Relationship between L-lactate and DL-lactate in different silage types

TY - GEN

T1 - Relationship between L-lactate and DL-lactate in different silage types

AU - Johansen, Marianne

AU - Weisbjerg, Martin Riis

AU - Novoa-Garrido, M.

AU - Kristensen, Niels Bastian

AU - Larsen, Mogens

PY - 2020

Y1 - 2020

N2 - The aim of this study was to examine the relationship between L-lactate and total lactate (DL-lactate) in a range of silage types. In total, 263 silage samples including pure grass silages, grass-clover silages, pure clover silages, whole crop maize silages, sugar beet silages, and seaweed silages were analysed. Across all silages, L:DL-lactate ratio was 0.495 indicating a racemic lactate production. However, in some types of seaweed samples, L:DL-lactate ratio was 0.09 and in silages with restricted fermentation the ratio was 0.94. In naturally fermented sugar beet silages, grass-clover silages and maize silages, the L:DL-lactate ratio was 0.448, 0.484 and 0.527, respectively. Inoculation with heterofermentative bacteria reduced L:DL-lactate ratio in both grass-clover and maize silages, whereas the L:DL-lactate ratio in silages fermented with a homofermentative inoculant did not differ from that in naturally fermented silages. The observed variation in L:DL-lactate ratios indicates that racemic lactate production is not valid for all types of silages.

AB - The aim of this study was to examine the relationship between L-lactate and total lactate (DL-lactate) in a range of silage types. In total, 263 silage samples including pure grass silages, grass-clover silages, pure clover silages, whole crop maize silages, sugar beet silages, and seaweed silages were analysed. Across all silages, L:DL-lactate ratio was 0.495 indicating a racemic lactate production. However, in some types of seaweed samples, L:DL-lactate ratio was 0.09 and in silages with restricted fermentation the ratio was 0.94. In naturally fermented sugar beet silages, grass-clover silages and maize silages, the L:DL-lactate ratio was 0.448, 0.484 and 0.527, respectively. Inoculation with heterofermentative bacteria reduced L:DL-lactate ratio in both grass-clover and maize silages, whereas the L:DL-lactate ratio in silages fermented with a homofermentative inoculant did not differ from that in naturally fermented silages. The observed variation in L:DL-lactate ratios indicates that racemic lactate production is not valid for all types of silages.

KW - preservation

KW - grass

KW - clover

KW - maize

KW - seaweed

KW - suger beet

M3 - Article in proceedings

SN - 978-952-326-944-6

SP - 282

EP - 284

BT - Meeting the future demands for grassland production

A2 - Virkajärvi, P.

A2 - Hakala, K.

A2 - Hakojärvi, M.

A2 - Helin, J.

A2 - Herzon, I.

A2 - Jokela, V.

A2 - Peltonen, S.

A2 - Rinne, M.

A2 - Seppänen, M.

A2 - Uusi-Kämppä, J.

PB - Wageningen Academic Publishers

T2 - 28th General Meeting of European Grassland Federation (EGF)

Y2 - 19 October 2020 through 21 October 2020

ER -