Your browser doesn't support javascript.
loading
Let the dust settle: Impact of enhanced rock weathering on soil biological, physical, and geochemical fertility.
Xavier, Dupla; Claustre, Romane; Bonvin, Emma; Graf, Iris; Le Bayon, Renée-Claire; Grand, Stéphanie.
Afiliación
  • Xavier D; University of Lausanne, Institute of Earth Surface Dynamics, CH-1015 Lausanne, Switzerland. Electronic address: xavier.dupla@unil.ch.
  • Claustre R; University of Lausanne, Institute of Earth Surface Dynamics, CH-1015 Lausanne, Switzerland.
  • Bonvin E; University of Lausanne, Institute of Earth Surface Dynamics, CH-1015 Lausanne, Switzerland.
  • Graf I; University of Lausanne, Institute of Earth Surface Dynamics, CH-1015 Lausanne, Switzerland.
  • Le Bayon RC; University of Neuchâtel, Institute of Biology, Functional Ecology Laboratory, CH-2000, Switzerland.
  • Grand S; University of Lausanne, Institute of Earth Surface Dynamics, CH-1015 Lausanne, Switzerland.
Sci Total Environ ; : 176297, 2024 Sep 14.
Article en En | MEDLINE | ID: mdl-39284451
ABSTRACT
Terrestrial enhanced rock weathering (ERW) is a promising carbon dioxide removal technology that consists in applying ground silicate rock such as basalt on agricultural soils. On top of carbon sequestration, ERW has the potential to raise the soil pH and release nutrients, thereby improving soil fertility. Despite these possible co-benefits, concerns such as heavy metal pollution or soil structure damage have also been raised. To our knowledge, these contrasted potential effects of ERW on soil fertility have not yet been simultaneously investigated. This field trial aimed at assessing the impact of ERW on biological, physical, and chemical soil properties in a temperate agricultural context. To do so, three vineyard fields in Switzerland were selected for their distinct geochemical properties and were amended with basaltic rock powder at a dose of 20 tons per hectare (2 kg.m-2). On each field, basaltic rock powder was either applied one year before the sampling campaign, one month before the sampling campaign, or not applied (control) for a total of 27 plots with 9 repetitions of each level. Overall, basaltic rock powder addition had a predominantly positive to neutral effect on soil fertility. Most soil properties showed no significant change either 1 month or 1 year post application. Nevertheless, our study highlighted a significant increase in earthworm abundance (+71 % on average), soil respiration (+50 %) and extractable sodium concentration (+23 %) as early as 1 month post application. The higher soil respiration raises the question of CO2 losses from organic matter mineralization that could limit ERW's efficiency. The increase in sodium raises concerns about a sodification risk potentially damaging soil fertility. These elements now require further investigation before enhanced rock weathering can be considered a viable and secure carbon dioxide removal technology.
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos