EVALUATION OF MICROBIALLY ENRICHED SPENT MUSHROOM SUBSTRATE FOR CROP GROWTH
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Date
2018-12-15
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UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU
Abstract
nvestigation using paddy straw, sugarcane trash and their combination as
substrates for the cultivation of oyster and milky mushroom species was carried out.
Early bud initiation was observed in paddy straw substrate (17.83 days) followed by the
combination of paddy straw and sugarcane trash (23.16 days). The highest yield in oyster
mushroom species Hypsizygus ulmarius (524.33 g/bag), Pleurotus eous (411.83 g/bag)
and Pleurotus florida (396.00 g/bag) was observed on paddy straw substrate whereas, in
milky mushroom (Calocybe indica) combination of paddy straw and sugarcane trash
recorded highest yield (446.50 g/bag) and bio-efficiency (111.63 per cent). Spent
mushroom substrate obtained after mushroom cultivation was analysed for nutrient
content and it showed increase in the N P K content and narrow C:N ratio in the spent
mushroom substrate over the initial observations. Spent mushroom substrates were
enriched with plant growth promoting microorganisms (Pseudomonas fluorescens,
Bacillus megaterium and Trichoderma harzianum). Trichoderma harzianum showed
better survivability in mushroom spent substrate. Microbially enriched spent mushroom
substrate application had positive effect on the overall growth parameters and yield of the
Capsicum annum and Phaseolus vulgaris. Plant growth parameters (plant height, number
of leaves, number of branches) shoot biomass, root biomass, number of flowers and yield
parameters (number of fruits, fruit diameter and fruit yield) found to be maximum in the
treatment Talc + Consortia inoculum followed by in the Milky SMS based consortia and
oyster SMS based Consortia inoculum. In both the crops N, P and K content and uptake
was significantly varied among the treatment as influenced by the application of
microbially enriched spent mushroom substrate.