Study On Phosphorus And Sulphur Fractions In The Sediments Of The Minjiang River Estuary

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。...