“EFFECT OF BIO-STIMULANTS ON GROWTH, YIELD AND QUALITY OF OKRA (Abelmoschus esculentus L. Moench)” 3364
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Date
2021-09
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JAU JUNAGADH
Abstract
The present investigation entitled “Effect of bio-stimulants on growth, yield
and quality of okra (Abelmoschus esculentus L. Moench)” was conducted at
Polytechnic in Horticulture, Junagadh Agricultural University, Junagadh during the
year 2019 in Kharif season. Total sixteen treatments combinations of two varieties
viz., GJO 3 (V1), GO 6 (V2), four bio-stimulants alone viz., Novel @ 1% (B1),
Seaweed extract @ 2.5% (B2), Panchagavya @ 3% (B3), Jivamrut @ 500 l/ha (B4)
and in combination viz., Novel @ 1% + Panchagavya @ 3% (B5), Seaweed extract @
2.5% + Panchagavya @ 3% (B6), Panchagavya @ 3% + Jivamrut @ 500 l/ha (B7),
Novel @ 1% + Panchagavya @ 3% + Jivamrut @ 500 l/ha (B8) were laid out in
Factorial Randomized Block Design (FRBD) with three replications.
The results showed that variety GO 6 (V2) recorded highest leaf area index
(2.25), maximum fruit length (11.23 cm), maximum marketable fruit yield (3.40
kg/net plot), highest marketable fruit yield (11.79 t/ha), highest chlorophyll content
(28.97 SPAD) and minimum crude fiber content (32.64 %). However, variety GJO 3
recorded maximum ascorbic acid (16.72 mg/100 g). Varieties were found non significant in growth parameters viz., plant height, number of primary branches, days
to 50 % flowering and number of flowering nodes and yield parameters viz., fruit
diameter, number of fruits per plant, number of pickings and weight of fruit.
In case of bio-stimulants, application of Novel @ 1% + Panchagavya @ 3% +
Jivamrut @ 500 l/ha (B8) perceived maximum plant height (193.80 cm), maximum
number of primary branches (3.47), minimum days to 50 % flowering (44.83 days),
highest number of flowering nodes (5.77), highest leaf area index (2.32), maximum
fruit length (11.53 cm), highest number of fruits per plant (17.07), highest number of
pickings (14.03), maximum weight of fruit (17.34 g), maximum marketable yield
(4.01 kg/net plot) (13.94 t/ha), highest chlorophyll content (36.03 SPAD) and
maximum ascorbic acid (21.70 mg/100 g). Only, crude fiber content was found better
in Jivamrut @ 500 l/ha (B4) (30.27 %).
The interaction effect of variety GO 6 and bio-stimulant application Seaweed
Extract @ 2.5% and Panchagavya @ 3% (V2B6) noted maximum fruit length (12.07
cm), variety GO 6 and bio-stimulant application of Novel @ 1% + Panchagavya @
3% + Jivamrut @ 500 l/ha (V2B8) exhibited maximum chlorophyll content (37.63
SPAD). The interaction effect between variety GJO 3 and bio-stimulant application of
Panchagavya @ 3% + Novel @ 1% + Jivamrut @ 500 l/ha (V1B8) improved ascorbic
acid (21.94 mg/100 g) and minimum crude fiber content was observed in variety
GO 6 and Jivamrut @ 500 l/ha (V2B4) (28.79 %). The interaction effect was found
non-significant in all growth parameters as well as yield parameters except leaf area
index and fruit length. Also, the worked-out economics revealed that highest BCR
was in variety GO 6 (V2) (1.31) and bio- stimulants application of Novel @ 1% +
Panchagavya @ 3% + Jivamrut @ 500 l/ha (B8) (1.71).
On the basis of results obtained from the present investigation, it can be
concluded that variety GO 6 found better in marketable fruit yield and bio-stimulants
foliar application of Novel @ 1% and Panchagavya @ 3% just after initiation of
flowering at 15 days interval and soil application of Jivamrut @ 500 l/ha at sowing
onwards 30 days interval has been found effective with regard to growth parameters
viz., plant height, number of primary branches, days to 50 % flowering, number of
flowering nodes and leaf area index; yield parameters viz., fruit length, number of
fruits per plant, number of pickings, weight of fruit and marketable yield. Also, the
net return and benefit cost ratio obtained higher in variety GO 6 and bio-stimulants
Novel @ 1% + Panchagavya @ 3% + Jivamrut @ 500 l/ha