EFFECT OF SULPHUR SOURCES AND SULPHUR OXIDIZING BACTERIA (SOB) ON YIELD, QUALITY AND NUTRIENTS UPTAKE BY SUMMER SOYBEAN 3719
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Date
2023-07
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JAU JUNAGADH
Abstract
Soybean, sulphur, SOB, yield, quality, nutrients content and uptake,
available nutrients
A field experiment entitled “Effect of sulphur sources and sulphur oxidizing
bacteria (SOB) on yield, quality and nutrients uptake by summer soybean” was
conducted on medium black calcareous soil at Instructional Farm, Krishigadh,
Junagadh Agricultural University, Junagadh (Gujarat) during summer season of 2022.
The field experiment was comprising of three sources of sulphur viz., Gypsum (SS1),
Elemental sulphur (SS2) and Cosavet (fertis) (SS3) and sulphur oxidizing bacteria
(SOB) viz., 0.0 lit ha-1
(SOB1), 2.0 lit ha-1
(SOB2), 3.0 lit ha-1
(SOB3) and 4.0 lit ha-1
(SOB4) in randomized block design (Factorial) repeated thrice were tested in the
experiment, in respect of growth parameters, yield, yield attributes, content and uptake
of nutrients like N, P, K and S at 30 DAS, 60 DAS and at harvest in stover and seed of
soybean crop, status of soil available nutrients viz., N, P2O5, K2O and S at 30 DAS, 60
DAS and at harvest as well as bacterial population in soil at 30 DAS, 60 DAS and at
harvest of crop. The experimental soil was medium black calcareous, clayey and
slightly alkaline in reaction with pH2.5 8.2, EC2.5 0.3 dS m-1
. The soil was low in
available nitrogen (230.00 kg ha-1
), medium in available phosphorus (32.50 kg ha-1
),
medium in available potassium (280.00 kg ha-1
) and low in available sulphur (9.55
ppm).
The results revealed that growth parameters, yield, yield attributes, quality
parameters and nutrients content and uptake were significantly influenced by the
different sources of sulphur and sulphur oxidizing bacteria (SOB). The results of
experiment indicated that plant height, number of pods per plant, dry matter yield at 30
DAS, 60 DAS and at harvest, seed and stover yield were observed maximum with
application of cosavet (fertis). Similar trend also observed in case of quality parameters
ABSTRACT
like, protein and oil content. The nitrogen content in seed and sulphur content in seed
and plant at 30 DAS, 60 DAS and at harvest, uptake of nitrogen, phosphorus, potassium
and sulphur by seed and stover at 30 DAS, 60 DAS and at harvest significantly
increased with application of cosavet (fertis) as a source of sulphur. The number of
seeds per pod, phosphorus and potassium content in seed, nitrogen, phosphorus and
potassium content in plant at 30 DAS, 60 DAS and at harvest did not influence by
different sources of sulphur. The effect of sulphur sources on available nitrogen,
phosphorus and potassium in soil did not produce any significance influence at 30 DAS,
60 DAS and at harvest of soybean. Availability of sulphur in soil significantly increased
by application of cosavet (fertis).
The application of SOB @ 3 lit ha-1
significantly increased the plant height,
number of pods per plant, dry matter yield, seed and stover yield as well as protein and
oil content. However, days to 50 % flowering and number of seeds per pod did not
influence by SOB application. Application of SOB produced significantly favourable
effect on nitrogen content in seed, sulphur content in seed and plant at 30 DAS, 60 DAS
and at harvest of soybean. Significantly higher values of all these parameters were
observed with application of SOB @ 3 lit ha-1
. While, SOB application did not exert
any significant effect on phosphorus and potassium content in seed as well as nitrogen,
phosphorus and potassium content in plant at 30 DAS, 60 DAS and at harvest of
soybean crop. Application of SOB @ 3 lit ha-1
also significantly increase the uptake of
nitrogen, phosphorus, potassium and sulphur by seed and stover of soybean crop. The
available nitrogen, phosphorus and potassium in the soil at 30 DAS, 60 DAS and at
harvest of soybean were remains unaffected under the different levels of SOB. While
the available sulphur in soil at 30 DAS, 60 DAS and at harvest significantly increase
with application of SOB @ 3 lit ha-1
.
Application of SOB significantly increased the population of sulphur oxidizers
at 30 DAS, 60 DAS and at harvest in soil, While, in case of different sources of sulphur
did not produce any significant effect on population of sulphur oxidizers in soil at 30
DAS, 60 DAS and at harvest of soybean crop.
The interaction effect of sulphur sources and SOB were found non-significant
with respect of all growth parameters, yield, yield attributes, quality parameters, content
and uptake of nutrients by plant at harvest, available N, P2O5, K2O and S at 30 DAS,
60 DAS and at harvest as well as sulphur oxidizing population in soil at 30 DAS, 60
DAS and at harvest of soybean.
The quantitatively highest yield of soybean can be achieved by application of
cosavest (fertis) @ 20 kg ha-1
and SOB @ 3 lit ha-1
in the medium black calcareous
soils of South Saurashtra region of Gujarat.