Home – Home – Jornals – Contemporary Problems of Ecology 2024 number 4

The ¹³C-NMR spectra and elemental composition of lipids of gray forest soils (Greyic Phaeozems), dispersed carbonate chernozems (Haplic Chernozem Hypocalcic) and chestnut soils (Kastanazems) of Western Transbaikalia were determined. The contribution of carbon contained in lipids to the total reserves of organic carbon is calculated. For the first time, the work presents the characteristics of the lipid fraction of organic matter in cold soils of Western Transbaikalia. An analysis of the spectra was carried out, including the assignment of signals from ethoxy groups, phenol derivatives and alkene fragments, as well as an indication of the ranges of chemical shifts characteristic of certain types of carbon nuclei. A comparison was made of the content of various types of structural elements in the studied lipids. The results obtained showed that the main part of lipids consists of esters and fatty acids. Carbon atoms in the molecular structure of lipids are predominantly represented by aliphatic chains. Analysis of the composition of lipids showed that the content of carbon atoms is 65-73 %, and hydrogen - 8-10 %. The high concentration of oxygen atoms in lipids indicates that functional groups containing oxygen are concentrated in the aliphatic part of the lipids. The share of lipid carbon in the total reserve of organic carbon is 6.5 % for chestnut soils, 5.8 % for gray forest soils, 4.1 % for dispersed carbonate chernozems.