Improved net carbon budgets in the US Midwest through direct measured impacts of enhanced weathering
Rattachement africain : us, au, gb. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Terrestrial enhanced weathering (EW) through the application of Mg‐ or Ca‐rich rock dust to soil is a negative emission technology with the potential to address impacts of climate change. The effectiveness of EW was tested over 4 years by spreading ground basalt (50 t ha −1 year −1 ) on maize/soybean and miscanthus cropping systems in the Midwest US. The major elements of the carbon budget were quantified through measurements of eddy covariance, soil carbon flux, and biomass. The movement of Mg and Ca to deep soil, released by weathering, balanced by a corresponding alkalinity flux, was used to measure the drawdown of CO 2 , where the release of cations from basalt was measured as the ratio of rare earth elements to base cations in the applied rock dust and in the surface soil. Basalt application stimulated peak biomass and net primary production in both cropping systems and caused a small but significant stimulation of soil respiration. Net ecosystem carbon balance (NECB) was strongly negative for maize/soybean (−199 to −453 g C m −2 year −1 ) indicating this system was losing carbon to the atmosphere. Average EW (102 g C m −2 year −1 ) offset carbon loss in the maize/soybean by 23%–42%. NECB of miscanthus was positive (63–129 g C m −2 year −1 ), indicating carbon gain in the system, and EW greatly increased inorganic carbon storage by an additional 234 g C m −2 year −1 . Our analysis indicates a co‐deployment of a perennial biofuel crop (miscanthus) with EW leads to major wins—increased harvested yields of 29%–42% with additional carbon dioxide removal (CDR) of 8.6 t CO 2 ha −1 year −1 . EW applied to maize/soybean drives a CDR of 3.7 t CO 2 ha −1 year −1 , which partially offsets well‐established carbon losses from soil from this crop rotation. EW applied in the US Midwest creates measurable improvements to the carbon budgets perennial bioenergy crops and conventional row crops.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Improved net carbon budgets in the <scp>US</scp> Midwest through direct measured impacts of enhanced weathering
- Date Crossref
- 17/08/2023
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Illinois Urbana-Champaign pays non établi dans la noticeUniversité ou école supérieure
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Energy Biosciences Institute pays non établi dans la noticeStructure de recherche
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Carl R. Woese Institute for Genomic Biology Institute for Sustainability pays non établi dans la noticeStructure de recherche
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The University of Western Australia pays non établi dans la noticeUniversité ou école supérieure
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University of Wisconsin–Madison Department of Agronomy pays non établi dans la noticeUniversité ou école supérieure
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Agricultural Research Service pays non établi dans la noticeOrganisme public
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Urbana University pays non établi dans la noticeUniversité ou école supérieure
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University of Sheffield Department of Animal and Plant Sciences pays non établi dans la noticeUniversité ou école supérieure
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University of Illinois at Urbana-Champaign Carl R. Woese Institute for Genomic Biology pays non établi dans la noticeUniversité ou école supérieure
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and Environment University of Illinois at Urbana‐Champaign Urbana Illinois USA Institute for Sustainability pays non établi dans la noticeUniversité ou école supérieure
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Eion Corp. Princeton New Jersey USA pays non établi dans la noticeInstitution
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School of Agriculture and Environment pays non établi dans la noticeUniversité ou école supérieure
University of Illinois Urbana-Champaign, Energy Biosciences Institute et Institute for Sustainability — Carl R. Woese Institute for Genomic Biology, avec 9 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.