Abstract
SUMMARY Three experiments examined the response of potato cultivars from different maturity groups to fertiliser phosphorus application under conditions of relatively low residual soil P. Initial expansion of the leaf canopy was much more rapid following P application and maximum cover was attained sooner. In the absence of applied P, maximum ground cover was reduced substantially in early‐maturing cultivars but not in maincrop cultivars. At early harvests, all cultivars showed very large growth responses to P application, but cv. Rocket grown from well‐sprouted seed showed a significantly larger response than cv. Desiree. In the absence of applied P, ground cover was in some cases higher at later growth stages allowing a substantial degree of growth compensation so that final harvests showed only small effects of P application on dry matter yields. At final harvests, no significant interactions between cultivar and phosphorus fertiliser level were found for either dry matter production or P uptake despite some apparent effects. Phosphorus application increased dry matter production through increased interception of solar radiation with no effect on efficiency of utilisation.
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Claims 11
Claim · model-written summary
Phosphorus application accelerated initial leaf canopy expansion and attainment of maximum cover.
- Taxon
- potato cultivars
Solanum tuberosumt0 - Treatment
- P applicatione0
- Outcome
- expansion of the leaf canopye0
- Direction
- much more rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Initial expansion of the leaf canopy was much more rapid following P application and maximum cover was attained sooner”
t0“potato cultivars”
Claim · model-written summary
Without applied phosphorus, maximum ground cover was substantially lower in early-maturing cultivars.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Material
- early‐maturing cultivarse0
- Treatment
- absence of applied Pe0
- Outcome
- maximum ground covere0
- Direction
- reduced substantiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of applied P, maximum ground cover was reduced substantially in early‐maturing cultivars but not in maincrop cultivars”
t0“potato cultivars”
Claim · model-written summary
Maincrop cultivars did not show reduced maximum ground cover without applied phosphorus.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Material
- maincrop cultivarse0
- Treatment
- absence of applied Pe0
- Outcome
- maximum ground covere0
- Direction
- not in maincrop cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of applied P, maximum ground cover was reduced substantially in early‐maturing cultivars but not in maincrop cultivars”
t0“potato cultivars”
Claim · model-written summary
At early harvests all cultivars had very large growth responses to phosphorus application.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Treatment
- P applicatione0
- Outcome
- growth responsese0
- Direction
- very largee0
- Qualifier
- At early harvestse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At early harvests, all cultivars showed very large growth responses to P application”
t0“potato cultivars”
Claim · model-written summary
Well-sprouted Rocket responded more strongly to phosphorus than Desiree at early harvest.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Material
- cv. Rockete0
- Treatment
- P applicatione1
- Outcome
- responsee0
- Direction
- largere0
- Qualifier
- well‐sprouted seede0
- Comparator
- cv. Desireee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cv. Rocket grown from well‐sprouted seed showed a significantly larger response than cv. Desiree”
t0“potato cultivars”
e1“Initial expansion of the leaf canopy was much more rapid following P application and maximum cover was attained sooner”
Claim · model-written summary
Without applied phosphorus, ground cover was sometimes higher at later stages.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Treatment
- absence of applied Pe0
- Outcome
- ground covere0
- Direction
- highere0
- Qualifier
- at later growth stagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of applied P, ground cover was in some cases higher at later growth stages”
t0“potato cultivars”
Claim · model-written summary
Final dry matter yields showed only small effects of phosphorus application after growth compensation.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Treatment
- P applicatione0
- Outcome
- dry matter yieldse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“final harvests showed only small effects of P application on dry matter yields”
t0“potato cultivars”
Claim · model-written summary
Cultivar and phosphorus level did not interact significantly for final dry matter production.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Treatment
- phosphorus fertiliser levele0
- Outcome
- dry matter productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant interactions between cultivar and phosphorus fertiliser level were found for either dry matter production or P uptake”
t0“potato cultivars”
Claim · model-written summary
Cultivar and phosphorus level did not interact significantly for final phosphorus uptake.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Treatment
- phosphorus fertiliser levele0
- Outcome
- P uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant interactions between cultivar and phosphorus fertiliser level were found for either dry matter production or P uptake”
t0“potato cultivars”
Claim · model-written summary
Phosphorus application increased dry matter production through greater solar radiation interception.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Treatment
- Phosphorus applicatione0
- Outcome
- dry matter productione0
- Direction
- increasede0
- Qualifier
- increased interception of solar radiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus application increased dry matter production through increased interception of solar radiation”
t0“potato cultivars”
Claim · model-written summary
Phosphorus application did not affect radiation utilization efficiency.
- Taxon
- potato cultivarsSolanum tuberosumt0
- Treatment
- Phosphorus applicatione1
- Outcome
- efficiency of utilisatione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with no effect on efficiency of utilisation”
t0“potato cultivars”
e1“Phosphorus application increased dry matter production through increased interception of solar radiation”
The same questions in other papers
phosphorus · growth · Solanum tuberosum (potato)Positive and negative results
14 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
- negative
- positive
- negative
18 papers more in this group
See all 22 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.