天津中新生态城水岸带植物群落多样性与土壤因子的关系研究

Relationships between species diversity of plant communities and soil factors in Tianjin Sino-Singapore eco-city riparian zones

以天津中新生态城水岸带植物群落作为研究对象,运用植物生态学方法分析了近水岸、坡岸、岸上人工和自然植被带群落的的物种丰富度指数、物种多样性指数、生态优势度指数和均匀度指数以及土壤理化性质,然后对各种指数与土壤因子的关系进行了相关分析,以期为天津中新生态城水岸带人工植被群落建立的植被配置和快速绿化材料选取提供科学依据。结果表明:坡岸和岸上人工植被带的植物群落的物种丰富度指数、多样性指数都较高;3个人工植被带植物群落的优势度指数和均匀度指数无明显差别;自然植被带的物种丰富度指数较人工植被带的相差较大。土壤pH值和全P含量与中新生态城水岸带植物群落多样性具有显著相关关系,是对植物群落多样性具有较大影响的土壤因子;而土壤有机质和全N含量与植物群落多样性并无显著关系。

To provide a scientific basis for the vegetation community configuration and fast-grown materials ehosen for artificial vegetation zones of the bank belt in new eco-city of Tianjin, the soil properties are studied and the plants in different areas are also surveyed. The species richness index, species diversity index, ecological dominance index and evenness index are chosen to study the characters of different vegetation types and the relationship between various indices and soil factors are analyzed. The results show that, the species richness indexes and the diversity indexes of the plant communities of artificial vegetation zones at bank and at shore are higher than those of plant communities in other area; the dominance indexes and evenness indexes of the plant communities from 3 artificial vegetation zones show no significant difference respectively; there is a significant difference between species richness index of natural vegetation zone and that of artificial vegetation zone; the pH value and the content of total phosphorus of soil are significantly related to the community diversity of vegetation in waterfront of the new eeo-city, respectively, which means the pH value and the content of total phosphorus are two factors having a great influence on the plant community diversity; soil organic matter and total N content are not correlative to the plant community diversity, respectively.