三江平原小叶樟、毛果苔草枯落物中氮素变化分析

应用生态学报 ›› 2000, Vol. ›› Issue (6): 898-902.

三江平原小叶樟、毛果苔草枯落物中氮素变化分析

刘景双, 孙雪利, 于君宝

中国科学院长春地理研究所, 长春130021

收稿日期:1998-08-20 修回日期:1999-07-07 出版日期:2000-12-25
通讯作者: 刘景双,男,1956年生,研究员,博士导师,主要从事环境地学和环境生态学等方面的研究工作,发表论文40余篇.E-mail:Liujingshuang@mail.ccig.ac.cn
基金资助:
中国科学院长春地理所所长基金资助项目(CCIG9603)

Nitrogen content variation in litters of Deyeuxia angustifolia and Carex lasiocarpa in Sanjing plain

LIU Jingshuang, SUN Xueli, YU Junbao

Changchun Institute of Geography, Chinese Academy of Sciences, Changchun 130021

Received:1998-08-20 Revised:1999-07-07 Online:2000-12-25

摘要/Abstract

摘要： 以三江平原沼泽湿地主要优势植物小叶樟(Deyeuxia angustifolia)和毛果苔草(Carex lasiocarpa)枯落物为例,探讨了N素在枯落物中的季节变化、含量特征以及对维持生态系统物质平衡的作用.结果表明,枯落物N含量随气温升高和地上生物量增大而减少;枯落物失重率随时间延长而增大;小叶樟年累积失重率为32.2%,毛果苔草为27.7%;小叶樟群落N素年累积输入量为1478mg·m^-2,毛果苔草为587mg·m^-2;小叶樟群落枯落物年累积输出N素759mg·m^-2,毛果苔草为410mg·m^-2.输入大于输出,N素处于累积状态,有利于生态系统稳定.

Abstract: This paper dealt with the litter of two dominant species Deyeuxia angustifolia and Carex lasiocarpa in swamp of Sanjiang Plain,and analyzed the seasonal variation and content feature of nitrogen in litter and its roles on maintaining matter equilibrium in ecosystems.The nitrogen content in litter decreased with the increasing temperature and aboveground biomass.The weightlessness rate of litter increased with time,and the annual accumulative weightlessness rates of D.angustifolia and C.lasiocarpa were 32.2% and 27.7%,respectively.The annual accumulative nitrogen input amount of D.angustifolia community was 1478mg穖^-2, C.lasiocarpa 587mg穖^-2,while the annual accumulative nitrogen output amount in litter of D.angustifolia community was 759mg穖^-2, C.lasiocarpa 410mg穖^-2.It was suggested that the nitrogen input amount was higher than output,and that the state of nitrogen accumulation was beneficial to the stability of the ecosystems.

刘景双, 孙雪利, 于君宝. 三江平原小叶樟、毛果苔草枯落物中氮素变化分析[J]. 应用生态学报, 2000, (6): 898-902.

LIU Jingshuang, SUN Xueli, YU Junbao. Nitrogen content variation in litters of Deyeuxia angustifolia and Carex lasiocarpa in Sanjing plain[J]. Chinese Journal of Applied Ecology, 2000, (6): 898-902.