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为探讨木麻黄林林下物种多样性与土壤因子的相关性,对海口市海岸带不同林分结构的木麻黄林下物种多样性和土壤理化因子进行了调查和分析,结果表明:木麻黄海防林林下群落物种组成简单,有物种约52种,隶属于29科46属;群落物种丰富度指数(S)、Simpson指数(D)及Shannon-Wiener指数(H’)均较低,物种丰富度随人为干扰增强而减少;林地土壤含水量极低,有机质、速效钾、速效磷等重要土壤养分极为缺乏。土壤因子与物种多样性的简单相关性研究表明,土壤有机质、速效氮、速效钾含量与多样性指数S、H’和D存在显著的相关关系,初步认为这些因子是影响海口市木麻黄海防林林下物种多样性的重要土壤因子。
In order to explore the relationship between species diversity and soil factors in forest of Casuarina equisetifolia, the species diversity and physico-chemical factors of Casuarina equisetifolia forest under different stand structure in the coastal zone of Haikou were investigated and analyzed. The results showed that: Under the forest stands, the community composition is simple, with about 52 species belonging to 46 genera and 29 families. The species richness index (S), Simpson index (D) and Shannon-Wiener index (H ’ The degree of soil moisture decreases with the enhancement of human disturbance. The soil moisture of forest land is extremely low, and the nutrient contents of important soil such as organic matter, available potassium and available phosphorus are extremely scarce. The simple correlation between soil factors and species diversity showed that soil organic matter, available nitrogen, and available potassium had a significant correlation with diversity index S, H ’and D, Under the forest species diversity of important soil factors.