Biochemical and mineral composition of dominant plants of a floodplain mixed grassland plant community in relation to nitrogen availability.

摘要

Biochemical and mineral composition of Elymus chinensis [Leymus chinensis], Bromopsis inermis [Bromus inermis], Lathyrus quinquenervius, Vicia amoena, Carex maritima, Aster tataricus, Potentilla anserina, Sanguisorba officinalis, Galium verum, Equisetum arvense, Thalictrum simplex and Allium odorum [A. ramosum] from 4 botanical groups of floodplain mixed grassland plant communities of Northern Mongolia was studied in 1987-89. Biochemical composition was mainly dependent on meteorological conditionsduring the growth period, on the plant species and the applied rates of N fertilizer. Mineral composition depended on the plant species, soil fertility and mineral fertilizers. An increase in N rate transformed the botanical composition of the initial community and decreased the species richness in the grassland.