Search claims · PlantClaims

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Weed interference reduced nitrogen-use efficiency of maize genotypes.

Taxon: maizeZea mayse0
Treatment: weed interferencee0
Interactor: weede0weed
Outcome: nitrogen-use efficiencye0
Direction: reducede0

Not reportedComparator

Verbatim

e0
“The nitrogen-use efficiency of the maize genotypes was reduced due to weed interference”
✓ located verbatim in the source · abstract, characters 838–925

Title

Nitrogen-use Efficiency of Maize Genotypes under Weed Pressure in a Tropical Alfisol in Northern Nigeria

Azeez, JO.; Adetunji, MT. DOAJ (DOAJ: Directory of Open Access Journals) 2007

Other claims from this paper (8)

Observation Oba super II and Low N pool C2 had significantly higher grain yield than the other cultivars.
Observation Oba super II and Low N pool C2 had significantly higher nitrogen uptake, utilization, and use efficiency than the other cultivars.
Observation At 90 kg N.ha-1, maize shoots recovered 68 kg N.ha-1.
Observation At 90 kg N.ha-1, weed nitrogen uptake was 15.98 kg.ha-1.
Observation At 30 kg N.ha1, weed uptake was 28.38.
Observation At 30 kg N.ha1, maize shoot nitrogen uptake was 23.35 kg N.ha-1.
Intervention effect Fertilizer addition enhanced maize competitive ability.
Observation Residual soil nitrate did not differ among nitrogen rates and genotypes.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Plant nitrogen use efficiency decreased with greater arbuscular mycorrhizal fungal colonization.

Taxon: plante1
Interactor: arbuscular mycorrhizal fungie0symbiont
Outcome: NUEe0
Direction: decreasede0

Verbatim

e0
“NUE decreased with the intensity of colonization by arbuscular mycorrhizal fungi”
✓ located verbatim in the source · abstract, characters 926–1006

e1
“plant nitrogen (N) uptake (Nup) and N use efficiency (NUE)”
✓ located verbatim in the source · abstract, characters 141–199

Title

Nitrogen deposition and climate drive plant nitrogen uptake while soil factors drive nitrogen use efficiency in terrestrial ecosystems

Helena Vallicrosa; Katrin Fleischer; Manuel Delgado-Baquerizo; et al. Earth System Dynamics 2025. doi:10.5194/esd-16-1183-2025

Other claims from this paper (12)

Association Plant N uptake was primarily driven by N deposition.
Association Plant N uptake increased in warmer areas.
Association Plant N uptake increased in wetter areas.
Association Nitrogen use efficiency was driven by soil biotic and abiotic factors.
Association Plant nitrogen use efficiency increased with soil pH.
Association Plant nitrogen use efficiency increased with soil microbial stocks.
Association Plant N uptake was higher at tropical latitudes.
Association Plant N use efficiency was higher toward the poles.
Association Total soil N stocks did not drive plant nitrogen uptake.
Association Total soil N stocks did not drive plant nitrogen use efficiency.
Method / resource TRENDY models may overestimate tropical plant N uptake by about 100 Tg N yr−1.
Method / resource TRENDY models may triple the standard deviation of plant N uptake at boreal latitudes.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

B. alnoides nitrogen use efficiency was much lower in nitrogen-fixing mixtures.

Taxon: B. alnoidesBetula alnoidese1
Treatment: FN mixturese0
Outcome: N use efficiency (NUE)e0
Direction: much lowere0

Verbatim

e0
“its N use efficiency (NUE) was much lower in the FN mixtures”
✓ located verbatim in the source · abstract, characters 1796–1856

e1
“height-diameter relationship of B. alnoides”
✓ located verbatim in the source · abstract, characters 1147–1190

Title

Tree allometry responses to competition and complementarity in mixed-species plantations of Betula alnoides

Boyao Chen; Kaili Liu; Chunsheng Wang; et al. Forest Ecosystems 2024. doi:10.1016/j.fecs.2024.100207

Other claims from this paper (9)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrate-favoring nitrogen cycling correlated with a twofold reduction in photosynthetic nitrogen use efficiency.

Taxon: Pinus sylvestrisPinus sylvestrist0
Compound: nitratee0
Outcome: photosynthetic nitrogen use efficiencye0
Direction: reductione0
Value: twofolde0

Verbatim

e0
“Variation in inorganic nitrogen cycling which favored the accumulation of nitrate under eCO2 was also correlated with a twofold reduction in photosynthetic nitrogen use efficiency”
✓ located verbatim in the source · abstract, characters 1776–1955

t0
“Pinus sylvestris”
✓ located verbatim in the source · title, characters 56–72

Title

Soil microbial community differences drive variation in Pinus sylvestris physiology, productivity, and responses to elevated CO2

Hupperts, Stefan Epsilon Open Archive (Sveriges lantbruksuniversitet biblioteket (Swedish University of Agricultural Sciences)) 2026

Other claims from this paper (8)

