Stability of soil organic carbon under long-term fertilization: Results from 13C NMR analysis and laboratory incubation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F22%3A00557497" target="_blank" >RIV/60077344:_____/22:00557497 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0013935121017771?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013935121017771?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.envres.2021.112476" target="_blank" >10.1016/j.envres.2021.112476</a>
Alternative languages
Result language
angličtina
Original language name
Stability of soil organic carbon under long-term fertilization: Results from 13C NMR analysis and laboratory incubation
Original language description
Long-term fertilization has shown a high relevance as regards soil organic carbon (SOC) sequestration, but the degree of stability of the sequestered SOC has not been widely studied up to now. Using physical fractionation combined with laboratory incubation and NMR spectroscopy, we evaluated the differences in SOC stability caused by long-term fertilization. Four SOC fractions were isolated and examined for contents and chemical composition and cumulative amount of CO2-C respired from the fractions under six fertilization treatments: control (CK), balanced inorganic fertilization (NPK), NPK combined with pig manure (MNPK), NPK combined 1.5 times of pig manure (1.5MNPK), and NPK combined with high amount of manure (M2NPK). The highest contents of SOC were recorded for the coarse particulate organic carbon (cPOC) fraction, ranging from 17.25 to 30.47 g kg-1 under CK and M2NPK. The highest cumulative amount of CO2-C was released from the cPOC fraction under manure treatments (M2NPK and 1.5NPKM), which was 56 and 43% higher than that from CK, whereas the lowest amount of CO2-C was released from the mineral associated-C (MOC) fraction under the same treatments, being 65 and 49% higher than that released from CK, suggesting low SOC stability in cPOC and high SOC stability in MOC fractions. However, manure treatments (M2NPK and 1.5NPKM) greatly lowered the specific amount of C-mineralized (C-mineralized per unit total SOC) in fractions and whole soil, suggesting the ability of manure to accumulate more SOC by reducing SOC losses. Moreover, carbonyl-C was found to be the form of SOC experiencing major degree of sequestration under current fertilization practices. The SOC stability indices, aromaticity index (AI), hydrophobicity index (HI) and alkyl-C/O-alkyl-C were found to be higher in manure treated plots further suggesting higher stability of SOC under manure addition. Thus, long-term manure combined with mineral fertilizers would enhance SOC stability through minimizing SOC losses and promoting accumulation of stable C forms in a Chinese Mollisol.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
40104 - Soil science
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Research
ISSN
0013-9351
e-ISSN
1096-0953
Volume of the periodical
205
Issue of the periodical within the volume
April
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
112476
UT code for WoS article
000730400200002
EID of the result in the Scopus database
2-s2.0-85120652596