Detectability of degradable organic matter in agricultural soils by thermogravimetry

Result code in 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>

Alternative codes found

RIV/00216305:26310/19:PU133539

Result on the web

<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>

Result language

angličtina

Original language name

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40104 - Soil science

Project

<a href="/en/project/LO1211" target="_blank" >LO1211: Materials Research Centre at FCH BUT- Sustainability and Development</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Journal of Plant Nutrition and Soil Science

ISSN

1436-8730

e-ISSN

—

Volume of the periodical

182

Issue of the periodical within the volume

5

Country of publishing house

DE - GERMANY

Number of pages

12

Pages from-to

729-740

UT code for WoS article

000488334900006

EID of the result in the Scopus database

2-s2.0-85067466893