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闽江河口湿地沉积物磷、硫及其分形研究
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摘要
以闽江河口区上、中、下段的尤溪洲、蝙蝠洲和鳝鱼滩湿地为研究区域,分别对鳝鱼滩芦苇、咸草和藨草湿地及尤溪洲和蝙蝠洲芦苇湿地沉积物P、S形态、含量和空间分布特征进行研究。结果表明:(1)闽江河口湿地沉积物OP含量范围为0.01~0.25g kg-1之间,占TP含量的1.9%~33.1%,构成OP的主要成分是MLOP和MROP,IP含量范围为0.13~1.44g kg-1之间,占TP含量的63.7%~98.5%,构成IP的主要成分是Ca-P和(Fe+Al)-P;TS含量在0.13~3.63 g kg-1之间,AS含量很少,只占TS含量的0.2%~9.5%。(2)鳝鱼滩芦苇湿地沉积物LOP、MLOP、Exch-P、(Fe+Al)-P、Ca-P及TS和AS含量均呈现出近潮沟>远潮沟的现象,差异显著(P<0.05),其余各组分含量差异不显著(P>0.05);咸草湿地各形态P含量呈现出近潮沟<远潮沟的现象,除了LOP、MROP和HROP含量在近潮沟和远潮沟区域差异显著外,其余组分含量差异不显著,TS和AS含量呈现出近潮沟>远潮沟的现象,差异极显著(P<0.01);藨草湿地沉积物各形态P含量呈现出近潮沟>远潮沟的现象,差异极显著,TS和AS含量差异不显著。(3)位于闽江河口区下段的鳝鱼滩芦苇湿地沉积物各形态OP、TS和AS含量均大于上段和中段的尤溪洲和蝙蝠洲湿地,各形态IP含量则表现为蝙蝠洲湿地最大。
The Minjiang River estuary wetland is one of the most representative and typical estuary wetland in the southeast seashore of China. This article mainly studied on P and S fractions and contents in the sediments of the Youxizhou,Bianfuzhou and Shanyutan wetland. The results indicated:(1) The sediments OP concentration ranged between 0.01-0.25g kg-1, which account for 1.9%-33.1%, of which primary fractions are MLOP and MROP; IP concentration ranged between 0.13-1.44g kg-1, which account for 63.7%-98.5%, and Ca-P and (Fe+Al)-P are the primary fractions;TS concentration ranged between 0.13~3.63 g kg-1, and AS concentration account for 0.2%-9.5%。(2) The contents of LOP、MLOP、Exch-P、(Fe+Al)-P、Ca-P、TS and AS in the sediments which in the section near the tide ditch were higher significantly than that in the area far from the tide ditch in the Phragmites australis wetland of the Shanyutan; for the Cyperus malaccensis var. wetland in the Shanyutan, the contents of P fractions of the sediments which in the section near the tide ditch were lower than that in the area far from the tide ditch, and the contents of LOP、MROP and HROP which in the section far from the tide ditch were higher significantly than that in the area near the tide ditch, but other fractions of P contents in the sections far and near the tide ditch were similar, the contents of TS and AS which in the section near the tide ditch were higher significantly than that in the area far from the tide ditch;the contents of P fractions in the sediments of Scirpus triqueter wetland in the section near the tide ditch were higher significantly than that in the area far from the tide ditch of the Shanyutan, however the contents of Ts and AS in the sections far and near the tide ditch were similar。(3) Fractions of OP、TS and AS contents in the sediments of Phragmites australis wetland in the Shanyutan were higher than that in the Bianfuzhou and Youxizhou wetland, fractions of IP contents in the sediments of the Bianfuzhou Phragmites australis wetland were the higherst in the three studied wetlands。
引文
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