Physical-chemical and microbiological aspects of soybean grain treated with organic acid and their salts

This research had the objective to evaluate microbiological and physical-chemical parameters of deactivated soybean grain (Glycine max L.) treated with three different dosages (2, 4 and 6L t(-1)) of organic acids and their salt mixture (AOS), as an antifungical additive. The assay had a duration of 90 days, where executed fungi count (UFC g(-1)), fungi specie identification, humidity (U), activity of water (AA), peroxide value (IP) and acidity value (IA). The analyses were carried out in triplicate, in intervals of 15 days among analysis, until 60(th) day of evaluation and, at the 90(th) day of evaluation. There were increases in the UFC g(-1) in dosages of 2 and 4L t(-1,) as well a change in fungi species found in these treatment at each evaluation, distinguished of low UFC g(-1) and fungi species in dosage of 6L t(-1.) The values of U and AA were above of recommended patterns of 14% and 0.70, respectively for all treatments and evaluations. The IP increased significative from 45(th) day of evaluation in control and from 60(th) day in other treatments. The IA had no significative from 45(th) day of evaluation in control and from 60(th) day in other treatments. The IA had no significative variation during the period of evaluation. The dosage of 6L t(-1) was efficient in the antifungical protection of this raw material.