Intervention effectmodel-written summary

Nitrogen fertilizer significantly increased rice tiller number versus no nitrogen.

A claim from Research of Nitrogen Application on Super Rice Yield and Nitrogen Efficiency in Jilin Province · 2012

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Nitrogen fertilizer significantly increased rice tiller number versus no nitrogen.

Treatment
nitrogen fertilizere0
Outcome
number of tillerse0
Direction
increasede0
Comparator
no nitrogen fertilizere0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier

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

“Compared with no nitrogen fertilizer,nitrogen fertilizer increased the number of tillers of rice significantly”

✓ located verbatim in the source · abstract, characters 564–674

Title

Research of Nitrogen Application on Super Rice Yield and Nitrogen Efficiency in Jilin Province

Yubo Qin Jilin Agricultural Sciences 2012

Other claims from this paper (5)

Record rev-b67e24dc923765a0138103a3a22105912161e9d04c6994978e6d16c7298b8c75 · schema claims-v0.9 · position 5 in the model’s answer

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

3,455 papers: 3,183 positive, 272 negative or no effect

3,182 papers in the same direction as this claim · 207 in the opposite direction · 65 reporting no difference from an alternative

  1. no effect
    Current high nitrogen practices do not significantly raise crop yields relative to optimum fertilization.

    Reducing environmental risk by improving N management in intensive Chinese agricultural systems · 2009 · compared with knowledge-based optimum N fertilization

    Opposite direction

  2. no effect
    CRFs had no effect on crop yield.

    Effect of Enhanced Efficiency Fertilizers on Nitrous Oxide Emissions and Crop Yields: A Meta‐analysis · 2016

    Opposite direction

  3. negative
    The authors found fertilizer and irrigation investment had limited effects on rice production.

    Moving toward rice self-sufficiency in sub-Saharan Africa by 2030: Lessons learned from 10 years of the Coalition for African Rice Development · 2021

    Opposite direction

  4. 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

  5. negative
    Without P fertilization, rice produced no panicles or grain.

    Nitrogen, Phosphorus and Potassium Interactions in Upland Rice · 2014

    Opposite direction

  6. negative
    Broadcast and split prilled urea left 11 to 35% of applied nitrogen unrecovered at harvest.

    Nitrogen‐15 Balance and Residual Effects of Urea‐N in Wetland Rice Fields as Affected by Deep Placement Techniques · 1984

    Opposite direction

  7. no effect
    Cow dung manure rates did not significantly affect grain yield or greenhouse gas emissions.

    Influence of rice varieties, organic manure and water management on greenhouse gas emissions from paddy rice soils · 2021

    Opposite direction

  8. negative
    Rice grain yield declined under control and sub-optimal fertilizer inputs.

    Yield trends and nutrient budgeting under a long-term (28 years) nutrient management in rice-wheat cropping system under subtropical climatic condition · 2014

    Opposite direction

3,446 papers more in this group

See all 3,455 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.