Search claims · PlantClaims

Observationobservedoriginal resultmeasured

Claim · model-written summary

Two Poa species showed their highest C/N ratios in summer, which correlated with higher microbial C/N ratios.

Taxon: Poa spp.Poae0
Outcome: highest C/N ratiose0
Qualifier: during the summer, which further correlated with higher microbial C/N ratiose0

Verbatim

e0
“two Poa spp. showed the highest C/N ratios during the summer, which further correlated with higher microbial C/N ratios”
✓ located verbatim in the source · abstract, characters 3308–3427

Title

Seasonal Relationships of Alpine Plants and Microbes through a Stoichiometric and Enzymatic Lens

Adam Ruka; Johannes Scheichhart; Jiří Doležal; et al. ARPHA Conference Abstracts 2023. doi:10.3897/aca.6.e108599

Other claims from this paper (4)

Associationobservedoriginal resultmeasured

Claim · model-written summary

Foliar lignin:N ratios correlated with soil C:N ratios.

Taxon: forestst0
Outcome: foliar lignin:N ratiose0
Comparator: soil C:N ratiose0

Not reportedDirection

Verbatim

e0
“foliar lignin:N ratios were correlated with soil C:N ratios”
✓ located verbatim in the source · abstract, characters 1921–1980

t0
“forests”
✓ located verbatim in the source · title, characters 59–66

Title

Carbon and nitrogen dynamics of northeastern United States forests in response to environmental stress: Measurements and models at local to regional scales

Scott V. Ollinger University of New Hampshire Scholars Repository (University of New Hampshire at Manchester) 2000

Other claims from this paper (9)

Observation Ambient ozone was predicted to lower annual forest production by 3% to 16%.
Association Ozone damage declined during drought.
Association CO2 and N deposition stimulated forest carbon uptake to differing degrees by land history.
Association Increased ozone offset much predicted growth enhancement.
Association Foliar chemistry related to soil mineralization and nitrification, with trends differing by disturbance history.
Association Disturbed stands had lower mineralization than undisturbed stands.
Association Disturbed stands had lower nitrification than undisturbed stands.
Association Disturbed stands had higher soil C:N ratios than undisturbed stands.
Observation Stand-level foliar chemistry did not clearly reflect the soil trends.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Mixtures increased plant and soil C:N, C:P and N:P ratios where background soil ratios were low.

Taxon: plantsViridiplantaee0
Treatment: species mixturee0
Outcome: C:N, C:P, N:P ratios of plants and soilse0
Direction: increasede0
Qualifier: when background soil C:N, C:P, and N:P were lowe0

Verbatim

e0
“species mixture increased the C:N, C:P, N:P ratios of plants and soils when background soil C:N, C:P, and N:P were low”
✓ located verbatim in the source · abstract, characters 813–931

Title

Plant mixture balances terrestrial ecosystem C:N:P stoichiometry

Xinli Chen; Han Y. H. Chen Nature Communications 2021. doi:10.1038/s41467-021-24889-w

Other claims from this paper (4)

Observationobservedoriginal resultmeasured

Claim · model-written summary

C/N and L/N ratios were generally low.

Taxon: woody speciest0
Outcome: C/N and L/N ratiose0
Direction: globally lowe0

Verbatim

e0
“C/N and L/N ratios are globally low”
✓ located verbatim in the source · abstract, characters 592–627

t0
“woody species”
✓ located after whitespace/quote normalisation · title, characters 32–45

Title

Chemical Characteristics of Six Woody Species for Alley Cropping

Mosango, M. DOAJ (DOAJ: Directory of Open Access Journals) 1999

Other claims from this paper (3)

Observation The assessed woody species were rich in nitrogen and carbon.
Observation Fiber contents were generally low but varied among species.
Observation Leucaena leucocephala and Senna spectabilis had the lowest C/N and LIN ratios.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Warming increased senesced leaf C/N and C/P ratios.

