Zharikova E.
Вестник Бурятской государственной сельскохозяйственной академии им. В.Р. Филиппова 2019; (1): 91-97
The ripe floodplain larch forests are one of the most productive on Sakhalin. They are confined to modern river valleys and are formed on different alluvial soils of fluvial sediments. Alluvial humic typical soils occupy relatively elevated elements of the floodplain (coastal shafts) and experience only a short-term annual flooding. Alluvial humicglay soils are formed in parts of the floodplains which are most often exposed to flooding. Alluvial layered typical and alluvial layered gley soils occupy a narrow part along meandering beds and separate massifs between bifurcating beds sometimes. All soils have low forestcultural characteristics, the soil reaction is strongly acid, the sum of exchangeable bases, values of base saturation and the content of available phosphorus are low. The content of mobile potassium in humus layers is increased and high. All soils have a light particle size, the fraction of fine sand prevails. The soils are loose, high porosity values provide intensive movement and discharge of excess moisture. The hydrophysical parameters are excellent and create an optimal water regime for vegetation. Сoncentrations of TEs in these soils is low. Accumulative series of total contents of TEs in studied alluvial soils Zn>As >Pb>Cu >Ba>Hg = Cd differ from the global pattern of TEs Ba>Zn>Cu>Pb>As>Cd>Hg and Northern Sakhalin most soils Ba>Zn>Pb>As>Cu>Cd>Hg. Environmental importance of soils is to preserve biodiversity, maintain the bio-productivity and ensuring the stable functioning of terrestrial ecosystems.
