Abstract
Summary Three experiments examined effects on growth, dry matter partitioning and nutrient uptake in potato plants grown in large pots under different combinations of adequate and deficient levels of nitrogen, phosphorus and potassium. N supply affected the growth of all leaves, with low N reducing both the size of individual leaves and the extent of branch growth. P and K availability affected the growth of later formed leaves and only when both were deficient was branch growth substantially reduced. At later stages of growth, total green leaf area was significantly reduced by deficiency of each of the nutrients. Partitioning of dry matter to tubers was markedly reduced by K deficiency and increased in one experiment by P deficiency. When both P and K were deficient, partitioning approximated that under non‐limiting conditions. Leaf weight ratio (LWR) was higher under K deficiency, but not when P was also deficient, and was consistently higher when the ratio of K : P in dry matter was less than approximately five. In these experiments, LWR was not consistently related to shoot N% and N supply had relatively little effect on partitioning. There were large treatment effects on tuber dry matter percentage, characterised by significant interactions especially between N and K. Deficiency of one nutrient increased the concentration of others but uptake was highly regulated as crop content of all three nutrients was reduced when the supply of any one was deficient. The results show that the response of potatoes to single deficiencies may be influenced greatly by the levels of other nutrients.
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Claims 16
Claim · model-written summary
Low N reduced individual leaf size.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- low Ne0
- Outcome
- size of individual leavese0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low N reducing both the size of individual leaves and the extent of branch growth”
t0“potato plants”
Claim · model-written summary
Low N reduced branch growth.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- low Ne0
- Outcome
- extent of branch growthe0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low N reducing both the size of individual leaves and the extent of branch growth”
t0“potato plants”
Claim · model-written summary
P and K availability affected growth of later formed leaves.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- P and K availabilitye0
- Outcome
- growth of later formed leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P and K availability affected the growth of later formed leaves”
t0“potato plants”
Claim · model-written summary
Combined P and K deficiency substantially reduced branch growth.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- both were deficiente0
- Outcome
- branch growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only when both were deficient was branch growth substantially reduced”
t0“potato plants”
Claim · model-written summary
Deficiency of each nutrient significantly reduced green leaf area at later stages.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- later stages of growthe0
- Treatment
- deficiency of each of the nutrientse0
- Outcome
- total green leaf areae0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At later stages of growth, total green leaf area was significantly reduced by deficiency of each of the nutrients”
t0“potato plants”
Claim · model-written summary
K deficiency reduced dry matter partitioning to tubers.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- K deficiencye0
- Outcome
- Partitioning of dry matter to tuberse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Partitioning of dry matter to tubers was markedly reduced by K deficiency”
t0“potato plants”
Claim · model-written summary
P deficiency increased tuber partitioning in one experiment.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- P deficiencye0
- Outcome
- Partitioning of dry matter to tuberse1
- Direction
- increasede0
- Qualifier
- one experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased in one experiment by P deficiency”
t0“Dry matter production and partitioning in potato plants subjected to combined deficiencies of nitrogen, phosphorus and potassium”
e1“Partitioning of dry matter to tubers was markedly reduced by K deficiency”
Claim · model-written summary
Combined P and K deficiency gave partitioning approximating nonlimiting conditions.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- both P and K were deficiente0
- Outcome
- partitioninge0
- Comparator
- non‐limiting conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When both P and K were deficient, partitioning approximated that under non‐limiting conditions”
t0“potato plants”
Claim · model-written summary
K deficiency increased leaf weight ratio.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- K deficiencye0
- Outcome
- Leaf weight ratioe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf weight ratio (LWR) was higher under K deficiency”
t0“potato plants”
Claim · model-written summary
Added P deficiency removed the higher LWR under K deficiency.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- P was also deficiente0
- Outcome
- Leaf weight ratioe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not when P was also deficient”
t0“potato plants”
e1“Leaf weight ratio (LWR) was higher under K deficiency”
Claim · model-written summary
LWR was higher when dry matter K:P ratio was below about five.
- Taxon
- potatoSolanum tuberosumt0
- Compound
- K : Pe0
- Outcome
- LWRe1
- Direction
- highere0
- Qualifier
- less than approximately fivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was consistently higher when the ratio of K : P in dry matter was less than approximately five”
t0“potato plants”
e1“Leaf weight ratio (LWR) was higher under K deficiency”
Claim · model-written summary
LWR was not consistently related to shoot N percentage.
- Taxon
- potatoSolanum tuberosumt0
- Compound
- shoot N%e0
- Outcome
- LWRe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LWR was not consistently related to shoot N%”
t0“potato plants”
Claim · model-written summary
N supply had little effect on dry matter partitioning.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- N supplye0
- Outcome
- partitioninge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N supply had relatively little effect on partitioning”
t0“potato plants”
Claim · model-written summary
Treatments strongly affected tuber dry matter percentage with N × K interaction.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- N and Ke0
- Outcome
- tuber dry matter percentagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were large treatment effects on tuber dry matter percentage, characterised by significant interactions especially between N and K”
t0“potato plants”
Claim · model-written summary
Deficiency of one nutrient increased concentrations of others.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Deficiency of one nutriente0
- Outcome
- concentration of otherse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficiency of one nutrient increased the concentration of others”
t0“potato plants”
Claim · model-written summary
Deficiency of any one nutrient reduced crop content of all three nutrients.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- supply of any one was deficiente0
- Outcome
- crop content of all three nutrientse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop content of all three nutrients was reduced when the supply of any one was deficient”
t0“potato plants”
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See all 51 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.