The Vertical Distributions of Nitrogen and Phosphorus in the Sediment and Interstitial Water in Taihu Lake and Their Interrelations

Citations Over Time

Abstract

对太湖主要湖区柱状样底泥的总氮、总磷含量及其间隙水铵态氮 (NH₄+ N)、磷酸根磷 (PO₄3--P)和二价铁 (Fe(Ⅱ))含量进行了分析,并对底泥和间隙水中相应物质含量进行了比较.结果表明:太湖近表层 10cm内底泥TN、TP赋存含量较之下层高 12%-2 0%左右,间隙水中PO₄3--P和NH₄+ N含量随深度增加而大致呈上升趋势,表层未见高浓度层存在.各湖区底泥间隙水中PO₄3--P和NH₄+ N浓度与底泥中TP含量未发现有明显的相关关系.但间隙水中Fe(Ⅱ)含量与NH₄+ N含量呈显著的正相关 (R=0.92 34).;The contents of nit rogen and phosphorus and ferrous in the column sediments and their interst itial water were analy zed and compared in the main regions of Taihu Lake in 1998.The results show that the upper layer(0-10cm) contained higher contents in TN and TP and than the lower.And NH₄-N and PO₄-P in the interstitial water are a bit higher in the seriously-polluted waters than those in the gent ly-polluted waters.However, those of the lower layers are slightly higher in the gently-polluted waters than those in the seriously-polluted.It was indicated that there was no distinct corresponding relationships between NH₄-N/PO₄-P contents in the interstitial water and TN/TP contents in the sediments.The ferrous concentration in the interstitial water is distinctly in positive correlation with NH₄-N content (R=0.9234).

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