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Record W3168085491 · doi:10.82308/22206

Response of an alfalfa-timothy mixture grown in open-top chambers under ambient and elevated carbon dioxide

2015· article· en· W3168085491 on OpenAlexaboutno aff
Jonathan Messerli

Bibliographic record

VenueeScholarship@McGill (McGill) · 2015
Typearticle
Languageen
FieldAgricultural and Biological Sciences
TopicPlant responses to elevated CO2
Canadian institutionsnot available
Fundersnot available
KeywordsCarbon dioxideChemistryEnvironmental scienceHorticultureBiology

Abstract

fetched live from OpenAlex

L’augmentation de la concentration en dioxide de carbone (CO2) pourrait affecter la croissance de la luzerne et de la fléole, deux plantes fourragères généralement cultivées en mélange à travers le Canada. Dans cette étude, un système d’ «open-top chambers» a été mis au point afin d’étudier les effets de l’augmentation de la concentration en CO2 sur le rendement, la valeur nutritive, l’accumulation des réserves et la dégradabilité des racines d’un mélange pérenne composé de luzerne et de fléole des prés. Le système, après avoir été en fonction pendant deux saisons de croissance, s’est montré efficace à maintenir une concentration élevée en CO2, tout en maintenant des conditions de croissance semblables à celles en champs. Le rendement du mélange a augmenté en réponse à l’augmentation du CO2, plus particulièrement durant les mois les plus chauds de la saison de croissance. La valeur nutritive du fourrage a été diminuée en raison d’une légère baisse du contenu en azote totale, d’une augmentation significative du contenu en fibres et d’une légère baisse de la digestibilité. L’augmentation du CO2 n’a toutefois pas affecté l’accumulation des réserves à l’automne chez les plantes. Cependant, la dégradabilité des racines de luzerne a été augmentée significativement, indiquant une possible diminution du carbone du sol sous des conditions climatiques futures. Cette étude valide l’utilisation d’ «open-top chambers» comme un moyen efficace et relativement peu coûteux pour l’étude à long terme des effets du CO2 sur les plantes.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.024
Threshold uncertainty score0.048

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.026
GPT teacher head0.233
Teacher spread0.207 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations1
Published2015
Admission routes1
Has abstractyes

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