Search results for "Soil carbonate"

showing 3 items of 3 documents

Relief and calcium from gypsum as key factors for net inorganic carbon accumulation in soils of a semiarid Mediterranean environment

2021

Abstract In semiarid environments, the total inorganic carbon (TIC) in soil may contribute to the total carbon (C) pool more than the total organic C pool (TOC), thus playing a key role in storing atmospheric CO2. However, due to the different origin pathways of soil carbonates, not all of the TIC pool can be accounted for CO2 sequestration. Indeed, the inorganic C can be accounted for a net sink of CO2 only when calcium (Ca2+) forming carbonates originate from non-carbonate minerals (atmogenic inorganic C, AIC). The aim of this study carried out in a gypsiferous area is to investigate the dissolution of Ca2+ that comes from gypsum (CaSO4·2H2O) in the formation of soil atmogenic carbonates …

Atmogenic inorganic CGypsumSoil testSoil Sciencechemistry.chemical_element010501 environmental sciencesCarbon sequestrationengineering.material01 natural scienceschemistry.chemical_compoundEucalyptus camaldulensiTotal inorganic carbon0105 earth and related environmental sciencesToposequenceSoil carbonate04 agricultural and veterinary sciencesStrontium isotope ratiochemistryEnvironmental chemistrySoil water040103 agronomy & agricultureengineering0401 agriculture forestry and fisheriesCarbonateEnvironmental scienceSink (computing)CarbonGypsiferous soilGeoderma
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Differenziazione e quantificazione dei carbonati litogenici e pedogenici di Gypsisuoli forestali attraverso l'analisi isotopica

2004

Gli autori riferiscono sui tipi e sui modelli di genesi dei carbonati dei suoli, attraverso l’uso degli isotopi del 13C. Lo studio è stato condotto in un’area dell’interno collinare argilloso siciliano, su suoli che evolvono sui depositi evaporitici della Serie Gessoso-Solfifera. Sono stati scelti cinque pedon su litotipi calcarei e non. I pedon sono stati descritti in campo e campionati secondo la sequenza degli orizzonti genetici; sui campioni di suolo sono state eseguite le seguenti analisi: tessitura, reazione, conducibilità elettrica, gesso, carbonio organico ed inorganico. Inoltre, parallelamente sono state eseguite le analisi isotopiche del carbonio organico ed inorganico. I risultat…

Authors report on forms and soil carbonate formation models as detected by 13C isotopes. This study was carried out in a clayey hilly area of central Sicily where soils have developed on evaporitic deposits of “Gessoso-Solfifera” Formation. Four pedons were selected both on calcareous and no calcareous lithotypes. Pedons were described in field and sampled according to sequence of genetic horizons. Soil samples were analyzed to investigate the following properties: particle size distribution reaction electrical conductivity gypsum organic and inorganic carbon. Moreover isotopic analyses were performed on organic and inorganic carbon. Results allow us to describe the complex relationships between biotic and abiotic soil components. In addition models of calcic horizon formation and their implication in soil classification were defined.Settore AGR/13 - Chimica Agraria
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Pedogenic carbonates and carbon pools in gypsiferous soils of a semiarid Mediterranean environment in south Italy

2013

Abstract Soil carbonates are key features in soils of arid and semiarid environment, playing an important role from pedogenetic, landscape history, paleoclimatic and environmental points of view. The objectives of this work were (i) to study pathways of pedogenic carbonate (PC) formation, (ii) to distinguish between lithogenic and pedogenic inorganic C by using the natural C isotope abundance, and (iii) to estimate the soil C pools in a gypsiferous semiarid Mediterranean environment (Sicily, Italy). Five soil pedons developed on calcareous and non-calcareous parent materials from Holocene (10,000 years BP) to Upper Tortonian (7.2–5.3 Ma BP) in age were surveyed. During field soil descriptio…

Mediterranean climateGypsumSettore AGR/13 - Chimica AgrariaSoil ScienceSoil scienceengineering.materialGypsiferous soils Soil carbonates Stable C isotopes Soil C pools Soil–landscape relationshipSettore GEO/08 - Geochimica E Vulcanologiachemistry.chemical_compoundPedogenesischemistrySettore AGR/14 - PedologiaEnvironmental chemistrySoil waterengineeringCarbonateCalcareousGeologyHoloceneColluvium
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