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《Chinese Journal of Applied Ecology》 2000-06
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Nitrogen content variation in litters of Deyeuxia angustifolia and Carex lasiocarpa in Sanjing plain.

LIU Jingshuang and SUN Xueli and YU Junbao (Changchun Institute of Geography,Chinese Academy of Sciences, Changchun 130021).  
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·m -2 , C.lasiocarpa 587mg·m -2 ,while the annual accumulative nitrogen output amount in litter of D.angustifolia community was 759mg·m -2 , C.lasiocarpa 410mg·m -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.
【Fund】: 中国科学院长春地理所所长基金资助项目!(CCIG 960 3)
【CateGory Index】: Q945
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