COMPREHENSIVE STUDY ON POPULATION DYNAMICS OFMICROBIAL ENRICHMENT OF ORGANIC MANURESK. Udhaya Kumar, N. Jeyapandiyan, R. Susan Poonguzhali, R. Vinu Radha and C. Jayapradha
An experiment was conducted in Department of Agriculture, Karunya Institute of Technology and Sciences,Coimbatore to study the population dynamics of microbially enriched organic manures and their nutrientcomposition. Organic manures such as vermicompost, FYM, and coir pith compost were enriched with thelignite based microbial strains of Rhizobium leguminosorum, Bacillus megatherium and its combined inoculumat a rate of 1 kg per ton of manure and its moisture content was maintained at 50 per cent and incubated for180 days. After their enrichment, the microbial load in the organic manures was enumerated using thestandard plate count technique. The microbial results revealed that the maximum microbial populationwas attained on the 90th day after enrichment. The total microbial population in combined bio fertilizers(Rhizobium and Phosphobacteria) inoculated vermicompost was high during the initial phases and thentotal microbial population declined towards the end. Among the enriched organic manures, the highestpopulation was observed in combined microbial strains enriched with vermicompost (6.52 log10 CFU g-1)whereas, after 3 months the enriched organic manure shows the very less population density.