Abstract
Abstract White clover ( Trifolium repens L.) and ryegrass ( Lolium perenne L.) were grown separately and together, at five soil P levels, and with or without vesicular‐arbuscular mycorrhizas (VAM). At 0 kg P/ha VAM produced a 5‐fold increase in total clover dry weight when grown alone and a 40‐fold increase when grown with ryegrass. In the absence of tyegrasss total clover dry weights were increased by VAM at 0 and 4 kg P/ha while in the presence of ryegrass, clover P concentrations were depressed and VAM stimulated clover growth at 12 kg P/ha. By the third harvest VAM stimulated clover grown alone at 12 kg P/ha although it did not significantly stimulate total yield. The results show that VAM clover is better equipped than non‐mycorrhizal clover to compete with ryegrass for soil P and that inter‐ and intra‐specific competition for soil P resulted in VAM stimulating clover more and at higher soil P levels. Ryegrass displayed a poor response to both P and VAM, which was attributed to N deficiency.
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Claims 8
Claim · model-written summary
At zero phosphorus, mycorrhizae increased clover dry weight fivefold when grown alone.
TrifoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 0 kg P/ha VAM produced a 5‐fold increase in total clover dry weight when grown alone”
Claim · model-written summary
At zero phosphorus, mycorrhizae increased clover dry weight fortyfold with ryegrass.
LoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 0 kg P/ha VAM produced a 5‐fold increase in total clover dry weight when grown alone and a 40‐fold increase when grown with ryegrass.”
Claim · model-written summary
Without ryegrass, mycorrhizae increased clover dry weight at zero and four kilograms phosphorus per hectare.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of tyegrasss total clover dry weights were increased by VAM at 0 and 4 kg P/ha”
Claim · model-written summary
With ryegrass, clover phosphorus concentrations were depressed.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the presence of ryegrass, clover P concentrations were depressed”
Claim · model-written summary
With ryegrass, mycorrhizae stimulated clover growth at twelve kilograms phosphorus per hectare.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“VAM stimulated clover growth at 12 kg P/ha”
Claim · model-written summary
By the third harvest, mycorrhizae stimulated clover grown alone at twelve kilograms phosphorus per hectare.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By the third harvest VAM stimulated clover grown alone at 12 kg P/ha”
Claim · model-written summary
At the third harvest, mycorrhizae did not significantly stimulate total yield.
Not reportedTaxonTreatmentComparator
Verbatim
e0“although it did not significantly stimulate total yield.”
Claim · model-written summary
Ryegrass responded poorly to phosphorus and mycorrhizae.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ryegrass displayed a poor response to both P and VAM”
The same questions in other papers
mycorrhiza · Lolium · TrifoliumPositive and negative results
1 in the opposite direction
- no effect
mycorrhiza · growth · TrifoliumPositive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
5 papers more in this group
See all 9 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.