The effect of applying lactic acid bacteria at ensiling on the aerobic stability of silages

Abstract

T h e effect of applying commercial lactic acid bacteria inoculants at ensiling on the aerobic stability of silages was studied under laboratory conditions. T h e silages used were wheat, hedysarum, corn and various sorghum cultivars at various stages of maturity. T h r e e inoculants were used, two containing Lactobacillus plantarum, Enterococcus faecium and Pediococcus acidilactici (HIM F, Medipharm, USA and SiI-All, Alltech, U K ) and one containing Ent. faecium (Lacticil, M74, Medipharm, Sweden). T h e inoculants were applied a t 0.5 x lo6 cfu g-'. Silages with no additives served as controls. After treatment, the chopped forages were ensiled in 1.5 1 anaerobic jars; there were six jars per treatment. After ensiling for 45 d, the silages were tested for aerobic stability in a test in which CO, production was measured along with chemical and microbiological parameters.T h e inoculated silages that spoiled upon aerobic exposure faster than the controls were those of wheat and of the sorghum cultivar FS5 at the milk stage of maturity. This was evident from intensive CO, production and development of yeasts and moulds. Regression analysis indicated that aerobic deterioration of inoculated silages was associated with high levels of residual water-soluble carbohydrates and lactic acid and lack of volatile fatty acids. Aerobic spoilage of inoculated silages was attributed mainly to yeast activity.

The Effects of Adding Lactic Acid Bacteria and Cellulase in Oil Palm(Elais GuineensisJacq.) Frond Silages on Fermentation Quality, Chemical Composition and in Vitro Digestibility

“…<0.20 (Lima et al, 2011). Therefore, it may be speculated that the aerobic stability (Weinberg et al, 1993;Kung and Ranjit, 2001;Danner et al, 2003) of all silages can be disputed. The relative high proportions of acetic acid are difficult to explain but they may be related to a relative lack of rapid fermentable carbohydrates in OPF.…”

Production of 3-Hydroxypropionaldehyde in Silage Inoculated withLactobacillus coryniformisPlus Glycerol

“…4) Silage of high fermentation quality often permits the growth of spoilage yeasts due to lack of large amounts of VFAs. 5) Thus, it is difficult to prevent aerobic spoilage of silage of high fermentation quality.…”

Effects of bacterial inoculation on the fermentation characteristics and aerobic stability of ensiled whole plant soybeans (<i>Glycine max</i> (L.) Merr.)

“…Higher CO 2 production in silage indicates the activity of yeasts and moulds, which cause a rise in temperature and reduce the quality of silage (Woolford, 1990;Ashbell et al, 1991). Weinberg et al (1993) concluded that residual WSC and LA were both substrates for yeast and mould growth, and that AA inhibited the growth of these organisms. The aerobic stability of the control soybean silage was poor, based on the intensive CO 2 production, increases in pH, and a rise in temperature and yeast and mould populations, compared with the treated silages (Table 3).…”

“…Higher residual WSC in silage may be beneficial to ruminants, since it supplies energy to animals. However, residual WSC in silage may serve as substrate for aerobic microbes during the feeding-out phase (Weinberg et al, 1993).…”