English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Limiting global mean temperature changes to well below2 ∘C likely requires a rapid and large-scale deployment ofnegative emission technologies (NETs). Assessments so far have shown a highpotential of biomass-based terrestrial NETs, but only a few assessments have included effectsof the commonly found nutrient-deficient soils on biomass production. Here,we investigate the deployment of enhanced weathering (EW) to supplynutrients to areas of afforestation–reforestationand naturally growing forests (AR) and bioenergy grasses (BG) that are deficient in phosphorus (P), besides theimpacts on soil hydrology. Using stoichiometric ratios and biomass estimatesfrom two established vegetation models, we calculated the nutrient demand ofAR and BG. Insufficient geogenic P supply limits C storage in biomass. For amean P demand by AR and a low-geogenic-P-supply scenario, AR would sequester119 Gt C in biomass; for a high-geogenic-P-supply and low-AR-P-demandscenario, 187 Gt C would be sequestered in biomass; and for a low geogenic Psupply and high AR P demand, only 92 Gt C would be accumulated by biomass.An average amount of ∼150 Gt basalt powder applied for EWwould be needed to close global P gaps and completely sequester projectedamounts of 190 Gt C during the years 2006–2099 for the mean AR P demandscenario (2–362 Gt basalt powder for the low-AR-P-demand and for the high-AR-P-demand scenarios would be necessary, respectively). The averagepotential of carbon sequestration by EW until 2099 is ∼12 Gt C (∼0.2–∼27 Gt C) for the specifiedscenarios (excluding additional carbon sequestration via alkalinityproduction). For BG, 8 kg basalt m−2 a−1 might, on average,replenish the exported potassium (K) and P by harvest. Using pedotransferfunctions, we show that the impacts of basalt powder application on soilhydraulic conductivity and plant-available water, to close predicted P gaps,would depend on basalt and soil texture, but in general the impacts aremarginal. We show that EW could potentially close the projected P gaps of anAR scenario and nutrients exported by BG harvest, which would decrease orreplace the use of industrial fertilizers. Besides that, EW ameliorates thesoil's capacity to retain nutrients and soil pH and replenish soil nutrientpools. Lastly, EW application could improve plant-available-water capacitydepending on deployed amounts of rock powder – adding a new dimension to thecoupling of land-based biomass NETs with EW.

Impacts of enhanced weathering on biomass production for negative emission technologies and soil hydrology