Abstract
Pre-ensiling treatments can significantly influence the composition of lucerne (Medicago sativa L.) silages (LS). Besides dry matter (DM) content and availability of water-soluble carbohydrates (WSC), wilting intensity may exert a strong impact on the crude protein (CP; nitrogen [N] × 6.25) fractions. The present study aimed to evaluate the effects of DM level, wilting intensity, and sucrose addition on N compounds and fermentation products in LS. Pure lucerne stand (cultivar Plato) was wilted with either high or low intensity to DM contents of 250 and 350 g kg−1, respectively, and ensiled with or without the addition of sucrose. Non-protein-N (NPN) concentration in LS was affected by all pre-ensiling treatments and with 699 g kg−1 CP, NPN was lowest in high-intensity wilted high-DM LS with sucrose addition. No effects were observed on in vitro-estimated concentrations of utilizable CP at the duodenum, a precursor to metabolizable protein. Sucrose addition and higher DM level decreased acetic acid and ammonia-N concentration in the silages. Therefore, the present study demonstrated the beneficial manipulation of CP fractions in LS by high-intensity wilting to higher DM contents and that the provision of WSC may be necessary for sufficient silage fermentation and protein preservation.
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Claims 7
Claim · model-written summary
Non-protein nitrogen concentration was affected by all pre-ensiling treatments.
- Taxon
- Lucerne
Medicago sativat0 - Treatment
- all pre-ensiling treatmentse0
- Outcome
- Non-protein-N (NPN) concentratione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Non-protein-N (NPN) concentration in LS was affected by all pre-ensiling treatments”
t0“Lucerne”
Claim · model-written summary
High intensity wilting, high dry matter and sucrose produced the lowest silage non-protein nitrogen concentration, 699 g kg−1 CP.
- Taxon
- LucerneMedicago sativat0
- Treatment
- high-intensity wilted high-DM LS with sucrose additione0
- Outcome
- NPNe0
- Direction
- loweste0
- Value
- 699 g kg−1 CPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with 699 g kg−1 CP, NPN was lowest in high-intensity wilted high-DM LS with sucrose addition”
t0“Lucerne”
Claim · model-written summary
Pre-ensiling treatments showed no observed effect on estimated utilizable crude protein at the duodenum.
- Taxon
- LucerneMedicago sativat0
- Outcome
- in vitro-estimated concentrations of utilizable CP at the duodenume0
- Direction
- No effectse0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No effects were observed on in vitro-estimated concentrations of utilizable CP at the duodenum”
t0“Lucerne”
Claim · model-written summary
Sucrose addition decreased silage acetic acid and ammonia nitrogen concentrations.
- Taxon
- LucerneMedicago sativat0
- Treatment
- Sucrose additione0
- Outcome
- acetic acid and ammonia-N concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose addition and higher DM level decreased acetic acid and ammonia-N concentration in the silages.”
t0“Lucerne”
Claim · model-written summary
Higher dry matter decreased silage acetic acid and ammonia nitrogen concentrations.
- Taxon
- LucerneMedicago sativat0
- Treatment
- higher DM levele0
- Outcome
- acetic acid and ammonia-N concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose addition and higher DM level decreased acetic acid and ammonia-N concentration in the silages.”
t0“Lucerne”
Claim · model-written summary
The authors conclude that high intensity wilting to higher dry matter benefits silage protein fractions.
- Taxon
- LucerneMedicago sativat0
- Treatment
- high-intensity wilting to higher DM contentse0
- Outcome
- beneficial manipulation of CP fractionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“beneficial manipulation of CP fractions in LS by high-intensity wilting to higher DM contents”
t0“Lucerne”
Claim · model-written summary
The authors suggest water soluble carbohydrates may be necessary for sufficient silage fermentation and protein preservation.
- Taxon
- LucerneMedicago sativat0
- Treatment
- provision of WSCe0
- Outcome
- sufficient silage fermentation and protein preservatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the provision of WSC may be necessary for sufficient silage fermentation and protein preservation”
t0“Lucerne”
The same questions in other papers
sucrose · molecular: metabolites · Medicago sativa (alfalfa)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.