作 者：
罗琰;苏德荣;纪宝明;吕世海;韩立亮;李兴福
单 位：
中国环境科学研究院;北京林业大学草地资源与生态研究中心
关键词：
辉河湿地;草甸;植被群落;多样性指数;土壤性质;RDA分析
摘 要：
湿地土壤影响植物的种类、数量、生长发育、形态和分布,湿地植物又影响土壤中元素的分布与变化。以辉河国家级自然保护区核心区为研究区域,对湿地草甸、沼泽草甸、过渡草甸、成熟草甸和盐碱草甸进行植被群落调查,并且对不同草甸的土壤进行实验室分析,研究辉河湿地不同草甸优势植物群落特征和土壤元素分布特征及其相互关系。研究结果表明,辉河湿地不同草甸植被群落特征受土壤元素分布特征、水文情势和植物生长特性影响,植被Shannon-Wiener和Simpson指数均为成熟草甸最高,盐碱草甸最低;Pielou均匀度指数变化为:成熟草甸<盐碱草甸<湿地草甸<沼泽草甸<过渡草甸;其中,沼泽草甸地上和地下生物量最高,盐碱草甸最低。不同草甸植被对土壤养分的含量及变化具有一定影响,湿地草甸土壤因子对其植被的生长也具有重要的反馈作用。不同草甸植物群落下同种元素含量差异显著,过渡草甸对土壤碳、氮、磷的吸收和滞留能力最强。此外,植被群落Shannon-Wiener指数与土壤含水量呈显著正相关,与土壤速效磷呈极显著负相关;土壤有机质、全氮和铵态氮与植被高度均呈极显著正相关;植被盖度与土壤有机质和全氮呈显著正相关;土壤速效磷与植被地上、地下生物量均呈显著负相关,而土壤铵态氮与植被地上、地下生物量均呈极显著正相关;全磷对植被多样性、生长和生物量影响较小。植被群落特征与土壤因子的冗余分析(RDA)排序表明,辉河湿地不同草甸之间存在一定程度的演替,成熟草甸和湿地草甸可能为演替的初始阶段或者是末阶段,而过渡草甸为中间阶段,而且土壤养分受群落演替的影响显著。
译 名：
Vegetation community characteristics of different meadows and their relationship with soil factors in Huihe wetland
作 者：
LUO Yan;SU De-rong;JI Bao-ming;L Shi-hai;HAN Li-liang;LI Xing-fu;Grassland Resources and Ecology Research Center,Beijing Forestry University;China Research Academy of Environmental Sciences;
关键词：
Huihe wetland;;meadows;;vegetation community;;diversity index;;soil properties;;RDA analysis
摘 要：
Wetland soils affect the quantity,growth,development,morphology and distribution of plant communities.Selecting the core area of Huihe National Nature Reserve as the study area,the vegetation communities of wetland meadow,swamp meadow,transition meadow,mature meadow and saline-alkali meadow were investigated. Soil samples from the different meadows were also analyzed. The study investigated characteristics of the dominant plant communities,the distribution of soil elements and the relationship between the two. Results showed that the meadows' vegetation characteristics were influenced by soil element distribution,hydrological regimes and plant growth characteristics. Changes in the Shannon-Wiener index and Simpson index showed a similar trend,with maximum values scored by mature meadow and minimum values by saline-alkali meadow. The Pielou index changes were: mature meadow < saline-alkali meadow
