Detectability of degradable organic matter in agricultural soils by thermogravimetry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F19%3A43915847" target="_blank" >RIV/62156489:43210/19:43915847 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26310/19:PU133539

Výsledek na webu

<a href="https://doi.org/10.1002/jpln.201800516" target="_blank" >https://doi.org/10.1002/jpln.201800516</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/jpln.201800516" target="_blank" >10.1002/jpln.201800516</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Popis výsledku v původním jazyce

Sustainable agricultural land use requires an assessment of degradable soil organic matter (SOM) because of its key function for soil fertility and plant nutrition. Such an assessment for practical land use should consider transformation processes of SOM and its sources of different origin. In this study, we combined a 120-day incubation experiment with thermal decay dynamics of agricultural soils altered by added organic amendments. The aim was to determine the abilities and limits of thermal analysis as a rapid approach revealing differences in the degradability of SOM. The carried out experiments based on two independent sampling sets. The first sample set consisted of soil samples taken from non-fertilized plots of three German long-term agricultural field experiments (LTAEs), then artificially mixed with straw, farmyard manure, sheep faeces, and charcoal equal to 60 Mg haMINUS SIGN 1 under laboratory conditions. The second sample set based on soil samples of different treatments (e.g., crop type, fertilization, cultivation) in LTAEs at Bad Lauchstädt and Müncheberg, Germany. Before and after the incubation experiment, thermal mass losses (TML) at selected temperatures were determined by thermogravimetry indicating the degradability of organic amendments mixed in soils. The results confirmed different microbial degradability of organic amendments and SOM under laboratory conditions. Thermal decay dynamics revealed incubation-induced changes in the artificial soil mixtures primarily at TML around 300oC in the case of applied straw and sheep faeces, whereas farmyard manure showed mainly changes in TML around 450oC. Charcoal did not show significant degradation during incubation, which was confirmed by TML. Detailed analyses of the artificial soil mixtures revealed close correlations between CO2-C evolution during incubation and changes in TML at 300oC with R2 &gt; 0.96. Results of the soils from LTAEs showed similar incubation-induced changes in thermal decay dynamics for fresh plant residues and farmyard manure. We conclude that the practical assessment of SOM could be facilitated by thermal decay dynamics if modified sample preparation and evaluation algorithms are used beyond traditional peak analysis.

Název v anglickém jazyce

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Popis výsledku anglicky

Sustainable agricultural land use requires an assessment of degradable soil organic matter (SOM) because of its key function for soil fertility and plant nutrition. Such an assessment for practical land use should consider transformation processes of SOM and its sources of different origin. In this study, we combined a 120-day incubation experiment with thermal decay dynamics of agricultural soils altered by added organic amendments. The aim was to determine the abilities and limits of thermal analysis as a rapid approach revealing differences in the degradability of SOM. The carried out experiments based on two independent sampling sets. The first sample set consisted of soil samples taken from non-fertilized plots of three German long-term agricultural field experiments (LTAEs), then artificially mixed with straw, farmyard manure, sheep faeces, and charcoal equal to 60 Mg haMINUS SIGN 1 under laboratory conditions. The second sample set based on soil samples of different treatments (e.g., crop type, fertilization, cultivation) in LTAEs at Bad Lauchstädt and Müncheberg, Germany. Before and after the incubation experiment, thermal mass losses (TML) at selected temperatures were determined by thermogravimetry indicating the degradability of organic amendments mixed in soils. The results confirmed different microbial degradability of organic amendments and SOM under laboratory conditions. Thermal decay dynamics revealed incubation-induced changes in the artificial soil mixtures primarily at TML around 300oC in the case of applied straw and sheep faeces, whereas farmyard manure showed mainly changes in TML around 450oC. Charcoal did not show significant degradation during incubation, which was confirmed by TML. Detailed analyses of the artificial soil mixtures revealed close correlations between CO2-C evolution during incubation and changes in TML at 300oC with R2 &gt; 0.96. Results of the soils from LTAEs showed similar incubation-induced changes in thermal decay dynamics for fresh plant residues and farmyard manure. We conclude that the practical assessment of SOM could be facilitated by thermal decay dynamics if modified sample preparation and evaluation algorithms are used beyond traditional peak analysis.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40104 - Soil science

Projekt

<a href="/cs/project/LO1211" target="_blank" >LO1211: Centrum materiálového výzkumu na FCH VUT v Brně - udržitelnost a rozvoj</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Plant Nutrition and Soil Science

ISSN

1436-8730

e-ISSN

—

Svazek periodika

182

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

12

Strana od-do

729-740

Kód UT WoS článku

000488334900006

EID výsledku v databázi Scopus

2-s2.0-85067466893