中文摘要：

由于不同湿地植物在分泌氧气与有机物能力方面存在着较大差异,所以不同植物种类及其群落组成可能不同程度地影响湿地微生物群落参数。为了检验这种假设,本研究在垂直流微宇宙中分别确立了5个植物种类丰富度水平,并用霍格兰德营养液灌溉湿地。结果表明：在4个植物种类间,单一栽培羊蹄或水芹湿地的微生物群落对生态板中酰胺或杂合物的利用能力较大,而虉草或吉祥草湿地的利用能力则较小。其次,较大的植物种类丰富度不仅提高了湿地中微生物生物量碳和氮以及脱氢酶活性,而且也增强了微生物群落对碳水化合物和氨基酸的利用能力。另外,水芹、虉草或吉祥草在植物群落中的存在与否影响了微生物群落对碳水化合物、杂合物和酰胺的利用能力。

英文摘要：

Aquatic plant species greatly differ in the capacities to excrete oxygen and execute organic compounds into the rhizosphere environment. Accordingly,the difference in plant species and community composition may affect microbial community differently. In order to test this hypothesis mentioned above,the current study established five plant species richness levels（ 0,1,2,3 and 4 species /microcosm unit） in vertical flow microcosm wetlands using a completely random block design,and irrigated the microcosms with Hoagland inorganic nutrient solution. The results showed that the microcosms monocultured with Rumex japonicus or Oenanthe hookeri showed a greater capacity of microbial communities to utilize amines /amides or miscellaneous compounds than the microcosms monocultured with Phalaris arundinacea or Reineckia carnea.Plant species richness not only increased microbial biomass carbon and nitrogen as well as dehydrogenase activity in the microcosms,but also enhanced the capacities of microbial communities to utilize carbohydrates and amino acids. Furthermore,the presence or absence of O. hookeri,P. arundinacea or R. carnea within a given plant community affected the capacity of microbial communities to utilize carbohydrate,miscellaneous and amines /amides.