The distribution and relationships of ground vegetation, soil seed bank and soil water content of fixed sand under different micro-landform conditions

The distribution and relationships of the ground vegetation, soil seed bank, soil water content and the effects of micro-landform on types of species, species density, diversity and similarity of soil seed bank and aboveground vegetation were studied by investigating the ground vegetation, soil seed bank and soil water content in different micro-landform units of fixed sand in Yanchi desert steppe. The number of species, density, similarity, the soil seed bank species richness index and the soil water content, ground vegetation, soil seed bank decreased in the following order: Bottom slope＞Lower side slope＞Middle side slope＞Upper side slope＞Crest slope. The soil water content, ground vegetation and soil seed bank are significantly positive interrelationships(P0.05). The soil seed bank species diversity index and uniformity coefficient showed a fluctuated with slope position.