Claim · model-written summary
Higher phosphorus lowered acidity and potassium content relative to lower phosphorus.
- Taxon
- tomato
Solanum lycopersicume2 - Treatment
- higher level (31ppm)e0
- Outcome
- acidities and the potassium contente0
- Direction
- lowere0
- Qualifier
- phosphorus levelse1
- Comparator
- lower level (5ppm)e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the acidities and the potassium content at the higher level (31ppm) were lower than those at the lower level (5ppm)”
e1“For the effects of phosphorus levels”
e2“acidity of tomato fruits”
Title
Effects of nitrogen, phosphorus and potassium on the acidity of tomato fruits
R. SAKIYAMA Journal of the Japanese Society for Horticultural Science 1967. doi:10.2503/jjshs.36.399
Other claims from this paper (18)
- Intervention effect Higher potassium increased titratable, total, and combined acidity of fruit extracts.
- Intervention effect Higher potassium raised fruit potassium and inorganic phosphate contents.
- Intervention effect Higher phosphorus increased inorganic phosphate content.
- Association Titratable acidity was significantly correlated with potassium content, r=0.96.
- Association Titratable acidity was not correlated with inorganic phosphate content, r=-0.03.
- Association Total acidity showed the same correlation pattern as titratable acidity.
- Mechanism The phosphorus effect on acidity was interpreted as indirect.
- Intervention effect Higher nitrogen lowered combined acidity and potassium content.
- Intervention effect At low potassium, higher nitrogen decreased titratable and total acidity.
- Intervention effect Higher nitrogen significantly decreased gelatinous pulp weight as a percentage of fruit.
- Intervention effect Higher phosphorus significantly decreased gelatinous pulp weight as a percentage of fruit.
- Intervention effect Potassium levels did not affect gelatinous pulp weight percentage.
- Observation Nitrogen and phosphorus effects on fruit acidity and potassium content did not differ by tissue type.
- Association Potassium effects on titratable and total acidity and potassium content were greater in gelatinous pulp than wall tissue.
- Intervention effect Ammonium nitrogen supply lowered titratable and total acidity versus nitrate-only supply.
- Intervention effect The 5:5 nitrogen solution decreased combined acidity and potassium content.
- Intervention effect Ammonium nitrogen lowered titratable acidity as a percentage of total acidity versus nitrate only.
- Intervention effect In volcanic ash soil pots, phosphorus had no significant effect on fruit acidity.