 60 DAP (60.32 cm) and 90 DAP (78.76 cm), plant
spread (N-S) at 30 DAP (18.47 cm), 60 DAP (26.97 cm) and 90 DAP (35.26 cm) and
plant spread (E-W) at 30 DAP (21.98 cm), 60 DAP (31.93 cm) and 90 DAP (49.38
cm), number of primary branches per plant at 50% flowering (8.20) and full bloom
(11.33), days of flower span (82.83 days), chlorophyll content (46.62 SPAD), shelf
life (28.51 days), fresh weight of 100 flowers (75.78 g), dry weight of hundred flowers
(33.72 g), available nitrogen content in soil (280 kg ha-1
), maximum nitrogen content
from plant (2.54 per cent), uptake of nitrogen by plant (237.65 g/plant) were observed
in 100 kg N ha-1
(N4) treatment, while maximum number of flowers per plant
(133.14), weight of flowers per plant (101.21 g), flower yield per plot (3018.12 g),
flower yield (13.94 t/ha) were significant higher in application of 75 kg N ha-1
(N₃)
treatment.
From the economic point of view, planting of gomphrena at 20 x 10 cm (S₁)
spacing was found most profitable as it recorded the highest net income (Rs. 81,365
ha-1
) with highest BCR (1.46) and the application of nitrogen @ 75 kg N ha-1
(half
dose as basal and remaining half dose of 45 DAP) was found most profitable as it
recorded the highest net income (Rs.78,513 ha-1
) with highest BCR (1.28) in
gomphrena under South Saurastra region.