The total nitrogen content in the leaves of some decorative perennial plants in the urban environment conditions

The research results on the accumulative capacity of the decorative plant leaves in the Scientific Center of SB RAS (Akademgorodok, Novosibirsk) conditions, where the main source of pollution is motor vehicles are presented. The data on the vehicle pollution influence on the total nitrogen content in the leaves are analyzed. The accumulative capacity of 5 species in the urban environment is determined. The species specificity of the nitrogen accumulation in decorative plants is revealed. High nitrogen absorption in daylily and iris in the blossom-fading period is determined, while hosts in the period of regrowth. The received results can be used in the ecological bio-testing of the urban environment.