Taxon: shrube1
Treatment: Warminge0
Outcome: senesced leaf C/N and C/P ratiose0
Direction: increasede0

Not reportedComparator

Verbatim

e0
“Warming increased mature leaf C/N ratios and decreased N/P and C/P ratios and increased senesced leaf C/N and C/P ratios”
✓ located verbatim in the source · abstract, characters 1070–1190

e1
“five coexisting shrub species in a semiarid shrubland”
✓ located verbatim in the source · abstract, characters 697–750

Title

Simulated climate change decreases nutrient resorption from senescing leaves

Iván Prieto; José I. Querejeta Global Change Biology 2019. doi:10.1111/gcb.14914

Other claims from this paper (14)

Intervention effect Climate treatments reduced nutrient contents in mature and senesced leaves.
Intervention effect Warming reduced mature leaf N, K, Ca, S, Fe and Zn.
Intervention effect Warming reduced senesced leaf N, Ca, Mg, S, Fe and Zn.
Intervention effect Warming increased mature leaf C/N ratio.
Intervention effect Warming decreased mature leaf N/P and C/P ratios.
Intervention effect Warming treatments reduced nitrogen resorption by 6.3%.
Intervention effect Warming treatments reduced potassium resorption by 19.8%.
Intervention effect Warming treatments reduced sulfur resorption by 70.9%.
Intervention effect Warming treatments increased calcium accumulation by 440%.
Intervention effect Warming treatments increased iron accumulation by 35.7%.
Intervention effect Rainfall reduction decreased nitrogen resorption by 6.7%.
Intervention effect Rainfall reduction decreased sulfur resorption by 51%.
Intervention effect Rainfall reduction decreased zinc resorption by 46%.
Observation Resorption reductions were consistent across species.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Leaf C:N, C:P and N:P ratios showed the opposite seasonal trend to element concentrations.

Taxon: Atriplex canescensAtriplex canescenst0
Outcome: leaf C∶N,C∶P and N∶P ratiose0

Verbatim

e0
“leaf C∶N,C∶P and N∶P ratios showed contrary trends”
✓ located verbatim in the source · abstract, characters 596–646

t0
“Atriplex canescens”
✓ located verbatim in the source · title, characters 61–79

Title

Responses of C:N:P Ecological Stoichiometry in the Leaves of Atriplex canescens to N Addition

Weimin Chen Xibei zhiwu xuebao 2013

Other claims from this paper (14)

Observation Leaf C, N and P concentrations were higher in August and September and lower in June and November.
Intervention effect N addition increased N concentration and N:P ratio in green leaves.
Intervention effect N addition decreased C:N ratio, N resorption proficiency, and P resorption proficiency.
Intervention effect N addition had no clear effects on green-leaf C and P concentrations or C:P ratio.
Intervention effect N addition had no clear effects on leaf N and P resorption efficiency.
Association N resorption efficiency and proficiency were positively correlated with senescing-leaf C:N ratio.
Association P resorption efficiency correlated positively with P concentration in green leaves.
Association P resorption efficiency correlated negatively with P concentration in senescing leaves.
Association P resorption proficiency correlated positively with P concentration in green leaves.
Association P resorption proficiency correlated positively with senescing-leaf C:N:P.
Association P resorption proficiency correlated negatively with C concentration in senescing leaves.
Mechanism The authors infer that N addition accelerates N uptake in green leaves.
Mechanism The authors infer that N addition reduces N and P resorption from senescing leaves.
Mechanism The authors infer improved decomposition quality of senescing leaves after N addition.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Commercial composts had high C/N ratios of 34-68.

Outcome: C/N ratiose0
Direction: highe0
Value: 34-68e0

Not reportedTaxon

Verbatim

e0
“Both of the commercial composts showed high C/N ratios (34-68)”
✓ located verbatim in the source · abstract, characters 1232–1294

Title

Amelioration of Composting Process by Fertilizers

Wan Rasidah Kadir; Rozita Ahmad; Hoi Why Kong; et al. Compost Science & Utilization 2004. doi:10.1080/1065657x.2004.10702161

Other claims from this paper (12)

