Chimitdorzhieva G.D., Tsybikova E.V. Features of Humus of Chestnut Soils of Southern Catholic of Siberia // Arid ecosystems. 2018. V. 24. № 4 (77). P. 29-35. | PDF
In the process of evolution under conditions of long and deep freezing and drying of the soil profile, with frequent seasonal diurnal temperature fluctuations, chestnut soils with low-condensed and developed aliphatic chains, humic acids (HA) are formed, which give them an unstable character. This is evidenced by the modern ecological state of chestnut soils, the extent of degraded arable and pasture lands in the Republic of Buryatia reach significant areas. Their location in the basins between the mountains, often causes a high exposure to the effects of deflation processes, which lead to dehumification. This negative phenomenon is also exacerbated at the present time by global climate change, calling for increased rates of aridization. The complex of these causes leads to pronounced features of the phytocenosis composition of the region, which is highly lignified, depleted in protein components, which affected the structure of humic substances and determined a number of distinctive features of humus, unlike similar soils of other regions.
Keywords: chestnut soils, humic acids, humus, Siberia.