Compositional features and their relationships between soil seed bank and vegetation of Deyeuxia angustifolia community in Sanjiang Plain

Three different layers of soil in Deyeuxia angutifolia community, namely 0-5 cm, 5-10 cm and larger than 10 cm in Sanjiang Plain were selected to study the compositional features of soil seed bank and their relationships with vegetation with the continuous germination experiment and Srensen index. Results showed that the potential germination species in three different Deyeuxia angutifolia community were 38 (which belong to 21 families, 34 genera), 28 (17 families, 24 genera) and 37 (19 families, 34 genera) respectively. There were significant differences existed in their compositional features between the soil seed bank and vegetation, and the range of their similarity indexes were less than 50 %. These differences may be contributed to the different water condition of Deyeuxia angutifolia communities in Sanjiang Plain. But it need further research to confirm our finding. Nevertheless, this study can serves as the theoretical basis for the biodiversity protection and the degraded wetland ecosystem restoration in Sanjiang Plain.