中文摘要：

为了综合评估植物多样性对湿地氨挥发和温室气体排放的影响,笔者调查研究了杭州西溪湿地常见物种香菇草（Hydrocotyle vulgaris）和粉绿狐尾藻（Myriophyllum aquaticum）的单种及混种系统的氨挥发、甲烷（CH4）和氧化亚氮（N2O）排放、氮浓度及植物生物量.研究结果表明：混种系统比单种系统降低了87%的氨挥发通量;混种系统比单种系统降低了67%的N2O通量;混种系统的植物生物量比单种系统增加了84%;物种特性对湿地氨挥发和温室气体排放等生态系统功能无显著影响.这些结果表明在湿地生态系统中,混种系统可以有效减少氨挥发和温室气体排放,并提升湿地的固碳能力.

英文摘要：

In order to evaluate the effects of plant diversity on ammonia volatilization and greenhouse gas emission in wetland,two common monocultures of Hydrocotyle vulgaris and Myriophyllum aquaticum and the mixture of two species in Xixi Wetland National Park were studied,and the ammonia volatilization,emissions of methane and nitrous oxide,nitrogen concentration in water and plant biomass of the communities were investigated. The results showed the hybrid system reduced the flux of ammonia volatilization and N2 O and by 87% and 67% respectively,compared to the monocultural system. Besides,the hybrid system increased plant biomass by 84% compared to the monocultural system. Species identity had no significant effect on ammonia volatilization and greenhouse gas emission. These results suggested that in wetland,hybrid system could effectively reduce ammonia volatilization and greenhouse gas emission,and enhance carbon sequestration in wetland ecosystem.