Observation Nitrogen- and phosphorus-treated oil palm trunk and empty fruit bunch composts had good stability and higher quality than other composts.
Observation The selected oil palm composts had the lowest C/N ratios, at 14-18.
Observation Their pH values were comparatively low, at 4.6-6.4.
Observation Their total N was 0.95-1.84%.
Observation Nitrate exceeded ammonium nitrogen in those composts.
Observation Their specific respiration rates were very low, at 0.25-0.63.
Observation The plant growth test supported the microbiological-test conclusions.
Method / resource The applied nitrogen mineralization index could not serve as a stability index for every compost type.
Observation Commercial composts had very low total and mineral nitrogen compared with oil palm residue composts.
Recommendation The authors considered commercial composts low in nutritional value and unsuitable for planting media.
Recommendation The authors considered the selected oil palm composts suitable for planting media.
Recommendation The authors proposed bunch ash addition to further improve compost quality.

Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

B. pilosa C:N, C:P, C:K, N:P and N:K ratios increased significantly with maize.

Taxon: maizeZea mayse0
Treatment: grown with maizee0
Interactor: B. pilosaBidens pilosae0weed
Outcome: C : N, C : P, C : K, N : P, and N : K ratiose0
Direction: increasese0

Not reportedComparator

Verbatim

e0
“B. pilosa and I. grandifolia were very sensitive to competition and showed significant increases in C : N, C : P, C : K, N : P, and N : K ratios when grown with maize.”
✓ located verbatim in the source · abstract, characters 972–1139

Title

Interspecific competition changes nutrient : nutrient ratios of weeds and maize

Christiano da Conceição de Matos; Rafael da Silva Teixeira; Ivo Ribeiro da Silva; et al. Journal of Plant Nutrition and Soil Science 2019. doi:10.1002/jpln.201800171

Other claims from this paper (6)

Intervention effect Competition had little effect on maize growth and nutrient content.
Intervention effect Competition reduced weed growth and nutrient uptake.
Observation Maize elemental ratios changed little.
Intervention effect I. grandifolia C:N, C:P, C:K, N:P and N:K ratios increased significantly with maize.
Observation A. viridis nutrient ratios showed low flexibility under maize competition.
Intervention effect Interspecific competition increased the C:P ratio of A. viridis shoots only.

Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

I. grandifolia C:N, C:P, C:K, N:P and N:K ratios increased significantly with maize.

Taxon: maizeZea mayse0
Treatment: grown with maizee0
Interactor: I. grandifoliaIpomoea grandifoliae0weed
Outcome: C : N, C : P, C : K, N : P, and N : K ratiose0
Direction: increasese0

Not reportedComparator

Verbatim

e0
“B. pilosa and I. grandifolia were very sensitive to competition and showed significant increases in C : N, C : P, C : K, N : P, and N : K ratios when grown with maize.”
✓ located verbatim in the source · abstract, characters 972–1139

Title

Interspecific competition changes nutrient : nutrient ratios of weeds and maize

Christiano da Conceição de Matos; Rafael da Silva Teixeira; Ivo Ribeiro da Silva; et al. Journal of Plant Nutrition and Soil Science 2019. doi:10.1002/jpln.201800171

Other claims from this paper (6)

Intervention effect Competition had little effect on maize growth and nutrient content.
Intervention effect Competition reduced weed growth and nutrient uptake.
Observation Maize elemental ratios changed little.
Intervention effect B. pilosa C:N, C:P, C:K, N:P and N:K ratios increased significantly with maize.
Observation A. viridis nutrient ratios showed low flexibility under maize competition.
Intervention effect Interspecific competition increased the C:P ratio of A. viridis shoots only.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Foliar C:N ratios increased.

Taxon: NGP grasslandse1
Outcome: C:N ratiose0
Direction: increasese0

Verbatim

e0
“Parallel declines in foliar δ 15 N and increases in C:N ratios”
✓ located verbatim in the source · abstract, characters 1219–1281

e1
“NGP grasslands”
✓ located verbatim in the source · abstract, characters 1609–1623

Title

The greening of the Northern Great Plains and its biogeochemical precursors

E. N. Jack Brookshire; Paul C. Stoy; Bryce Currey; et al. Global Change Biology 2020. doi:10.1111/gcb.15115

Other claims from this paper (9)

“C/N ratios”

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