Coupling Relationship between Species Diversity of Planted Chinese Pine (Pinus tabulaeformis Carr.) Communities and Environment Factors in Mountain Area of Shangluo
Abstract:16 samples of the planted Chinese Pine communities in mountain area of Shangluo,Shaanxi Province were set to invest the trees shrubs and herb and test soil characteristics near the Samples.The α diversity index was used to estimate biodiversity of research areas,and to study the relationship between 12 environmental factors and 3 diversity indices.Results indicated that:(1)The community samples record 48 families 84 genera and 95 species of plants.The kinds of shrubs and herb under Chinese Pine communities are richness.The wide distribution species contain Magnoliaceae,Compositae,Rosaceae,Liliaceae and Cyperaceae.The Calculation results of Shannon-Wiener index are almost same as the change trend of Margalef index and Pielou index.(2)Margalef index was significantly correlative to age (P=0.023 7) and 20~40 cm soil available nitrogen (P=0.003 3),Pielou index was significantly correlative to 0~20 cm soil pH (P=0.014 4),Shannon-Wiener index was significantly correlative to standard slope and 40~60 cm soil pH (P=0.049 6,P=0.029 0).It can be concluded that the species diversity was mainly influenced by age,available nitrogen,aspect,and pH.