Intervention effectmodel-written summary

Increasing nitrogen fertilizer decreased photosynthetic rates of both top leaves during grain filling.

A claim from Effect of Nitrogen Fertilizer on Photosynthesis of Several Varieties of Winter Wheat · 1979

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing nitrogen fertilizer decreased photosynthetic rates of both top leaves during grain filling.

Taxon
winter wheatTriticum aestivumt0
Organ / stage
grain-filling periode0
Treatment
nitrogen fertilizere0
Outcome
photosynthetic rates of both leavese0
Direction
decreasede0

Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The photosynthetic rates of both leaves during the grain-filling period decreased with increase in nitrogen fertilizer”

✓ located verbatim in the source · abstract, characters 204–322
t0

“winter wheat”

✓ located after whitespace/quote normalisation · title, characters 72–84

Title

Effect of Nitrogen Fertilizer on Photosynthesis of Several Varieties of Winter Wheat

I. PEARMAN; S. M. THOMAS; G. N. THORNE Annals of Botany 1979. doi:10.1093/oxfordjournals.aob.a085672

Record rev-bbc7d39b14d667f17da3ced4513d11c42eb2a87979764376f09df3c269597967 · schema claims-v0.9 · position 1 in the model’s answer

fertilization · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results

133 papers: 126 positive, 7 negative or no effect

6 papers in the same direction as this claim · 126 in the opposite direction

  1. no effect
    Maximum flag-leaf photosynthetic rate was unaffected by 1976 nitrogen treatments for same-age leaves.

    Nutrient relations of winter wheat:3. Nitrogen uptake, photosynthesis of flag leaves and translocation of nitrogen to grain · 1981 · compared with leaves of the same age

    Same directionCites this paper

  2. positive
    High-N wheat had greater photosynthetic capacity than low-N plants under well-watered conditions.

    The Effects of N Nutrition on the Water Relations and Gas Exchange Characteristics of Wheat (Triticum aestivum L.) · 1986 · compared with low-N plants

    Opposite direction

  3. positive
    The combined inoculation improved wheat photosynthetic rate by up to 73%.

    Ameliorating the Drought Stress for Wheat Growth through Application of ACC-Deaminase Containing Rhizobacteria along with Biogas Slurry · 2020 · compared with uninoculated controls

    Opposite direction

  4. positive
    Humic-acid-enriched coated fertilizer improved wheat photosynthetic parameters.

    New Eco-Friendly Polymeric-Coated Urea Fertilizers Enhanced Crop Yield in Wheat · 2020

    Opposite direction

  5. positive
    Application of 41 kg/ha nano chelated nitrogen fertilizer increased wheat photosynthesis rate by 21% compared with urea.

    Nano-fertilizer prevents environmental pollution and improves physiological traits of wheat grown under drought stress conditions · 2021 · compared with urea

    Opposite direction

  6. positive
    Combined organic manure and inorganic fertilizer gave higher flag-leaf photosynthetic rate, photosystem 2 activity, chlorophyll content, and leaf area index at mid grain filling than inorganic fertilizers alone.

    Effects of Long-Term Fertilization on Leaf Photosynthetic Characteristics and Grain Yield in Winter Wheat · 2004 · compared with only inorganic fertilizers

    Opposite direction

  7. positive
    M fertilizer raised Pn under both water conditions.

    Physiological mechanisms contributing to increased water-use efficiency in winter wheat under organic fertilization · 2017 · compared with CK

    Opposite direction

  8. positive
    Nitrogen fertilizer significantly decreased wheat canopy photosynthetic active radiation transmittance (PART) by 12.7–75.1%.

    Effects of Applied Ratio of Nitrogen on the Light Environment in the Canopy and Growth, Development and Yield of Wheat When Intercropped · 2021

    Opposite direction

124 papers more in this group

See all 133 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.