Intervention effect Elevated CO2 stimulated pine seedling productivity only with living soil inoculant.
Intervention effect Elevated CO2 improved pine photosynthetic nitrogen use efficiency only with living soil inoculant.
Association The magnitude of the elevated CO2 response depended on forest soil inoculant source.
Association The response was linked to a 70% increase in bacterial species richness.
Association The response was linked to increased relative abundance of growth-promoting bacteria.
Association The response coincided with a shift in saprotrophic fungal composition and root growth.
Observation Inorganic nitrogen cycling under elevated CO2 favored nitrate accumulation.
Intervention effect Different microbial communities affected pine productivity more strongly than doubled atmospheric CO2.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Azalea nitrogen use efficiency correlated negatively with nirS and nirK abundance.

Taxon: RhododendronRhododendront0
Gene: nirS and nirKe6
Outcome: nitrogen use efficiencye6
Direction: negativelye6

Verbatim

t0
“Rhododendron growth”
✓ located verbatim in the source · title, characters 38–57

e6
“Correlation analysis indicated that nitrogen use efficiency correlated positively with AOA and AOB, but negatively with nirS and nirK abundance”
✓ located verbatim in the source · abstract, characters 1553–1696

Title

Diluted pyroligneous vinegar promoted Rhododendron growth by changing functional genes involved in N cycling in the rhizosphere

Huimin Zhou; Lisi He; Xiaoqing Liu; et al. Geoderma 2023. doi:10.1016/j.geoderma.2023.116628

Other claims from this paper (13)

Intervention effect Pyroligneous vinegar treatments increased azalea plant biomass by 51%-99% compared with NPK alone.
Intervention effect Pyroligneous vinegar treatments increased azalea root length by 29%-81% compared with NPK alone.
Intervention effect Pyroligneous vinegar treatments increased azalea root surface area by 63%-151% compared with NPK alone.
Intervention effect Pyroligneous vinegar treatments increased nitrogen use efficiency of azalea by 83%-299% compared with NPK alone.
Intervention effect Pyroligneous vinegar treatments decreased rhizosphere soil pH compared with the NPK fertilizer.
Intervention effect Pyroligneous vinegar treatments increased rhizosphere soil dissolved organic carbon and nitrate compared with the NPK fertilizer.
Intervention effect Pyroligneous vinegar treatments changed the potential denitrification activity of the rhizosphere compared with the NPK fertilizer.
Intervention effect Compared with NPK, pyroligneous vinegar increased archaeal amoA gene (AOA) abundance by 45% − 79% in nitrification.
Intervention effect Compared with NPK, pyroligneous vinegar increased bacterial amoA gene (AOB) abundance by 39% − 75% in nitrification.
Intervention effect Compared with NPK, pyroligneous vinegar inhibited denitrification gene (nirS and nirK) abundances by up to 21%.
Intervention effect Pyroligneous vinegar increased the ratio of nosZ to nirS plus nirK compared with the NPK fertilizer.
Association Azalea nitrogen use efficiency correlated positively with AOA and AOB abundance.
Recommendation The authors suggest pyroligneous vinegar could be a potential soil amendment in protected horticulture.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Loss of nitrogen fixation during drought was associated with lower water use efficiency.

Taxon: common beanPhaseolus vulgarist0
Treatment: Loss of nitrogen fixatione0
Outcome: water use efficiencye0
Direction: lowere0
Qualifier: under drought conditionse0

Verbatim

e0
“Loss of nitrogen fixation under drought conditions was further associated with lower water use efficiency, measured as carbon isotope ratio of 13 C/ 12 C”
✓ located verbatim in the source · abstract, characters 572–725

t0
“common bean”
✓ located verbatim in the source · title, characters 27–38

Title

Role of fixing nitrogen in common bean growth under water deficit conditions

Berhanu Amsalu Fenta; Stephen E. Beebe; Karl J. Kunert Food and Energy Security 2019. doi:10.1002/fes3.183

Other claims from this paper (11)

Intervention effect Drought reduced growth across all bean lines.
Intervention effect Drought decreased chlorophyll content, especially in DOR 364-NN and BAT 477-NN.
Intervention effect Drought reduced nodule size most in DOR 364, by 21.6%.
Association Loss of nitrogen fixation during drought was associated with lower shoot nitrogen percentage.
Association Loss of symbiotic nitrogen fixation in DOR 364-NN and BAT 477-NN negatively affected root architecture during drought.
Observation Under drought, BAT 477-NN had about 50% lower root architectural trait values.
Association Nitrogen fixation capability was associated with better harvest index and seed yield.
Association Well-watered nitrogen-fixing lines had higher harvest index than nonfixing lines.
Association Well-watered fixing lines yielded 2.6–2.8 t/ha versus 1.4 t/ha in nonfixing lines.
Intervention effect Drought lowered harvest index in all tested lines, significantly only in DOR 364-NN.
Intervention effect Drought lowered seed yield in all tested lines, significantly in DOR 364-NN and BAT 477-NN.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrate accumulation under elevated CO2 correlated with a twofold reduction in photosynthetic nitrogen use efficiency.

