模拟氮沉降对三江平原小叶章群落多样性以及CO_2排放通量的影响  

Effect of Community Diversity of Deyeuxia angustifolia and CO_2 Emission Flux Under Nitrogen Deposition Conditions in Sanjiang Plain

作　　者：戴航宇[1] 隋心 付晓宇[3] 张荣涛[3] DAI Hangyu;SUI Xin;FU Xiaoyu;ZHANG Rongtao(College of Resources and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030;College of Life Sciences, Heilongjiang University, Harbin, Heilongjiang 150080;Institute of Nature ＆ Ecology, Heilongjiang Academy of Sciences, Harbin, Heilongjiang 150040)

机构地区：[1]东北农业大学资源与环境学院,黑龙江哈尔滨150030 [2]黑龙江大学生命科学学院,黑龙江哈尔滨150080 [3]黑龙江省科学院自然与生态研究所,黑龙江哈尔滨150040

出　　处：《北方园艺》2018年第8期123-128,共6页Northern Horticulture

基　　金：国家自然科学基金面上资金资助项目(31470019);黑龙江省科学院青年基金重点资助项目(ZRT2016-1)

摘　　要：以三江平原小叶章沼泽化草甸为研究对象,采用静态箱法,研究了氮素添加对小叶章群落多样性以及CO_2排放通量的影响,以期得出群落多样性以及CO_2排放对氮沉降的响应规律。结果表明:高氮显著增加了小叶章湿地的Shannon-Wiener指数,但是低氮降低了小叶章湿地的Shannon-Wiener指数;高氮显著抑制了小叶章湿地的优势度指数,低氮也降低了小叶章湿地的优势度指数;高氮显著增加了小叶章湿地的均匀度指数,虽然低氮也增加了小叶章湿地的均匀度指数,但是差距不大。在自然对照样地中,小叶章湿地CO_2排放通量平均值为411.79mg·m^(-2)·h^(-1),而低氮样地中,小叶章湿地CO_2排放通量平均值为607.50mg·m^(-2)·h^(-1),高氮样地中,小叶章湿地CO_2排放通量平均值为608.86mg·m^(-2)·h^(-1),施氮显著增加了小叶章湿地的CO_2排放通量,但低氮与高氮处理之间差异不显著。The community diversity and CO_2 emission flux of Deyeuxia angustifolia wetland were investigated by using static box method,in order to understand the relationship of the community diversity and CO_2 emission and nitrogen deposition concentration in the Deyeuxia angustifolia marsh meadow wetland of Sanjiang Plain.The results showed that high nitrogen significantly increased the Shannon-Wiener index of the Deyeuxia angustifolia wetland,but low nitrogen decreased the Shannon-Wiener index of the Deyeuxia angustifolia wetland.High nitrogen significantly inhibited the dominance index of Deyeuxia angustifolia wetland,low nitrogen also decreased the dominance index of Deyeuxia angustifolia wetland.High nitrogen significantly increased the evenness index of Deyeuxia angustifolia wetland,although low nitrogen also increased the evenness index of Deyeuxia angustifolia wetland,but the difference was not significant.The mean value of CO_2 emission fluxes was 411.79 mg·m^（-2）·h^（-1） in the Deyeuxia angustifolia wetland and 607.50 mg·m^（-2）·h^（-1） in the lownitrogen,while in the high-nitrogen,the mean value of CO_2 emission flux was 608.86 mg·m^（-2）·h^（-1）,so nitrogen application significantly increased the CO_2 emission flux,but there was no significant difference between low nitrogen and high nitrogen treatment.

关 键 词：模拟氮沉降 小叶章湿地 群落多样性 温室气体通量 

分 类 号：S718.54[农业科学—林学]