Purtova L.N., Kiseleva I.V., Burdukovsky M.L.
Bulletin of the North-East scientific center 2019; (2): 46-54
The parameters of the humus status of fallow dark-humus bleached horizons and alluvial gray-humus soils in Primorye have been estimated. In fallow alluvial gray-humus soils, the humate orientation prevailed in the process of humus formation, whereas in dark humus soils, it was changed to humate-fulvate. Characteristic for the studied soil types is a high degree of organic matter humification. When in a fallow soils are marked with a decrease in the proportion of humic acids associated with Ca2+, in comparison with their arable counterparts. The pools of labile and stable carbon are calculated. The main share of carbon (from 67 to 73%) in the investigated soils is contained in a stable pool. An increase in the carbon fraction of the stable pool and the transition of humus to a more stable state, in the investigated soils of the deposits, was indicated by a decrease in the ratio between the carbon of the labile and stable pools.
