AUGMENTATION OF PLANT GROWTH PROMOTING MICROORGANISMS THROUGH FERMENTATION OF COW DUNG AND COW URINE

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Date
40608
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University of Agricultural Sciences GKVK, Bangalore
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Panchagavya was a product prepared by using cow dung, ghee, milk, curd and cow urine. The microbiological quality of the fermented cow products was analysed. Fermentation of the cow products for over a period of 30 days showed varied microbial population built up. The total bacterial population was maximum at 10th day similarly all the groups of bacteria, namely fungi, actinomycetes including nitrogen fixing and phosphate solubilising bacteria were high and further fermentation reduced the population of all the groups of bacteria. The microbial quality was high in the products developed with cow dung, ghee, urine, milk and curd and further enhancement of the microbial diversity and population was improved by blending with legume flour and jaggery. Bacterial isolates were shown to cellulolytic, pectinolytic, nitrogen fixing and phosphate solubilizers. Sixteen bacterial isolates selected for further studies, nine have shown amylolytic activity, eight have shown cellulolytic activity, two have shown pectinolytic activity, six have shown phosphate solubilization and nine have shown nitrogen fixation. All the isolates showed the production of gibberellic acid by starch agar halo bioassay. The panchagavya with or without legume flour and jaggery showed highest actinomycetes population throughout the fermentation. The bacterial isolates from fermented cow products were screened for starch, nitrogen fixation and phosphate solubilization activity by growing on starch agar, Waksman 77 media and Pikovskaya media respectively. For green house experiments using aerobic rice, cow pea and sunflower, application of panchagavya alone or blended with legume flour and jaggery was found to be equivalent to that of recommended fertilizer levels in all the growth parameters like plant height and total dry matter production. However other cow products individually were found to be better than control in improving the plant growth and biomass production.
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