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International Journal of Agricultural Research
Year: 2011  |  Volume: 6  |  Issue: 2  |  Page No.: 172 - 179

Substrate Induced Respiration and Soluble Crude Protein Production by Soil Mycobiota Involved in the Decomposition of Sesbania aculeata L.

Ravindra Kumar, Asha Sinha, Seweta Srivastava and Manisha Srivastava    

Abstract: The aim of the present study was to determine the decomposition rate of Sesbania aculeata L. by CO2 evolution and to estimate Soluble Crude Protein (SCP) production by dominant decomposing mycoflora of Sesbania aculeata L. Eight dominant decomposing mycobiota were selected for the study. In the substrate induced respiration the significant difference was observed in both sterilized and unsterilized substrate with the test fungi. The maximum CO2 evolution was observed with Aspergillus niger in sterilized (16.04 μg day-1) and unsterilized green manure (18.92 μg day-1). In other experiment conducted for the estimation of soluble crude protein production Penicillium citrinum has produced maximum SCP (26.54%) at 25°C followed by Trichoderma harzianum, Aspergillus niger and Curvularia lunata whereas minimum soluble crude protein production was observed in Penicillium rubrum (8.46%) at 35°C. The maximum per cent biomass reduction observed by Aspergillus niger (28.60%) at 25°C and minimum was found in Penicillium rubrum (3.80%) at 35°C. Among seven different nitrogen sources tested against Penicillium citrinum, the highest producer of SCP, potassium nitrate was found to be the best for maximum SCP production (26.54%) whereas the least suitable nitrogen source for SCP production by Penicillium citrinum was recorded to be sodium nitrate (14.85%).

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