Response of Soybean [Glycine max (L.) Merrill] to Microbial Inoculation and Sulphur
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Date
2016
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Publisher
MPUAT, Udaipur
Abstract
A field experiment entitled “Response of Soybean [Glycine max (L.)
Merrill] to Microbial Inoculation and Sulphur” was conducted during Kharif 2015
at Instructional Farm, Department of Agronomy, Rajasthan College of Agriculture,
Udaipur. The objectives were, to assess the effect of microbial inoculants on yield and
quality, to study the effect of sulphur levels on yield and quality and to work out the
economics of the treatments. The treatments consisted of four microbial inoculation
(Control, Rhizobium, PSB and Rhizobium + PSB) and four sulphur levels (0, 20, 40
and 60 kg S ha-1). These sixteen treatments were replicated three times in Factorial
Randomized Block Design. The crop was sown on 16th July and harvested on 14th
October, 2015.
The results revealed that inoculation of seeds with Rhizobium, PSB and
Rhizobium + PSB, significantly improved growth parameters i.e. plant height at all
stage, dry matter accumulation at all stage (30, 60 DAS and at harvest), LAI at 50
DAS, chlorophyll content and primary branches plant-1 at harvest. However, the
increase in LAI and chlorophyll content with inoculation of Rhizobium was found at
par with PSB and yield parameters (number of pods plant-1, number of seeds pod-1,
seed yield g plant-1 and seed index) of soybean crop. Consequently inoculating seeds
with Rhizobium + PSB recorded higher productivity. However, the highest seed,
haulm and biological yield (1442.79, 3409.65 and 4852.62 kg ha-1) were obtained
with dual inoculation of Rhizobium + PSB, representing increase of 577.43, 1288.82
and 1866.68 kg ha-1 over no inoculation.
Inoculation of Rhizobium + PSB significantly increased N content in seed and
haulm. However, PSB and Rhizobium + PSB significantly increased P content in seed
and haulm. S content in seed and haulm significantly increased with inoculation of
Rhizobium + PSB over control. All the inoculants significantly increased N, P and S uptake by seed and haulm over no inoculation. Seed inoculation with Rhizobium +
PSB significantly improved protein content in seed and yield. However, oil content
of seeds was reduced significantly with Rhizobium + PSB but oil yield significantly
improved over control. The highest net return (( 35182 ha-1) with BC ratio (1.71)
were realized under dual inoculation.
Application of 40 kg S ha-1 significantly increased plant height and dry matter
accumulation at all stage (30, 60 DAS and at harvest) which was found at par with 60
kg S ha-1. Leaf area index failed to show significant variation whereas application of
60 kg S ha-1 significantly increased the chlorophyll content and primary branches
plant-1 over control. Application of 60 kg S ha-1 significantly increased the yield and
yield attributes of the crop in terms of number of pods plant-1, number of seeds pod-1,
seed yield g plant-1, seed index, seed yield (279.10 kg ha-1), haulm yield (385.10 kg
ha-1), biological yield (684.90 kg ha-1) and harvest index (7.09 per cent) over control
(1051.60, 2691.50, 3720.30 kg ha-1 and 28.20 per cent) respectively. The nutrient N
and P content in seed and haulm were highest recorded up to application of 60 kg S
ha-1 and S content in seed and haulm significantly improved over control. N, P and S
nutrient uptake by seed, haulm and total by crop were significantly increased with
application of 60 kg S ha-1 over control. The quality of seed estimated in terms of
protein content and yield, oil yield were also improved significantly up to application
of 60 kg S ha-1. The economic analysis indicate that application of 60 kg S ha-1 was
optimum dose as it fetched highest net returns of ( 30375 ha-1) and BC ratio (1.50)
compared to least net returns of ( 21071 ha-1) and BC ratio (1.00) in control.
The combined effect showed that seed inoculation with Rhizobium + PSB and
application of 60 kg S ha-1 recorded highest seed and haulm yield of 1533.33 and
3530.0 kg ha-1 with highest net returns and BC ratio of ( 37993 ha-1 and 1.82).
Description
Response of Soybean [Glycine max (L.) Merrill] to Microbial
Inoculation and Sulphur
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Citation
Nagar and Dashora, 2016