Abstract
Abstract The concentration of mineral elements in herbage from permanent swards of mixed species composition (predominantly Agrostis spp., Holcus lanatus, Festuca rubra, Lolium perenne, Poa spp., etc.) was compared with that from sown perennial ryegrass ( Lolium perenne ) at two fertilizer rates (0 and 300kg N ha −1 year −1 , both with P and K) and with L. perennel Trifolium repens (at 0 N with P and K). The investigation was conducted over four years at sixteen contrasting sites in England and Wales. Herbage samples for mineral analysis were taken at first and fourth harvests (May and August) each year from plots under 4‐weekly cutting. There was a wide degree of variation between sites, particularly for concentrations of Ca, Mg, Na and all trace elements analysed. Herbage from L. perenne reseeds had significantly higher concentrations of Ca, Mg, Na, Co and S, but K, Mo, Zn, Cu and P were generally lower than in the permanent swards. L. perennel T. repens swards had the highest concentration of major cations, but trace element levels were generally intermediate between those for 0 N permanent and L. perenne swards. Fertilizer N reduced concentrations of Ca, Mn, Mo and S, and increased Mg, Na and Zn, with no consistent effects on K, Co and Cu. Herbage at harvest 4, compared with harvest 1, had higher Ca, Mg, Na, Mn, Zn and S. Permanent and L. perenne swards responded similarly to fertilizer N and between harvest dates. Results are discussed in relation to previous reports of botanical and fertilizer effects on mineral concentrations, and the mineral requirements of livestock. Changes in mineral concentration resulting from reseeding permanent swards are considered unlikely to increase mineral‐related livestock disorders, and in many cases could be beneficial, though problems might arise on sites where some elements, e.g. Cu and Mg, are low.
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Claims 15
Claim · model-written summary
Herbage mineral concentrations varied widely among sites, particularly Ca, Mg, Na and trace elements.
- Taxon
- Lolium perenne
Lolium perennee1 - Outcome
- concentrations of Ca, Mg, Na and all trace elementse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a wide degree of variation between sites, particularly for concentrations of Ca, Mg, Na and all trace elements analysed.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
L. perenne reseeds had higher Ca, Mg and Na than permanent swards.
- Taxon
- L. perenneLolium perennee0
- Organ / stage
- Herbagee0
- Outcome
- concentrations of Ca, Mg, Nae0
- Direction
- highere0
- Comparator
- permanent swardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbage from L. perenne reseeds had significantly higher concentrations of Ca, Mg, Na, Co and S, but K, Mo, Zn, Cu and P were generally lower than in the permanent swards.”
Claim · model-written summary
L. perenne reseeds had higher Co and S than permanent swards.
- Taxon
- L. perenneLolium perennee0
- Outcome
- Co and Se0
- Direction
- highere0
- Comparator
- permanent swardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbage from L. perenne reseeds had significantly higher concentrations of Ca, Mg, Na, Co and S, but K, Mo, Zn, Cu and P were generally lower than in the permanent swards.”
Claim · model-written summary
L. perenne reseeds generally had lower K, Mo and Zn than permanent swards.
- Taxon
- Lolium perenneLolium perennee1
- Outcome
- K, Mo, Zne0
- Direction
- lowere0
- Comparator
- permanent swardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but K, Mo, Zn, Cu and P were generally lower than in the permanent swards.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
L. perenne reseeds generally had lower Cu and P than permanent swards.
- Taxon
- Lolium perenneLolium perennee1
- Outcome
- Cu and Pe0
- Direction
- lowere0
- Comparator
- permanent swardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but K, Mo, Zn, Cu and P were generally lower than in the permanent swards.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
L. perenne and T. repens swards had the highest major cation concentrations.
Verbatim
e0“L. perennel T. repens swards had the highest concentration of major cations, but trace element levels were generally intermediate between those for 0 N permanent and L. perenne swards.”
Claim · model-written summary
L. perenne and T. repens sward trace elements were intermediate between permanent and ryegrass swards.
Verbatim
e0“L. perennel T. repens swards had the highest concentration of major cations, but trace element levels were generally intermediate between those for 0 N permanent and L. perenne swards.”
Claim · model-written summary
Fertilizer nitrogen reduced Ca, Mn and Mo in herbage.
- Taxon
- Lolium perenneLolium perennee1
- Treatment
- Fertilizer Ne0
- Outcome
- concentrations of Ca, Mn, Moe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N reduced concentrations of Ca, Mn, Mo and S, and increased Mg, Na and Zn, with no consistent effects on K, Co and Cu.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
Fertilizer nitrogen reduced S in herbage.
- Taxon
- Lolium perenneLolium perennee1
- Treatment
- Fertilizer Ne0
- Outcome
- Se0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N reduced concentrations of Ca, Mn, Mo and S, and increased Mg, Na and Zn, with no consistent effects on K, Co and Cu.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
Fertilizer nitrogen increased Mg, Na and Zn in herbage.
- Taxon
- Lolium perenneLolium perennee1
- Treatment
- Fertilizer Ne0
- Outcome
- Mg, Na and Zne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N reduced concentrations of Ca, Mn, Mo and S, and increased Mg, Na and Zn, with no consistent effects on K, Co and Cu.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
Fertilizer nitrogen showed no consistent effects on K, Co and Cu.
- Taxon
- Lolium perenneLolium perennee1
- Treatment
- Fertilizer Ne0
- Outcome
- K, Co and Cue0
- Direction
- no consistent effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N reduced concentrations of Ca, Mn, Mo and S, and increased Mg, Na and Zn, with no consistent effects on K, Co and Cu.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
Harvest four herbage had higher Ca, Mg and Na than harvest one.
- Taxon
- Lolium perenneLolium perennee1
- Organ / stage
- Herbagee0
- Outcome
- Ca, Mg, Nae0
- Direction
- highere0
- Comparator
- harvest 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbage at harvest 4, compared with harvest 1, had higher Ca, Mg, Na, Mn, Zn and S.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
Harvest four herbage had higher Mn, Zn and S than harvest one.
- Taxon
- Lolium perenneLolium perennee1
- Organ / stage
- Herbagee0
- Outcome
- Mn, Zn and Se0
- Direction
- highere0
- Comparator
- harvest 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbage at harvest 4, compared with harvest 1, had higher Ca, Mg, Na, Mn, Zn and S.”
e1“sown perennial ryegrass ( Lolium perenne )”
Claim · model-written summary
Permanent and ryegrass swards responded similarly to fertilizer nitrogen and harvest date.
- Taxon
- L. perenneLolium perennee0
- Treatment
- fertilizer Ne0
- Outcome
- responded similarlye0
- Comparator
- Permanente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Permanent and L. perenne swards responded similarly to fertilizer N and between harvest dates.”
Claim · model-written summary
Reseeding is considered unlikely to increase mineral related livestock disorders.
- Taxon
- Lolium perenneLolium perennee1
- Outcome
- unlikely to increase mineral‐related livestock disorderse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in mineral concentration resulting from reseeding permanent swards are considered unlikely to increase mineral‐related livestock disorders”
e1“sown perennial ryegrass ( Lolium perenne )”
The same questions in other papers
fertilization · nutrient: content · Lolium perenne (perennial ryegrass)Positive and negative results
4 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 papers →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.