Lipids of Cold Soils of Transbaikalia

IF 0.7 4区环境科学与生态学 Q4 ECOLOGY Contemporary Problems of Ecology Pub Date : 2024-07-27 DOI:10.1134/s1995425524700343

E. O. Chimitdorzhieva

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Abstract

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 analyzed. The contribution of carbon in lipids to the total organic carbon was calculated. This is the first characterization of the lipid fraction of organic matter in cold soils of Western Transbaikalia. An analysis of the spectra, 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, were carried out. The content of various types of structural elements in the studied lipids was compared. Based on the obtained results, the main part of lipids consisted of esters and fatty acids. Analysis of the composition of lipids showed that the content of carbon and hydrogen atoms was 65‒73 and 8‒10%, respectively. The high concentration of oxygen atoms in lipids indicated that functional groups containing oxygen were concentrated in the aliphatic part of the lipids. The share of lipid carbon in the total reserve of organic carbon was 6.5% for chestnut soils, 5.8% for gray forest soils, and 4.1% for dispersed carbonate chernozems.

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外贝加尔地区寒冷土壤中的脂质

摘要分析了外贝加尔西部灰色森林土壤（Greyic Phaeozems）、分散碳酸盐土壤（Haplic Chernozem Hypocalcic）和栗树土壤（Kastanazems）中脂质的 13C-NMR 光谱和元素组成。计算了脂质中的碳占总有机碳的比例。这是对西外贝加尔地区寒冷土壤中有机物脂质部分的首次鉴定。对光谱进行了分析，包括乙氧基、苯酚衍生物和烯烃片段信号的分配，以及某些类型碳核特有的化学位移范围的指示。对所研究的脂质中各类结构元素的含量进行了比较。根据所得结果，脂质的主要成分是酯和脂肪酸。对脂质成分的分析表明，碳原子和氢原子的含量分别为 65-73% 和 8-10%。脂质中氧原子的高浓度表明，含氧官能团集中在脂质的脂肪族部分。在有机碳总储量中，栗木土壤的脂碳比例为 6.5%，灰林土壤为 5.8%，分散碳酸盐土壤为 4.1%。

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来源期刊

Contemporary Problems of Ecology 环境科学-生态学

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Contemporary Problems of Ecology is a multidisciplinary periodical that publishes original works on the following subjects: theoretical and methodical issues of ecology, regional aspects of ecology, regional ecological disasters, structure and functioning of ecosystems, anthropogenic transformation of ecosystems. All basic aspects of modern ecology, including the most complicated interactions between living organisms and their environment, are presented. Some of the journal issues are dedicated to global changes in biological diversity at various levels of organization (populations, species, ecosystems) principles and methods of nature conservation.