Resumen

ZUNIGA E., Orlando; JIMENEZ A., Cristian O.; BENAVIDES B., Jhony A.  y  TORRES GONZALEZ, Celina. Effect of Electromagnetic Fields on Microbial Activity of a Bio-Fertilizer. rev. cienc. [online]. 2016, vol.20, n.1, pp.27-40. ISSN 0121-1935.

The level of microbial activity was evaluated in an organic substrate and over soil samples from the "El Limonar" county (Dagua, Valle del Cauca) to which it was applied the commercial bio-fertilizer Multibiol® electromagnetically stimulated. Phase I of the experiment was conducted to determine the best times of exposure and electromagnetic induction on the bio-fertilizer applied to samples of an organic substrate (chicken manure). In phase II the best treatments for electromagnetic induction and the exposure times obtained in Phase I were applied to soil samples. For electromagnetic stimulation of bio-fertilizer a solenoid installed in a recirculation circuit was used. The results of phase I indicated that a 25 mT electromagnetic induction resulted in a statistically signif cant microbial activity in the organic substrate, however, the exposure times did not have statistically signif cant difference in this phase, therefore was used a constant electromagnetic induction of 25 mT and the three exposure times (7l, 15 and 30 minutes) to be evaluated on the soil under greenhouse conditions in phase II, f nding a statistically signif cant difference in the shortest exposure time, that is at 7 l minutes. These results offer new possibilities for the application of bio-fertilizer electromagnetically stimulated in order to be applied to agricultural soils, thus enabling a gradual improvement in the benef cial soil microbial population and consequently on plant production

Palabras clave : Bio-electromagnetics; agro-environmental technology; microbial activity; soil.

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