Intervention effectmodel-written summary

Nitrogen supply above 10 g m-2 reduced Fv/Fm in potato.

A claim from Chlorophyll fluorescence and chlorophyll content in field-grown potato as affected by nitrogen supply, genotype, and plant age · 2006

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrogen supply above 10 g m-2 reduced Fv/Fm in potato.

Treatment
Nitrogen supplye2
Outcome
Fv/Fme2
Direction
reducede2
Qualifier
above this ratee2

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum tuberosum
Solanum tuberosum · TaxonScott Bauer, USDA ARS · Public domain · Wikimedia Commons ↗

Verbatim

t0

“field-grown potato as affected by nitrogen supply, genotype, and plant age”

✓ located verbatim in the source · title, characters 52–126
e2

“Nitrogen supply up to 10 g m-2 also had a positive effect on Fm and Fv, but above this rate it reduced Fv/Fm”

✓ located verbatim in the source · abstract, characters 806–914

Title

Chlorophyll fluorescence and chlorophyll content in field-grown potato as affected by nitrogen supply, genotype, and plant age

G. Mauromicale; A. Ierna; M. Marchese Photosynthetica 2006. doi:10.1007/s11099-005-0161-4

Other claims from this paper (13)

Record rev-e0d91b0f95afc84f79365c519a55399de8384749d71455d218cb72fad1d76d27 · schema claims-v0.9 · position 3 in the model’s answer

nitrogen · physiology: photosynthesis · Solanum tuberosum (potato)Positive and negative results

6 papers: 2 positive, 4 negative or no effect

3 papers in the same direction as this claim · 2 in the opposite direction

  1. positive
    Compared with fenoxaprop alone, 4 g L-1 urea with 1.33 ml L-1 fenoxaprop significantly increased Pn of potato plants by 36.12.

    Fenoxaprop combined with urea improves photosynthesis, weed control, and yield of potato · 2020 · compared with fenoxaprop treatment alone

    Opposite directionCites this paper

  2. positive
    At the same water level, 1.68 g N L-1 gave significantly higher net photosynthetic rate, stomatal conductance and transpiration rate than other nitrogen levels.

    Influence of early nitrogen application on physiological properties and ultrastructures of functional leaves of potatoes under drought stress · 2018 · compared with other nitrogen treatment levels

    Opposite direction

  3. no effect
    Leaves without applied nitrogen reached photosynthetic rates as high as nitrogen-treated leaves.

    Field measurements of the photosynthetic rate of potatoes grown with different amounts of nitrogen fertilizer · 1988 · compared with those receiving N

    Same directionAbout lacking this nutrient, so it counts the other way round

  4. no effect
    Nitrogen application did not raise photosynthetic rate during tuber swelling.

    Production efficiency of nitrogen absorbed by-potato plant at various growth stages · 1993

    Same direction

  5. negative
    Nitrogen-phosphorus and nitrogen-potassium fertilizer combinations did not provide high photosynthetic potential rates in potato plantings under increased soil nitrogen.

    The effectiveness of the use of mineral fertilizers in the technology of potato seed production in the conditions of the mountainous zone of Kabardino-Balkaria · 2022 · compared with against the background of increased nitrogen content in the soil

    Same direction

See all 6 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.