A calorimetric analysis of soil treated with effective microorganisms

Authors
Sigstad, Emma Elizabeth; Schabes, Fanny Isabel; Tejerina, Facundo
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
Effective microorganisms or EM is a consortium of beneficial microorganisms (primarily photosyntheticand lactic acid bacteria, yeast, actinomycetes, and fermenting fungi) that can be applied as inoculants toincrease the microbial diversity of soil. Two fields of sugar cane in the province of Tucumán, Argentinawere treated with either EM containing brewery fermentation tank residual yeast (YS) or just EM (NYS).The outcome was 1000 kg Ha−1 less of sugar cane harvested from YS field. The aim of this work was toanalyze both soils to find out if calorimetry could assess the negative effect of yeast. Mass specific thermalpower?time curves were obtained during 100 or more h of measurement. Once a day, a vial containingNaOH solution was introduced into the calorimetric ampoule to determine CO2 evolution. A plot of logSMB (soil microbial biomass) as a function of log p gave a similar relation as previously reported for thosesamples that showed an energy expenditure of 16?22 J cm−3 CO2 respired. Thus, soil microbial biomasscould be determined during microbial growth. Results showed that yeast suppressed the activity of partof the soil microorganisms. Also, soil microbial activity increased with time in NYS due to successiveapplications of EM.
Fil: Sigstad, Emma Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
Fil: Schabes, Fanny Isabel. Universidad Nacional de Tucumán; Argentina
Fil: Tejerina, Facundo. Universidad Nacional de Tucumán; Argentina
Subject
Calorimetry
Effective microorganisms
Soil microbial activity
Soil microbial biomass
Otras Ciencias Químicas
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/77658