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
Abstract
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.