nitrogen · Physiology: photosynthesis · Citrus

Results differ7 papers: 5 positive, 2 negative or no effect · 1 pair of papers confirmed to differ

14 claims from these papers; 2 citations between them.

Papers whose results differ, checked claim by claim 1

1 pair of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.

Net CO2 Assimilation and Foliar Injury of Citrus Leaves Sprayed with Saline Solutions and Urea Nitrogen (1995)
increaseUrea at 6% increased CO2 assimilation about 50%.
187 Foliar Application of Urea to Citrus: Effects of Non-ionic and Organosilicone Adjuvants (2000)
decreaseUrea alone reduced leaf net CO2 assimilation for 4 to 24 hours.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

How these papers cite each other

2 citations between these papers: 1 on the same side, 1 across the two sides.

Positive result
Negative result or no effect
Citation, pointing to the cited paper
Citation across the two sides
Larger circle: more citations overall

Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.

Papers reporting a positive result 5

Net CO2 Assimilation and Foliar Injury of Citrus Leaves Sprayed with Saline Solutions and Urea Nitrogen · 1995
- positive
  Urea at 6% increased CO2 assimilation about 50%.
- no effect
  Nitrogen content and CO2 assimilation were similar between urea and urea plus salt leaves.
  compared with ureaNo difference from an alternative treatment
Nitrate improves growth in salt-stressed citrus seedlings through effects on photosynthetic activity and chloride accumulation · 2004
- positive
  Nitrate supplementation increased nitrogen and chlorophyll contents and photosynthetic activity in leaves of salinized citrus.
cited by 1 paper here
Effects of supplementary potassium nitrate on growth and gas-exchange characteristics of salt-stressed citrus seedlings · 2014
- positive
  Nitrate increased chlorophyll content, Fv/Fm, and effective quantum yield.
- positive
  Nitrate stimulated photosynthetic activity.
cites 1 paper here
Effects of nitrogen supply on the photosynthetic capacity of the hybrid citrus cultivar 'Huangguogan' · 2019
- positive
  Photosynthetic capacity increased with nitrogen supply up to 120 g.
Growth, Mineral Nutrients, Photosynthesis and Related Physiological Parameters of Citrus in Response to Nitrogen Deficiency · 2021
- positive
  Nitrogen deficiency lowering CO2 assimilation.
  About lacking this nutrient, so it counts the other way round
- positive
  Nitrogen deficiency impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves.
  About lacking this nutrient, so it counts the other way round
- positive
  Nitrogen deficiency reducing photosynthetic pigment levels.
  About lacking this nutrient, so it counts the other way round
- negative
  Nitrogen deficiency improving photosynthetic N use efficiency (PNUE).
  About lacking this nutrient, so it counts the other way round
cited by 1 paper here

Papers reporting a negative result or no effect 2

A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.

nitrogen · Physiology: photosynthesis · Citrus

Papers whose results differ, checked claim by claim 1

How these papers cite each other

Papers reporting a positive result 5

Papers reporting a negative result or no effect 2

nitrogen on Citrus against other targets

nitrogen · physiology: photosynthesis on other organisms