AGRO 74 |
| Biological conversion of humic substances (HS) by microorganisms has been considered as a potential system for obtaining highly-effective microbial formulations. Low molecular weights and high water solubility are just a few positive traits of such beneficial microbial formulations. To reach this goal, consortia and pure cultures of natural microbial population from soil, biohumus and wood rot were isolated and application of different complementary techniques for the structural analysis of humic derivatives were used ( 13CNMR/UV/vis/FTIR spectroscopy, SEC, element analysis). Data obtained indicated a decrease in particle size and a loss in aromaticity and aliphatic carbon in HS reisolated from microbial cultures. The microbial degradation of HS strongly depended on the composition of the HS, the species selection of the microorganisms, and to a lesser extent on the culture conditions. Low molecular biosolubilized HS were displayed phytohormone-like activity. Acknowledgement. This research was supported by the grant of the ISTC KR-993.2. |
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New Developments and Issues in Agrochemical Sciences
8:00 AM-11:00 AM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Agrochemicals |