Intervention effectmodel-written summary

Elevated CO2 with high nitrogen increased panicle and grain numbers.

A claim from Growth, Yield and Grain Mineral Nutrient Responses of Rice to Elevated Atmospheric CO2 Concentration and Nitrogen Fertilization · 2009

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Elevated CO2 with high nitrogen increased panicle and grain numbers.

Treatment
Elevated CO2 + high Ne0
Outcome
numbers of panicles and grainse0
Direction
enlargede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Elevated CO2 + high N enlarged the yield capacity in terms of the numbers of panicles and grains”

✓ located verbatim in the source · abstract, characters 606–702
t0

“Rice”

✓ located verbatim in the source · title, characters 54–58

Title

Growth, Yield and Grain Mineral Nutrient Responses of Rice to Elevated Atmospheric CO2 Concentration and Nitrogen Fertilization

Katsu IMAI; Mayumi TAKEI-SAKUMA Environment Control in Biology 2009. doi:10.2525/ecb.47.179

Other claims from this paper (8)

Record rev-9795da0c4e7481de76fe62dbba63d9422ab8d6acc7a300f65840eacaa286c9ed · schema claims-v0.9 · position 7 in the model’s answer

co2 · yield · Oryza sativa (rice)Positive and negative results

159 papers: 131 positive, 28 negative or no effect

130 papers in the same direction as this claim · 28 in the opposite direction

  1. positive
    Higher CO2 promoted rice dry matter production.

    Effect of Carbon Dioxide Concentration on Growth and Dry Matter Production of Crop Plants · 1978

    Same directionCited by this paper

  2. positive
    High CO2 promoted rice growth and dry matter production.

    Effects of Atmospheric Partial Pressure of CO2 and Phosphorus Nutrition on Growth of Young Rice Plants. · 1996

    Same directionCited by this paper

  3. negative
    The crop model projected a rice yield decline of 0.69 t/ha under elevated CO2 (383 to 574 ppm) with a 2 C temperature rise.

    The Economic Impacts of Climate Change on the Rice Production in Malaysia · 2010

    Opposite direction

  4. negative
    Rising CO2 significantly decreased the plant relative yield of seed for cultivated rice CL161 at both competitive densities.

    Competitive Interactions between Cultivated and Red Rice as a Function of Recent and Projected Increases in Atmospheric Carbon Dioxide · 2010

    Opposite direction

  5. negative
    Elevated carbon dioxide marginally decreased filled grains per rice panicle.

    Effect of elevated [CO2] and nutrient management on wet and dry season rice production in subtropical India · 2015 · compared with ambient environment

    Opposite direction

  6. negative
    Elevated CO2 reduced yield of IR 36 by 11–13%.

    Effect of elevated [CO2] on yield, intra‐plant nutrient dynamics, and grain quality of rice cultivars in eastern India · 2018

    Opposite direction

  7. no effect
    The rate of change of individual plant yield with density was unchanged by CO2 in 1998.

    Ozone and density affect the response of biomass and seed yield to elevated CO2 in rice · 2007

    Opposite direction

  8. negative
    Elevated CO2 did not compensate for the negative yield effect of elevated temperature.

    Elevated CO2 and temperature under future climate change increase severity of rice sheath blight · 2023 · compared with elevated temperature

    Opposite direction

150 papers more in this group

See all 159 papers →

nitrogen · yield · Oryza sativa (rice)Positive and negative results

2,045 papers: 1,803 positive, 242 negative or no effect

1,802 papers in the same direction as this claim · 193 in the opposite direction · 49 reporting no difference from an alternative

  1. negative
    Green manure and rice straw nitrogen, alone or in combination with inorganic N, gave lower grain yield, agronomic efficiency and apparent nitrogen uptake than a standard split application of prilled urea.

    Long-term Comparison of the Agronomic Efficiency and Residual Benefits of Organic and Inorganic Nitrogen Sources for Tropical Lowland Rice · 1996 · compared with a standard split application of prilled urea

    Opposite direction

  2. negative
    Chaffy grain number and chaffy grain weight per 5 panicles increased significantly with enhancing nitrogen doses.

    Physiological response of rice (Oryza sativaL.) genotypes to elevated nitrogen applied under field conditions · 2014

    Opposite direction

  3. negative
    Excessive nitrogen yielded 2.68–6.31% less than appropriate nitrogen application.

    Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains · 2022 · compared with appropriate nitrogen application (270 kg N ha−1)

    Opposite direction

  4. negative
    SCU reduced rice yield, though not significantly.

    Effects of different types of slow- and controlled-release fertilizers on rice yield · 2021

    Opposite direction

  5. negative
    Preflood urea applied 14 days early yielded lowest grain yield of rice.

    Ammonia Volatilization and Nitrogen Uptake for Conventional and Conservation Tilled Dry‐Seeded, Delayed‐Flood Rice · 2007

    Opposite direction

  6. no effect
    Applying 30 kg N ha−1 at each SPAD drop below 37.5 gave rice yields equivalent to 120 kg N ha−1 applied in three splits

    Chlorophyll Meter– and Leaf Color Chart–Based Nitrogen Management for Rice and Wheat in Northwestern India · 2002 · compared with 120 kg N ha−1 applied in three splits

    Opposite direction

  7. no effect
    Ammonium sulphate nitrate gave growth, yield and grain nitrogen results statistically at par with Super Net.

    EFFECT OF NITROGEN FERTILIZERS ON GROWTH, YIELD AND QUALITY OF HYBRID RICE (ORYZA SATIVA) · 2005 · compared with sulphur-containing nitrogen fertilizer-Super Net

    Opposite direction

  8. negative
    Rice straw plus urea mix-application (SU) gave lower rice plant growth, yield and nutrient accumulation.

    Application of different organic and mineral fertilizers on the growth, yield and nutrient accumulation of rice in a Japanese ordinary paddy field · 2010

    Opposite direction

2,036 papers more in this group

See all 2,045 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.