宁夏地区几种灌木、半灌木群落物种多样性研究

Species Diversity of Several Shrubs and Semi-shrub Communities in Ningxia

通过野外实地调查,对宁夏地区几种灌木、半灌木群落物种多样性研究。结果表明:调查区植物种共77种,隶属18科51属,区系组成相对简单,多为抗旱或抗盐类植物。油蒿种群重要值最大,在9个样地中,分布于7个样地,重要值居于前两位,是我国干旱区优良固沙半灌木。调查区群落物种多样性水平普遍偏低,优势度指数变化趋势与物种多样性指数呈反比。

Based on the field investigation, species diversity of several shrubs and semi-shrub communities have been studied in Ningxia. The results show that there are 77 species of plants in the survey area, belonging to 18 families and 51 genera. The floristic composition is relatively simple, the majority are drought-resistant or salt-tolerant plants. Artemisia ordosica population has the largest important value, which is an excellent sand-fixing semi-shrub in arid areas of China. In nine sample plots, Artemisia ordosica population has distributed in seven plots of them, with the important values occupying the front two positions. The species diversity level of the community in the survey area is generally low, and the trend of dominance index is inversely proportional to the species diversity index.