Intervention effectmodel-written summary

Leaf number increased significantly with nitrogen, phosphorus, and potassium fertilizer amount.

A claim from Biometry and Water Consumption of Sunflower as Affected by NPK Fertilizer and Available Soil Water Content under Semiarid Brazilian Conditions · 2014

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Leaf number increased significantly with nitrogen, phosphorus, and potassium fertilizer amount.

Taxon
SunflowerHelianthus annuust0
Treatment
N, P and K fertilizere0
Outcome
number of leavese0
Direction
increasede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

e0

“The number of leaves increased significantly with the amount of N, P and K fertilizer.”

✓ located verbatim in the source · abstract, characters 849–935
t0

“Sunflower”

✓ located verbatim in the source · title, characters 34–43

Title

Biometry and Water Consumption of Sunflower as Affected by NPK Fertilizer and Available Soil Water Content under Semiarid Brazilian Conditions

Lúcia Helena Garófalo Chaves; Hugo Orlando Carvallo Guerra; Vinícius Batista Campos; et al. Agricultural Sciences 2014. doi:10.4236/as.2014.58070

Other claims from this paper (6)

Record rev-baf797ec9caf79d5872d4350b2d96558ecbe27a2e0dfa134bc8758d9742360fc · schema claims-v0.9 · position 5 in the model’s answer

nitrogen · growth · Helianthus annuus (common sunflower)Results differ

76 papers: 63 positive, 13 negative or no effect

62 papers in the same direction as this claim · 12 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
    At 120 kg N ha-1, the highest sunflower heights were 120 cm in 2003 and 138 cm in 2004.

    Response of sunflower (Helianthus annuus L.) to nitrogen application in a savanna Alfisol · 2010

    Same directionCited by this paper

  2. positive
    Early sowing with 150 kg N ha-1 increased sunflower leaf area per plant.

    Quantitative and qualitative traits of sunflower (Helianthus annuus L.) as influenced by planting dates and nitrogen application · 2004 · compared with 30 August

    Same directionCited by this paper

  3. no effect
    Greater nitrogen did not affect canopy extinction coefficient (0.88) in sunflower.

    Effect of Specific Leaf Nitrogen on Radiation Use Efficiency and Growth of Sunflower · 1997

    Opposite direction

  4. negative
    Sunflower growth was considerably reduced at zero nitrate.

    ABSORPTION OF NITROGEN DIOXIDE BY SUNFLOWER PLANTS GROWN AT VARIOUS LEVELS OF NITRATE · 1986 · compared with 5 mM nitrate

    Opposite direction

  5. negative
    Shoot growth was critically damaged when soil containers were placed in nitrogen at early stages of growth before roots were well established.

    Effect of Duration and Timing of Low Soil Oxygen Content on Shoot and Root Growth · 1962

    Opposite direction

  6. negative
    Nitrogen addition damaged sunflower seedling growth, especially under high salinity

    Effects of Sodium Chloride and Mineral Nutrients on Initial Stages of Development of Sunflower Life · 2007

    Opposite direction

  7. no effect
    Nitrogen above 25 ppm did not increase stem diameter.

    Effect of Fertilizer‐N and Herbicides on the Growth and N Content of Sunflower1 · 1976

    Opposite direction

  8. negative
    High ammonium rates reduced sunflower root volume.

    Soluble fractions and kinetics parameters of nitrate and ammonium uptake in sunflower ("Neon" Hybrid) · 2015

    Opposite direction

67 papers more in this group

See all 76 papers →

potassium · growth · Helianthus annuus (common sunflower)Positive and negative results

21 papers: 18 positive, 3 negative or no effect

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

  1. negative
    Omitting potassium severely impaired sunflower vegetative growth and development.

    Effect of nutrient omission in the development of sunflower BRS-122 in greenhouse conditions · 2019

    Opposite direction

  2. no effect
    Potassium doses did not affect growth at 45 DAS.

    Growth and physiological responses of sunflower grown under levels of water replacement and potassium fertilization · 2016

    Opposite direction

  3. negative
    Potassium application decreased sunflower dry matter.

    Responses of Linoleic and High Oleic Type Sunflower Varieties (Helianthus Annuus L.) to Nitrogen and Potassium Applications · 2018

    Opposite direction

  4. positive
    Under saline conditions, foliar potassium salts improved sunflower shoot and root fresh weights and shoot dry weight.

    Growth and photosynthesis of salt‐stressed sunflower (Helianthus annuus) plants as affected by foliar‐applied different potassium salts · 2009

    Same direction

  5. positive
    K application significantly increased shoot and root lengths.

    Defensive Impact of Foliar Applied Potassium Nitrate on Growth Linked with Improved Physiological and Antioxidative Activities in Sunflower (Helianthus annuus L.) Hybrids Grown under Salinity Stress · 2021

    Same direction

  6. positive
    Potassium improved germination under highly saline conditions.

    Physiological response of sunflower seedlings to salinity and potassium supply · 1999

    Same direction

  7. positive
    Treatment T13 gave significantly higher plant height of 130.60 cm.

    Effect of Different Levels of Nitrogen, Sulphur and Foliar Application of Boron in Sunflower (Helianthus annuus L.) · 2017

    Same direction

  8. positive
    Potassium deficiency reduced sunflower growth in the presence of potassium comparison

    Effect of potassium on growth and the electrophoretic pattern of leaf proteins of sunflower supplied with ammonium or nitrate · 1990 · compared with in the presence of potassium

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

12 papers more in this group

See all 21 papers →

phosphorus · growth · Helianthus annuus (common sunflower)Positive and negative results

38 papers: 32 positive, 6 negative or no effect

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

  1. negative
    Low medium phosphate inhibited plant growth rate.

    Photosynthesis and chlorophyll fluorescence in sunflower (Helianthus annuus L.) leaves as affected by phosphorus nutrition · 1994

    Opposite direction

  2. negative
    Omitting phosphorus severely impaired sunflower vegetative growth and development.

    Effect of nutrient omission in the development of sunflower BRS-122 in greenhouse conditions · 2019

    Opposite direction

  3. negative
    Low P reduced sunflower total dry weight to 82% after 42 days.

    Understanding leaf area expansion in sunflower and wheat grown under low-phosphorus conditions · 1998

    Opposite direction

  4. no effect
    Grain size did not change with N and P.

    Root System, Phenology and Yield of Sunflower in Relation to Nitrogen and Phosphorus · 2015

    Opposite direction

  5. no effect
    PSB or phosphorus levels applied alone did not markedly influence sunflower growth parameters.

    EFFECTS OF PHOSPHORUS LEVELS, PHOSPHATE SOLUBILIZING BACTERIA APPLICATIONS AT VARYING DOSES AND TECHNIQUES ON PLANT STAND, OIL CONTENT AND YIELD OF SUNFLOWER (HELIANTHUS ANNUS L.) · 2024

    Opposite direction

  6. no effect
    Superphosphate phosphorus had no significant effect on studied growth parameters.

    EFFECT OF CADMIUM ON GROWTH OF SUNFLOWER PLANT GROWN IN CALCAREOUS SOIL · 1994

    Opposite direction

  7. positive
    Phosphate deficiency decreased leaf ATP, ADP, and adenylate energy charge.

    In vivo photosynthetic electron transport does not limit photosynthetic capacity in phosphate‐deficient sunflower and maize leaves · 1993

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

  8. positive
    Low nitrate or phosphate increased root:shoot ratio and uptake kinetic parameters.

    Nutrient-limited growth rates: quantitative benefits of stress responses and some aspects of regulation · 1995

    Same direction

29 papers more in this group

See all 38 papers →

3 of 4 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.