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Environmental Science. 2014, (08) Core

Profile Nutrient Distribution and Sedimentary Characteristics in Typical Marshes of Sanjiang PlainChinese Full Text

LI Rui-li;CHAI Min-wei;QIU Guo-yu;SHI Fu-chen;Sasa Kaichiro;School of Environment and Energy,Shenzhen Graduate School of Peking University;College of Life Sciences,Nankai University;Field Science Center for Northern Biosphere,Hokkaido University;

Abstract: Profile distribution characteristics of organic carbon（C）,total nitrogen（N）,total phosphorus（P） and total sulfur（S）were studied in two typical marshes including Carex lasiocarpa marsh and Phragmites australis marsh in the Sanjiang Plain. Sedimentary characteristics of typical mashes were analyzed. The results showed that vertically these soil chemical elements also varied,showing obvious stratification and enrichment. In a soil profile,soil organic C under both vegetation communities gradually decreased; soil total N first increased and then decreased under both; total P under Carex lasiocarpa first decreased and then increased,whereas it decreased with the increasing depth under Carex lasiocarpa; total S was reduced with increasing depth under both marshes. Total N,total P and total S were all strongly correlated with soil organic C（P ＜ 0. 01）; soil organic C was strongly correlated with bulk density（P ＜0.01）. Our study also illustrated that the vegetation types had different influences for organic C,total N,total P and total S of the marsh profiles. Environmental137 Cs and210Pb dating techniques were applied to determine recent sedimentation rates,and the constant rate of supply（CRS） was applied to deduce the age of sediment core,and the results showed that the mean sedimentation rate was0. 33 cm·a- 1,and the sedimentation fluxes ranged 0.03-0.48 g·（cm2·a）- 1[Mean =0.29 g·（cm2·a）- 1].
Keywords：

soil nutrient; vertical distribution; sedimentation flux; marsh; Sanjiang Plain;

  • DOI：

    10.13227/j.hjkx.2014.08.013

  • Series：

  • Subject：

  • Classification Code：

    X171

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