Cambios en el porcentaje de sodio intercambiable (PSI) y la relación de absorción de sodio (RAS) de un suelo y su influencia en la actividad y biomasa microbiana

to evaluate changes in esp, sar and its influence on the activity and soil microbial biomass, different concentrations of vinasse from the fuel ethanol industry as an amendment were applied on a soil affected by sodicity with strong physical, chemical and biological limitations. a randomized complete block design was used involving four treatments and three replications, which included soil sampling at the beginning and the end of the process at three different depths (0-20, 20-40 and 40-60 cm). variables measured were respiration, microbial biomass c, om%, ph, cic, ec, sar and esp. biological activity (co2) and microbial biomass, c showed a significant increase in the ideal range for planting of sugar cane crop.