Abstract
Studies of the living organic matter humification process are essential for understanding the carbon biogeochemical cycle. The aim of this study is to analyze relations between the properties of peat, peat humic acids and peat humification degree. The analysis has been done on samples of humic substances extracted from peat profiles in two ombrotrophic bogs and relations between peat age, decomposition and humification degree, botanical composition and properties of peat humic acids (elemental, functional composition) were studied. The found variability of peat properties is less significant than differences in the properties of peat-forming living matter, thus revealing the dominant impact of humification process on the properties of peat. Correspondingly, composition of peat humic acids is little affected by differences in the composition of precursor living organic material.
Highlights
IntroductionIn the carbon biogeochemical cycle, the transformation of living organic matter into refractory part of organic matter (humic substances, such as humic acids, fulvic acids, and humin) or humification is of key importance
In the carbon biogeochemical cycle, the transformation of living organic matter into refractory part of organic matter or humification is of key importance
The analysis has been done on samples of humic substances extracted from peat profiles in two ombrotrophic bogs and relations between peat age, decomposition and humification degree, botanical composition and properties of peat humic acids were studied
Summary
In the carbon biogeochemical cycle, the transformation of living organic matter into refractory part of organic matter (humic substances, such as humic acids, fulvic acids, and humin) or humification is of key importance. It can be supposed that humification conditions may have an impact on the structure and properties of refractory intermediate transformation products of living organic matter—humic substances. From this perspective, it is important to study humification processes in a relatively homogeneous and stable environment, for example, bogs to reduce the impact of natural environmental variability
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