Intervention effectmodel-written summary

BSRNF-U100 increased rice nitrogen use efficiency to 12%.

A claim from Synthesis of biochar‐embedded slow‐release nitrogen fertilizers: Mesocosm and field scale evaluation for nitrogen use efficiency, growth and rice yield · 2023

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

BSRNF-U100 increased rice nitrogen use efficiency to 12%.

Treatment
biochar‐embedded slow‐release N fertilizer 100% urea‐N (BSRNF‐U100)e0
Outcome
NUEe0
Direction
increasee0
Value
12%e0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

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

“Application of biochar‐embedded slow‐release N fertilizer 100% urea‐N (BSRNF‐U100) augmented plant growth to increase grain yield (6610 kg ha −1 ), straw yield (9612 kg ha −1 ) and NUE (12%) in rice”

✓ located verbatim in the source · abstract, characters 1048–1246

Title

Synthesis of biochar‐embedded slow‐release nitrogen fertilizers: Mesocosm and field scale evaluation for nitrogen use efficiency, growth and rice yield

Mohamed Roshan Abu Firnassa Mustaffa; Kannan Pandian; Swaminathan Chitraputhirapillai; et al. Soil Use and Management 2023. doi:10.1111/sum.12959

Other claims from this paper (7)

Record rev-11aec38bb1dbc8265810bbd81d7073f2bb64f636878b457ca5353f7fbed3a9ad · schema claims-v0.9 · position 8 in the model’s answer

biochar · nutrient: efficiency · Oryza sativa (rice)Positive and negative results

19 papers: 14 positive, 5 negative or no effect

13 papers in the same direction as this claim · 4 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
    Biochar lowered the internal K use efficiency of rice, which the authors read as a sign that K uptake may benefit from biochar.

    The Short-Term Effects of Rice Straw Biochar, Nitrogen and Phosphorus Fertilizer on Rice Yield and Soil Properties in a Cold Waterlogged Paddy Field · 2018

    Opposite direction

  2. no effect
    Neither biochar treatment influenced rice nitrogen use efficiency or grain yield.

    Biochar application mode influences nitrogen leaching and NH3 volatilization losses in a rice paddy soil irrigated with N-rich wastewater · 2017

    Opposite direction

  3. no effect
    Biochar did not influence Zhongkejiayou12-6 seedling NUE in either soil.

    Influence of Biochar on Nitrogen Use Efficiency and Root Morphology ofRice-Seedling in Two Contrasting Paddy Soils · 2020

    Opposite direction

  4. negative
    In 2022, biochar (CC or RH) combined with chemical fertilizers reduced the agronomic N, P and K use efficiency for N by 39.91 relative to control plots.

    Rice Productivity, Nutrients Use Efficiencies and Water Productivity on a Biochar-amended Soil in a Typical Lowland Rice System in Benin · 2025 · compared with control plots

    Opposite direction

  5. no effect
    Plant uptake nitrogen use efficiency did not differ significantly between chemical and biochar-loaded nitrogen.

    [Effects of Returning Nitrogen by Biochar Loading on Paddy Growth, Root Morphology, and Nitrogen Use Efficiency]. · 2018 · compared with chemical nitrogen

    No difference from an alternative

  6. positive
    Biochar application increased internal N use efficiency by 7-11% in the fifth and sixth seasons.

    Continuous applications of biochar to rice: Effects on nitrogen uptake and utilization · 2018

    Same direction

  7. positive
    Biochar and nitrogen fertilizer together increased rice agronomic efficiency by 140% over two years.

    Effects of biochar and nitrogen fertilizer on soil physicochemical properties, nitrogen use efficiency and upland rice (Oryza sativa) yield grown on an Alfisol in Southwestern Nigeria · 2019

    Same direction

  8. positive
    Biochar incorporation further improved apparent N recovery of rice by 25.7–150.5% over N100.

    Nitrogen Fertilizer Reduction Combined with Biochar Application Maintain the Yield and Nitrogen Supply of Rice but Improve the Nitrogen Use Efficiency · 2022 · compared with N100

    Same direction

10 papers more in this group

See all 19 papers →

fertilization · nutrient: efficiency · Oryza sativa (rice)Positive and negative results

220 papers: 202 positive, 18 negative or no effect

201 papers in the same direction as this claim · 12 in the opposite direction · 6 reporting no difference from an alternative

  1. no effect
    N use efficiency indices except PFPN did not differ significantly between fertilizer treatments.

