Abstract
Condensed tannins (CT) in legume forages vary not only in concentration and structure, but also in the portion of soluble and protein- and fibre-bound fractions. This study aimed to assess the changes in the total CT level as well as relative abundance of the three CT fractions from fresh to wilted, ensiled or pelleted legumes like in birds foot trefoil (two cultivars) and in sainfoin (one cultivar). Each legume underwent three consecutive harvests, of which the first two were wilted. Additionally, wilted legumes were either ensiled (first harvest) or transformed into dehydrated pellets (second harvest). For each harvest, total CT and the percentage of soluble, protein- and fibre-bound CT differed (P < 0.01) among plants. The total CT content was similar after wilting but was lower (P < 0.05) after ensiling. After wilting, ensiling and pelleting the portion of soluble CT was lower in favour of protein-bound CT portion. However, time of harvest affected (P < 0.05) total CT and the percentage of soluble and protein-bound CT. Thus, measuring the bound-fraction should not be ignored in the determination of CT content since this fraction, together with the soluble fraction, might protect protein from ruminal degradation.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Total condensed tannins and soluble, protein-bound, and fibre-bound fractions differed among plants.
- Taxon
- plantsViridiplantaee0
- Outcome
- total CT and the percentage of soluble, protein- and fibre-bound CTe0
- Value
- P < 0.01e0
Not reportedDirection
Verbatim
e0“For each harvest, total CT and the percentage of soluble, protein- and fibre-bound CT differed (P < 0.01) among plants.”
t0“birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viicifolia)”
Claim · model-written summary
Total condensed tannin content was similar after wilting.
Not reportedComparator
Verbatim
e0“The total CT content was similar after wilting but was lower (P < 0.05) after ensiling.”
t0“birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viicifolia)”
Claim · model-written summary
Ensiling lowered total condensed tannin content.
Not reportedComparator
Verbatim
e0“The total CT content was similar after wilting but was lower (P < 0.05) after ensiling.”
t0“birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viicifolia)”
Claim · model-written summary
Wilting, ensiling and pelleting lowered the soluble condensed tannin fraction.
- Taxon
- birdsfoot trefoilt0
- Treatment
- wilting, ensiling and pelletinge0
- Outcome
- portion of soluble CTe0
- Direction
- lowere0
Not reportedComparator
Verbatim
e0“After wilting, ensiling and pelleting the portion of soluble CT was lower in favour of protein-bound CT portion.”
t0“birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viicifolia)”
Claim · model-written summary
Wilting, ensiling and pelleting favoured the protein-bound condensed tannin fraction.
Not reportedComparatorDirection
Verbatim
e0“After wilting, ensiling and pelleting the portion of soluble CT was lower in favour of protein-bound CT portion.”
t0“birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viicifolia)”
Claim · model-written summary
Harvest time affected total condensed tannins and soluble and protein-bound fractions.
- Taxon
- birdsfoot trefoilt0
- Treatment
- time of harveste0
- Outcome
- total CT and the percentage of soluble and protein-bound CTe0
- Value
- P < 0.05e0
Not reportedDirection
Verbatim
e0“time of harvest affected (P < 0.05) total CT and the percentage of soluble and protein-bound CT.”
t0“birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viicifolia)”
Claim · model-written summary
The authors recommend measuring bound tannin fractions when determining condensed tannin content.
Not reportedDirection
Verbatim
e0“measuring the bound-fraction should not be ignored in the determination of CT content”
t0“birdsfoot trefoil (Lotus corniculatus) and sainfoin (Onobrychis viicifolia)”