Claim · model-written summary
The 5:5 nitrogen solution decreased combined acidity and potassium content.
- Taxon
- tomato
Solanum lycopersicume2 - Treatment
- 5:5 solutione0
- Outcome
- Combined acidity and the potassium contente0
- Direction
- decreasede0
- Comparator
- nitrate nitrogen only (10: 0)e1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined acidity and the potassium content were, however, decreased at the 5:5 solution only”
e1“nitrate nitrogen only (10: 0)”
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 lowered acidity and potassium content relative to lower phosphorus.
- 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 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.