Intervention effectmodel-written summary

Pre-waterlogging nitrogen marginally improved SPAD in both canola types.

A claim from Optimizing Nitrogen Supplementation: Timing Strategies to Mitigate Waterlogging Stress in Winter- and Spring-Type Canola · 2025

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pre-waterlogging nitrogen marginally improved SPAD in both canola types.

Treatment
nitrogen application one week prior to the onset of waterlogginge0
Outcome
soil plant analysis development (SPAD) valuese0
Direction
improvede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

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

Brassica napus var. napus
Brassica napus var. napus · Taxoncontri from Yonezawa-Shi, Yamagata, Japan · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“nitrogen application one week prior to the onset of waterlogging marginally improved soil plant analysis development (SPAD) values in the two types of canola”

✓ located verbatim in the source · abstract, characters 791–948

Title

Optimizing Nitrogen Supplementation: Timing Strategies to Mitigate Waterlogging Stress in Winter- and Spring-Type Canola

Haochen Zhao; Onusha Sharmita; Abu Bakar Siddique; et al. Plants 2025. doi:10.3390/plants14172641

Other claims from this paper (5)

Record rev-5fc95ee237feaaace72f9a2dcbac6f2a76b149a7bfafca3881eac3e011bf7fec · schema claims-v0.9 · position 1 in the model’s answer

flooding · growth · Brassica napus (oilseed rape)Positive and negative results

30 papers: 6 positive, 24 negative or no effect

5 papers in the same direction as this claim · 24 in the opposite direction

  1. negative
    Waterlogging adversely affected oilseed rape seedling growth during stress and recovery after flooding.

    Effects of waterlogging on growth and nutrient uptake in oilseed rape seedlings · 2013

    Opposite directionCited by this paper

  2. positive
    Nitrogen after waterlogging increased dry matter accumulation.

    Effects of supplemental nitrogen application on physiological characteristics, dry matter and nitrogen accumulation of winter rapeseed (Brassica napus L.) under waterlogging stress · 2020

    Same directionCited by this paper

  3. negative
    Waterlogging for at least three days significantly depressed oilseed rape growth.

    Soil Enzyme Activity in Soils Subjected to Flooding and the Effect on Nitrogen and Phosphorus Uptake by Oilseed Rape · 2019 · compared with a control treatment without waterlogging (CK)

    Opposite direction

  4. negative
    Waterlogging at BBCH 31 affected plant growth and nutrient accumulation in oilseed rape.

    Waterlogging events during stem elongation or flowering affect yield of oilseed rape (Brassica napus L.) but not seed quality · 2017

    Opposite direction

  5. negative
    Flash waterlogging restricted plant growth.

    A Comparison of Screening Methods to Identify Waterlogging Tolerance in the Field in Brassica napus L. during Plant Ontogeny · 2014

    Opposite direction

  6. no effect
    Hypoxia pretreatment did not change final lateral or adventitious root number or length.

    A lack of aerenchyma and high rates of radial oxygen loss from the root base contribute to the waterlogging intolerance of Brassica napus · 1999

    Opposite direction

  7. negative
    Brief waterlogging periods in December and January or in May (10 days each) made plants slightly shorter.

    Effects of waterlogging at different stages of development on the growth and yield of winter oilseed rape (Brassica napus L.) · 1980

    Opposite direction

  8. negative
    Flooding gave lower canola emergence than spraying, at 19% versus 31%.

    Lime improves emergence of canola on an acidic, hardsetting soil · 2003 · compared with spraying

    Opposite direction

21 papers more in this group

See all 30 papers →

nitrogen · growth · Brassica napus (oilseed rape)Positive and negative results

82 papers: 65 positive, 17 negative or no effect

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

  1. negative
    Nitrogen-deficient rapeseed roots became longer.

    Adaption of Roots to Nitrogen Deficiency Revealed by 3D Quantification and Proteomic Analysis · 2018

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

  2. no effect
    Reducing BCU nitrogen application by 20% had no negative effect on oilseed rape biomass.

    Application of biochar-coated urea controlled loss of fertilizer nitrogen and increased nitrogen use efficiency · 2021

    Opposite direction

  3. negative
    Ammonium and urea harmed oilseed rape growth in hydroponics.

    Hydroponics versus field lysimeter studies of urea, ammonium and nitrate uptake by oilseed rape(Brassica napus L.) · 2012

    Opposite direction

  4. no effect
    Nitrogen deficiency did not change leaf mass per area.

    Nutrition-mediated cell and tissue-level anatomy triggers the covariation of leaf photosynthesis and leaf mass per area · 2020

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

  5. negative
    Nitrogen limitation improved primary and lateral roots in rapeseed.

    Genome-Wide Differential DNA Methylation and miRNA Expression Profiling Reveals Epigenetic Regulatory Mechanisms Underlying Nitrogen-Limitation-Triggered Adaptation and Use Efficiency Enhancement in Allotetraploid Rapeseed · 2020

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

  6. negative
    High-rate distillers grain reduced canola seedling germination and emergence.

    EFFECT OF SOIL AMENDMENT WITH ALFALFA POWDERS AND DISTILLERS GRAINS ON NUTRITION AND GROWTH OF CANOLA · 2011

    Opposite direction

  7. negative
    Seedrow urea reduced canola emergence at all rates, particularly high rates.

    EFFECTIVENESS OF SEEDROW-PLACED N WITH POLYMER-COATED AND NBPT-TREATED UREA FOR CANOLA AND WHEAT · 2013

    Opposite direction

  8. no effect
    Direct immersion in liquid nitrogen left germination of air-dried B. napus seeds without a significant difference from non-cooled controls.

    Cryopreservation of lipid-rich seeds: effect of moisture content and cooling rate on germination. · 2002 · compared with control seeds (air-dried, non-cooled)

    Opposite direction

73 papers more in this group

See all 82 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.