Nature of Inner Asia
Bibliographic description:
, STUDY OF 13C/12C CARBON ISOTOPIC COMPOSITION IN SALINE SOILS OF THE SELENGA MID-MOUNTAIN REGION // Nature of Inner Asia. - 2024. №2(28). . - С. 6-12.
Title:
STUDY OF 13C/12C CARBON ISOTOPIC COMPOSITION IN SALINE SOILS OF THE SELENGA MID-MOUNTAIN REGION
Financing:
The study was carried out within the framework of the state assignment No. 121030100229-1.
Codes:
Annotation:
Using isotope mass spectrometry methods, we have studied the effect of glucose on microbial degradation of organic matter in saline soils of the Selenga mid-mountain region. Differences in the isotopic composition of glucose (δ13C -10,57‰) and organic matter (δ13C -26,55‰) allowed us to calculate the fluxes of carbon dioxide (CO ) formed during their microbial degradation in soil. The highest amount of CO2 released was observed in the first 4 hours after application of glucose to the soil, which was 12 times higher than the rate of organic matter degradation before glucose application. The isotopic composition of CO2 with a value of -11.08‰ was observed at 8-hour incubation. In the experiment δ13C CO2
inherits δ13C of organic products used by microorganisms as substrates. The difference in the isotopic composition of exogenous glucose and organic matter contributed δ13C can be used as an isotopic marker to determine the origin of CO of plant residues produced during mineralization.
inherits δ13C of organic products used by microorganisms as substrates. The difference in the isotopic composition of exogenous glucose and organic matter contributed δ13C can be used as an isotopic marker to determine the origin of CO of plant residues produced during mineralization.
Keywords:
organic matter, carbonates, microbial destruction, stable carbon isotopes (δ13C), CO .
List of references:
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