Evaluation of thermophilic fungal consortium for paddy straw composting |
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Authors: | Adesh Kumar Sunita Gaind Lata Nain |
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Institution: | (1) Division of Microbiology, Indian Agricultural Research Institute, New Delhi, 110012, India |
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Abstract: | Out of 10 thermophilic fungi isolated from wheat straw, farm yard manure, and soil, only three showed highest cellobiase,
carboxymethyl cellulase, xylanase, and FPase activities. They were identified as Aspergillus nidulans (Th4), Scytalidium thermophilum (Th5), and Humicola sp. (Th10). A fungal consortium of these three fungi was used to compost a mixture (1:1) of silica rich paddy straw and lignin rich
soybean trash. The composting of paddy straw for 3 months, during summer period in North India, resulted in a product with
C:N ratio 9.5:1, available phosphorus 0.042% and fungal biomass 6.512 mg of N-acetyl glucosamine/100 mg of compost. However, a C:N ratio of 10.2:1 and highest humus content of 3.3% was achieved with
1:1 mixture of paddy straw and soybean trash. The fungal consortium was effective in converting high silica paddy straw into
nutritionally rich compost thereby leading to economical and environment friendly disposal of this crop residue. |
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Keywords: | Carboxymethyl cellulase Cellobiase Filter paper activity Farm yard manure Paddy straw Soybean trash Xylanase |
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