EFFECTS OF ORGANIC ACID ON SILAGE FERMENTATION AND AEROBIC STABILITY OF WET BREWER'S GRAIN AT DIFFERENT TEMPERATURES

Abstract

COSKUNTUNA, L., F. KOC, M. LEVENT OZDUVEN and A. COSKUNTUNA, 2010. Effects of organic acid on silage fermentation and aerobic stability of wet brewer’s grain at different temperatures. Bulg. J. Agric. Sci., 16: 651-658 The purpose of this research was to study the effect of organic acid on silage microbiology and aerobic stability of wet brewer’s grain silages at different temperatures. The silage samples ensiled in 1.0 l anaerobic jars, with and without an organic acid, at room (20 o C) or elevated temperatures (30-37 ° C). After 45 days of ensiling, the silages were subjected to an aerobic stability test and room and elevated (30-37 ° C) temperatures.. Samples incubated at 20-30 ° C had the highest yeast and mould count, most profilic CO 2 production. The duration of exposure had a significant effect on aerobic stability, especially at 30 ° C. As a result, organic acid showed a high antibacterial activity in wet brewer’s grain silages. During the 45 days anaerobic period, organic acid decreased yeast and moulds populations, moreover improved aerobic stability at 37 ° C