The coastal strip of the northwestern Caspian is characterized by hydromorphism and salinization processes which depending on the Caspian piled-up water, groundwater salinity, seawater, and salt composition of the underlying rocks. The migrational salts capability in deltoic ecosystem components in dynamic over the main representatives of pasture plants occurring in the Western Caspian and playing an important role in developing the theoretical foundations of a system of measures to increase the productivity of cover crop have studied. Salts migration from soil layers into plants which taking place in synthesis of material-energy and material resource of environment is one of the chains of bio-substrat links. The research results confirm the data that the ash elements stock in the ephemeral-absinthial group varies from 21.5 to 64.5 kg per 1 ha. The organogens prevail in them – 944 kg / ha, K is dominant, then Ca and Mg. The amount of halogens is 7.05 kg / ha, of which Cl portion includes 3.31 and Na – 2.80 kg / ha. In the ephemeral-absinthial group cenoses rather high values of aboveground phytomass are up to 50 centners / ha and the supply of ash elements (halogens 32.14 and organogens 36.18 mg-eq) is much higher compared to their content in soil (7.05 and 6, 31 mg-eq). In roots difference in quantity of organogens and halogens is insignificant – 2.03 and 2.04 mg-eq. We associate such differences with a greater proportion of absinthial in the aboveground phytomass composition.