DOI: 10.11118/978-80-7701-093-1-0164

CORRELATION BETWEEN CRUDE NUTRIENTS IN FRESH GRASS AND PROPYLENE GLYCOL CONCENTRATIONS IN GRASS SILAGE TREATED WITH A MIXTURE OF HOMO- AND HETEROFERMENTATIVE LACTIC ACID BACTERIA

Lau, N.¹, Kramer, E.¹, Hummel, J.², Hünerberg, M.²

¹ ISF GmbH Schaumann Forschung, Wiesenweg 32, 23812 Wahlstedt, Germany

² Department of Animal Sciences, niversity of Goettingen, Kellnerweg 6, 37077 Goettingen, Germany

Various strains of homo- and heterofermentative lactic acid bacteria (LAB) are used as silage inoculants. Homofermentative LAB convert water-soluble carbohydrates (WSC) into lactic acid, while heterofermentative LAB convert WSC into lactic and acetic acid. Some LAB strains (e.g. Lentilactobacillus buchneri) also produce alcohols such as propylene glycol (PG). In dairy cattle, PG is frequently used as glucogenic feed additive, to prevent ketosis at the onset of lactation. Even though high concentrations of PG in silages have been reported (up to 40 g/kg DM; Driehuis et al., 2001; Nishino et al., 2003), relatively little is known about compositional traits of grass, contributing to high PG yields. Therefore, this study was designed to identify compositional traits of grass that were associated with particularly high yields of PG in silages, inoculated with a mixture of homo- (Lactiplantibacillus plantarum, Lacticaseibacillus rhamnosus) and heterofermentative (Lentilactobacillus buchneri) LAB.

Klíčová slova: bacterial inoculant, grass silage, Lentilactobacillus buchneri, propylene glycol

stránky: 164-165, Publikováno: 2026, online: 2026