Многолетняя динамика содержания гуминовых веществ в водах осушенного верхового болота в Западной Сибири

Abstract

Analysis of the many-year dynamics of the humic substances content in forest/melioration site bog waters has been presented. Spectral, correlation and factor analysis have been carried out. The investigations have shown a 2-4 years cyclic recurrence in high drained bog waters humic substances content, as well as statistically significant trend to the humic acids concentration decrease over the many-year period. As for the seasonal dynamics, an appropriate increase of humic acids content in bog waters has been detected in the middle of the vegetation period (July-August). Correlation analysis enabled to state a relationship between the humic acids quantity and the peat reserve redox potential. In some years connections between the humic substances amount in water with the bog water level, peat humidity, peat deposit temperature, air temperature, and atmospheric precipitation were recorded. At that, the temperature regime was a limiting factor determining the humic acids quantity in bog waters, while the peat deposit moisture load determined fulvoacids quantity. It has been shown that as a result of a high bog drainage the increase of vegetative remains and peat organic matter transformation intensity and increase of humic substances in bog waters (14% increase of humic acids and 18% increase of fulvoacids) in comparison with the region background high bogs has occurred. Therefore, economic use of peat bogs, air temperature and atmospheric precipitation increase associated with climate change will facilitate the increase of organic matter both in bog waters and, probably, in groundwaters and river waters of the region.