A multi-technique approach to assess the fate of biochar in soil and to quantify its effect on soil organic matter composition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895722" target="_blank" >RIV/60076658:12310/17:43895722 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0146638017300396?via%3Dihub" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0146638017300396?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.orggeochem.2017.06.012" target="_blank" >10.1016/j.orggeochem.2017.06.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A multi-technique approach to assess the fate of biochar in soil and to quantify its effect on soil organic matter composition

Popis výsledku v původním jazyce

Differentiation of biochar and native soil organic matter (SOM) is required to assess the effect of biochar amendment on in-situ changes of SOM. Therefore, we used C-4 biochar produced at high temperature (1200 degrees C) by gasification (BCGS) and measured the C-13 abundance of density and particle size fractions. We quantified the BCGS effects on distinct native C-3-SOM pools of a grassland topsoil one year after BCGS amendment. The chemical composition was analyzed with solid-state C-13 CPMAS NMR, whereas information on the nanostructure of BCGS were obtained by Raman microspectroscopy measurements. Our aim was to assess BCGS induced chemical changes of SOM and physical fractions and to validate the accuracy of BCGS detection by C-13 NMR spectroscopy. Quantification by isotopic measurements and C-13 NMR spectroscopy for aromatic C yielded similar estimates of BC in soils. Of the total BCGS, 52% were recovered as free particulate organic matter (POM) and 33% were located in aggregated soil structures isolated as occluded POM particles. Around 4% of the total BCGS was detected in the clay fraction. After one year of field exposure, the surface of the BCGS particles decreased in unordered graphitic-like structures. The higher ordered BC residue is supposed to be more recalcitrant. The native SOC stock increase (p = 0.06, n = 4) in the clay fraction indicated increased sequestration of organic matter as mineral-bound SOM due to BCGS amendment. With respect to soil functionality, the BCGS amendment induced a tremendous shift from a soil system dominated by organo-mineral associations to POM-dominated OC storage, resulting in increased soil air capacity.

Název v anglickém jazyce

A multi-technique approach to assess the fate of biochar in soil and to quantify its effect on soil organic matter composition

Popis výsledku anglicky

Differentiation of biochar and native soil organic matter (SOM) is required to assess the effect of biochar amendment on in-situ changes of SOM. Therefore, we used C-4 biochar produced at high temperature (1200 degrees C) by gasification (BCGS) and measured the C-13 abundance of density and particle size fractions. We quantified the BCGS effects on distinct native C-3-SOM pools of a grassland topsoil one year after BCGS amendment. The chemical composition was analyzed with solid-state C-13 CPMAS NMR, whereas information on the nanostructure of BCGS were obtained by Raman microspectroscopy measurements. Our aim was to assess BCGS induced chemical changes of SOM and physical fractions and to validate the accuracy of BCGS detection by C-13 NMR spectroscopy. Quantification by isotopic measurements and C-13 NMR spectroscopy for aromatic C yielded similar estimates of BC in soils. Of the total BCGS, 52% were recovered as free particulate organic matter (POM) and 33% were located in aggregated soil structures isolated as occluded POM particles. Around 4% of the total BCGS was detected in the clay fraction. After one year of field exposure, the surface of the BCGS particles decreased in unordered graphitic-like structures. The higher ordered BC residue is supposed to be more recalcitrant. The native SOC stock increase (p = 0.06, n = 4) in the clay fraction indicated increased sequestration of organic matter as mineral-bound SOM due to BCGS amendment. With respect to soil functionality, the BCGS amendment induced a tremendous shift from a soil system dominated by organo-mineral associations to POM-dominated OC storage, resulting in increased soil air capacity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

40104 - Soil science

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Organic Geochemistry

ISSN

0146-6380

e-ISSN

—

Svazek periodika

112

Číslo periodika v rámci svazku

OCT 2017

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

177-186

Kód UT WoS článku

000414812300015

EID výsledku v databázi Scopus

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