不同预处理方法对湖泊沉积物有机磷分级的影响

应用了冷冻干燥后过100目筛(A)，冷冻干燥后制备自然粒度(B)和新鲜样品(C)3种湖泊沉积物样品常用预处理方法，以太湖不同湖区的4个沉积物样品为研究对象，研究了不同预处理方法对湖泊沉积物有机磷分级的影响。结果表明，从研究湖泊沉积物各有机磷组分背景值的角度来讲，A处理方法所得结果可以较为真实的反映湖泊沉积物各有机磷组分的实际情况。但是，从研究湖泊生态系统磷循环的角度来讲，B处理方法所得结果可能更加接近实际情况。而C处理方法所得结果则在一定程度上低估了各有机磷组分，特别是对有机磷组分中有效性较强的LOP和MLOP影响较大，对MROP有一定影响，而对HROP含量的影响很小。

Effect of Different Pretreatments on Organic Phosphorus Fractions in Lake Sediment

The three kinds of pretreatments that were the freeze-dried, ground past 100 meshes (pretreatment A), freeze-dried, natural grain size (pretreatment B) and fresh sediment sample (pretreatment C) were chosen to study the effect of different pretreatments on organic phosphorus fractions in lake sediment. The 4 sediment samples that were from the different parts of Taihu Lake were investigated. The results indicated that the results of A over-accounted the contents of different organic phosphorus fractions of the studied sediment samples, and that of C were the lower-accounted, the effect is the largest, especially for the LOP and MLOP that is more bio-available, there is certain influence to the MROP and very small to the HROP. The results of B can reflect the actual condition of lake sediments, especially from the point of phosphorus cycling in lake eco-system; the pretreatment B is the most suitable pretreated method.