The content of chemical elements in herbages of the meadows of the valley of the river Bolshoy Yugan

The data on quantitative content of major minerals in dry vegetative samples of meadow herbages near estuary parts of the valley of the river Bolshoy Yugan (in the vicinity of Yugan village of the Surgut district of Khanty-Mansi Autono- mous Area - Yugra) were obtained by the method of ICP- weights-spectrometer analysis. The content of Ca, K, Mg, P, Mn, Fe, Na, Al, Si, Ti, Rb in six phytocenoses was studied, three of which (sedge, water-sedge and sedge-horsetail) were developed in floodplain troughs, two (miscellaneous-sedge and meadow-canary grass) - on the mane of the floodplain and one (forbs and grasses) - in the beyond-estuary parts of river conditions. The sampling of herbage was made upon termination of long flooding of bottom land in 2015. Essential distinctions of element structure of herbages depending on conditions of a site of meadow communities were established. Most clearly this dependence was traced in increased con- centration of the content of most of the substances found in the herbage of long-poured sedge-horsetail phytocenosis...