    Effects of single basal application of coated compound fertilizer on yield and nitrogen use efficiency in double-cropped rice · 2017

    Opposite direction

  2. no effect
    Agronomic and recovery nitrogen use efficiencies and unaccounted nitrogen did not differ significantly between mineral and slurry at the same ammonium rate.

    Response of paddy rice to fertilisation with pig slurry in northeast Spain: Strategies to optimise nitrogen use efficiency · 2017 · compared with mineral

    Opposite direction

  3. negative
    Green manure and rice straw nitrogen gave lower agronomic efficiency than split 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 standard split application of prilled urea

    Opposite direction

  4. negative
    Increasing N fertilizer rates decreased apparent N recovery and N use efficiency of rice.

    Effect of nitrogen rates on rice growth and biological nitrogen fixation · 1996

    Opposite direction

  5. negative
    The farmers practice of applying half of the recommended N as basal dose recorded the least agronomic efficiency and response ratio.

    Judicious Fertilizer N Split for Higher Use Efficiency in Transplanted Rice · 2001

    Opposite direction

  6. negative
    Higher fertilizer nitrogen decreased N recovery efficiency.

    Impact of different fertilizer-N application on growth and yield formation of transplanted rice under zero tillage and conventional tillage conditions · 2004

    Opposite direction

  7. no effect
    Rice nitrogen use efficiency at 65 to 75% PCF was not different from the control.

    Effects of PAA (Polyaspartic Acid) Contained Complex Fertilizer on Rice Growth and CH4emission from Rice Cultivation · 2013 · compared with control

    Opposite direction

  8. no effect
    Phosphorus fertilization had no significant effect on nitrogen use efficiency in upland rice landraces.

    Variation in nitrogen uptake efficiency in upland rice landraces as influenced by P fertilization · 2016

    Opposite direction

211 papers more in this group

See all 220 papers →

nitrogen · nutrient: efficiency · Oryza sativa (rice)Positive and negative results

262 papers: 217 positive, 45 negative or no effect

216 papers in the same direction as this claim · 41 in the opposite direction · 4 reporting no difference from an alternative

  1. negative
    Reducing the nitrogen rate lowered nitrogen use efficiency.

    Effect of side deep placement of nitrogen on yield and nitrogen use efficiency of single season late japonica rice · 2021

    Opposite direction

  2. negative
    One basal nitrogen split gave the lowest agronomic efficiency.

    Optimizing Nitrogen Options for Improving Nitrogen Use Efficiency of Rice under Different Water Regimes · 2019

    Opposite direction

  3. no effect
    At low N application rates, crop yields and NUE did not significantly increase with manure substitution.

    Effect of replacing synthetic nitrogen fertilizer with animal manure on grain yield and nitrogen use efficiency in China: a meta‐analysis · 2023

    Opposite direction

  4. negative
    Rice N partial factor productivity was about 20% lower in fields with inefficient N management than in fields with efficient N management.

    Rice yield gaps and nitrogen-use efficiency in the Northwestern Indo-Gangetic Plains of India: Evidence based insights from heterogeneous farmers’ practices · 2021 · compared with fields with efficient N management

    Opposite direction

  5. negative
    Agronomic nitrogen use efficiency decreased as nitrogen rate increased.

    Effects of nitrogen application rate and hill density on rice yield and nitrogen utilization in sodic saline–alkaline paddy fields · 2021

    Opposite direction

  6. negative
    Zero nitrogen gave significantly higher PNUE.

    Genotypic variation in traditional rice varieties for chlorophyll content, SPAD value and nitrogen use efficiency · 1970

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

  7. negative
    High nitrogen application led to lower nitrogen use efficiency.

    Intensification of rice-based farming systems in Central Luzon, Philippines: Constraints at field, farm and regional levels · 2018

    Opposite direction

  8. negative
    160 kg N/ha reduced agronomic efficiency of N use at both sites.

    Nitrogen and Zinc Interaction Improves Yield and Quality of Submerged Basmati Rice (Oryza sativa L.) · 2014

    Opposite direction

253 papers more in this group

See all 262 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.