Humic acids isolated from postpyrogenic soils of forest-steppe region: elemental and molecular composition by 13C-NMR spectroscopy

Abstract

Organic matter plays an important role in global carbon cycle of planet. Forest fires are one of the most significant types of disturbances on a global scale, affecting biogeochemical cycles and global warming. Pyrogenic components of soil organic matter are practically not taken into account when assessing the implications of global climate changes on SOM sequestration rate and its stability. Therefore, there are global changes in humosphere under unpredictable fires effect, and fingerprints of this key factor on the molecular structure of SOM is underestimated.