Taxon: Pinus sylvestrisPinus sylvestrist0
Treatment: eCO 2e0
Compound: nitratee0
Outcome: photosynthetic nitrogen use efficiencye0
Direction: reductione0
Value: twofolde0

Verbatim

e0
“accumulation of nitrate under eCO 2 was also correlated with a twofold reduction in photosynthetic nitrogen use efficiency”
✓ located verbatim in the source · abstract, characters 1854–1976

t0
“Pinus sylvestris”
✓ located verbatim in the source · title, characters 56–72

Title

Soil microbial community differences drive variation in Pinus sylvestris physiology, productivity, and responses to elevated CO2

Mark A. Anthony; Nora Röckel; Alexandra Traistaru; et al. Environmental Microbiome 2025. doi:10.1186/s40793-025-00828-w

Other claims from this paper (8)

Intervention effect Elevated CO2 stimulated seedling productivity with living versus sterilized soil inoculant.
Intervention effect Elevated CO2 improved photosynthetic nitrogen use efficiency only with living soil inoculant.
Association The elevated CO2 response depended on forest soil inoculant source.
Association The response was linked to 70% higher bacterial richness.
Association The response was linked to increased abundance of beneficial bacteria.
Association The response coincided with a shift in saprotrophic fungal community composition.
Association The response coincided with altered root growth.
Association Different microbial communities affected productivity more strongly than doubled atmospheric CO2.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Phosphorus use efficiency was minimal under highest phosphorus, no nitrogen and PGPR.

Taxon: SPRING WHEATTriticum aestivumt0
Treatment: highest level of phosphorus and control level of nitrogen and PGPRe0
Interactor: PGPRe0symbiont
Outcome: PHOSPHORUS USE EFFICIENCYt0
Direction: minimume0

Verbatim

e0
“minimum of this trait was observed at highest level of phosphorus and control level of nitrogen and PGPR”
✓ located verbatim in the source · abstract, characters 1015–1119

t0
“PHOSPHORUS USE EFFICIENCY OF SPRING WHEAT (TRITICUM AESTIVUM L.)”
✓ located verbatim in the source · title, characters 13–77

Title

NITROGEN AND PHOSPHORUS USE EFFICIENCY OF SPRING WHEAT (TRITICUM AESTIVUM L.) AS AFFECTED BY SEED INOCULATION WITH PLANT GROWTH PROMOTING RHIZOBACTERIA (PGPR)

Panahyian Kivi Mehdi; Saeid Hokmalipour; Hamele Darbandi Maryam International Journal of Advanced Biological and Biomedical Research 2014

Other claims from this paper (6)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher nitrogen dose with bacterial inoculation reduced crop nitrogen-use efficiency.

Taxon: cornZea mays subsp. mayse0
Treatment: increase in N dosee0
Interactor: A. brasilenseAzospirillum brasilensee0symbiont
Second interactor: H. seropedicaeHerbaspirillum seropedicaee0symbiont
Outcome: N use efficiency by the crope0
Direction: reducese0

Verbatim

e0
“The increase in N dose associated with the inoculation of A. brasilense and H. seropedicae promotes an increase in the N from the fertilizer in corn grains and shoot and reduces the N use efficiency by the crop”
✓ located verbatim in the source · abstract, characters 1117–1327

Title

Effect of nitrogen fertilization associated with diazotrophic bacteria inoculation on nitrogen use efficiency and its biological fixation by corn determined using 15N

de Oliveira Araujo Erica; Reis Martins Marcio; Carlos Tadeu Vitorino Antonio; et al. African Journal of Microbiology Research 2015. doi:10.5897/ajmr2014.7072

Other claims from this paper (7)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing wild mustard density decreased wheat yield, yield components and nitrogen use efficiency.

Taxon: wheatTriticum aestivumt0
Treatment: increasing wild mustard densitye1
Interactor: wild mustarde1weed
Outcome: yield, yield components and nitrogen use efficiencye1
Direction: decreasede1

Verbatim

t0
“Influences of Different Nitrogen Levels on Competition between Spring Wheat (Triticum aestivum L.) and Wild Mustard (Sinapis arvensis L.)”
✓ located verbatim in the source · title, characters 0–137

e1
“yield, yield components and nitrogen use efficiency of wheat were decreased with increasing wild mustard density”
✓ located verbatim in the source · abstract, characters 491–603

Title

Influences of Different Nitrogen Levels on Competition between Spring Wheat (Triticum aestivum L.) and Wild Mustard (Sinapis arvensis L.)

Pejman Behdarvand; Ganesh Shridhar Chinchanikar; Kondiram Nathuji Dhumal Journal of Agricultural Science 2012. doi:10.5539/jas.v4n12p134

Other claims from this paper (9)

“nitrogen use efficiency”

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