Abstract
Neutral detergent fibre (NDF), acid detergent fibre (ADF) and water soluble carbohydrate (WSC) levels were determined on 80 samples of known apparent dry matter digestibility (DMD) and voluntary intake of dry matter (DMI). The pastures consisted of regrowths of six species: Trifolium repens (white clover cv. Grasslands Huia), Lolium perenne x L. multiflorum (short rotation ryegrass c.v Grasslands Manawa), Lolium perenne (long rotation ryegrass cv. Grasslands Ariki), Lolium perenne (perennial ryegrass cv. Tasmania No. I), Dactylis glomerata (cocksfoot cv. Currie) and Dactylis glomerata (cocksfoot cv. Grasslands Apanui), cut eight times between May 1969 and August 1970. Overall, white clover had a lower NDF and a lower WSC content than the ryegrasses but both groups had similar ADF contents. Cocksfoots had higher NDF and ADF, and lower WSC contents than the ryegrasses. NDF and ADF could be used to predict the DMD of all species in all seasons with residual standard deviations (RSD) of 3.0 and 3.2 DMD units (per cent) respectively. No significant relations (P < 0.05) were present between DMD and WSC content. Seasonal differences were present in the relations between DMI and chemical composition. The RSD of the overall regressions of intake with NDF, ADF, and WSC contents were 9.3, 9.4, and 8.9 DMI units (g/day/kg0.75) respectively. Within seasons, DMI was best predicted by regressions with detergent fibre content and here the RSD had a range of 3.4 to 5.2 DMI units. Within species over all seasons, DMI was predicted best by regressions with WSC content and the RSD had a range of 5.7 to 7.9 DMI units. The usefulness of the chemical composition measurements in explaining the reason for the low intakes, previously found with winter pasture, is discussed.
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Claims 13
Claim · model-written summary
White clover had lower NDF and WSC than ryegrasses.
- Taxon
- white clover
Trifolium repense0 - Outcome
- lower NDF and a lower WSC contente0
- Comparator
- ryegrassese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“white clover had a lower NDF and a lower WSC content than the ryegrasses”
Claim · model-written summary
White clover and ryegrasses had similar ADF.
- Taxon
- white cloverTrifolium repense1
- Outcome
- similar ADF contentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both groups had similar ADF contents”
e1“Overall, white clover had a lower NDF”
Claim · model-written summary
Cocksfoots had higher NDF and ADF than ryegrasses.
- Taxon
- Cocksfoots
.jpg?width=60)
Dactylis glomeratae0 - Outcome
- higher NDF and ADFe0
- Comparator
- ryegrassese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Cocksfoots had higher NDF and ADF, and lower WSC contents than the ryegrasses”
Claim · model-written summary
Cocksfoots had lower WSC than ryegrasses.
- Taxon
- CocksfootsDactylis glomeratae0
- Outcome
- lower WSC contentse0
- Comparator
- ryegrassese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cocksfoots had higher NDF and ADF, and lower WSC contents than the ryegrasses”
Claim · model-written summary
NDF predicted DMD with residual standard deviation of 3.0 DMD units.
Verbatim
e0“NDF and ADF could be used to predict the DMD of all species in all seasons with residual standard deviations (RSD) of 3.0 and 3.2 DMD units (per cent) respectively”
t0“pasture species”
Claim · model-written summary
ADF predicted DMD with residual standard deviation of 3.2 DMD units.
Verbatim
e0“NDF and ADF could be used to predict the DMD of all species in all seasons with residual standard deviations (RSD) of 3.0 and 3.2 DMD units (per cent) respectively”
t0“pasture species”
Claim · model-written summary
DMD and WSC had no significant relation.
Not reportedMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSettingDirection
Verbatim
e0“No significant relations (P < 0.05) were present between DMD and WSC content”
t0“pasture species”
Claim · model-written summary
DMI composition relations differed by season.
- Taxon
- pasture speciest0
- Outcome
- relations between DMI and chemical compositione0
- Qualifier
- Seasonal differencese0
Not reportedSettingDirection
Verbatim
e0“Seasonal differences were present in the relations between DMI and chemical composition”
t0“pasture species”
Claim · model-written summary
Overall NDF regression for intake had RSD 9.3 DMI units.
Verbatim
e0“The RSD of the overall regressions of intake with NDF, ADF, and WSC contents were 9.3, 9.4, and 8.9 DMI units (g/day/kg0.75) respectively”
t0“pasture species”
Claim · model-written summary
Overall ADF regression for intake had RSD 9.4 DMI units.
Verbatim
e0“The RSD of the overall regressions of intake with NDF, ADF, and WSC contents were 9.3, 9.4, and 8.9 DMI units (g/day/kg0.75) respectively”
t0“pasture species”
Claim · model-written summary
Overall WSC regression for intake had RSD 8.9 DMI units.
Verbatim
e0“The RSD of the overall regressions of intake with NDF, ADF, and WSC contents were 9.3, 9.4, and 8.9 DMI units (g/day/kg0.75) respectively”
t0“pasture species”
Claim · model-written summary
Within seasons, detergent fibre best predicted DMI with RSD 3.4 to 5.2.
Verbatim
e0“Within seasons, DMI was best predicted by regressions with detergent fibre content and here the RSD had a range of 3.4 to 5.2 DMI units”
t0“pasture species”
Claim · model-written summary
Within species, WSC best predicted DMI with RSD 5.7 to 7.9.
Verbatim
e0“Within species over all seasons, DMI was predicted best by regressions with WSC content and the RSD had a range of 5.7 to 7.9 DMI units”
t0“pasture species”