不同方法测定沉积物中生物可利用性磷对铜绿微囊藻生长量的影响

发布时间：2018-04-28 10:52

本文选题：梯度扩散薄膜(DGT) + 铜绿微囊藻　；参考：《中国环境科学》2011年09期

【摘要】：采用梯度扩散薄膜(DGT)技术,以太湖9个采样点所采集的27个沉积物柱样为研究对象,研究沉积物中DGT所测量的磷浓度(DGT-P)与铜绿微囊藻生长量之间的关系,同时与4种常规的生物可利用性磷方法[(水溶性磷(WSP)、易解析磷(RDP)、藻可利用磷(AAP)和NaHCO3提取磷(Olsen-P))]进行比较,评价不同提取方法获得的太湖沉积物生物可利用性磷与铜绿微囊藻生长量的关系.结果表明,DGT-P与藻生长量的相关系数为R2=0.941(P0.01),高于4种生物可利用性磷提取法的相关系数(WSP,0.780、RDP,0.806、AAP,0.849、Olsen-P,0.910).结果表明DGT技术可以作为预测原位沉积物磷的生物可利用性的工具.
[Abstract]:The relationship between the phosphorus concentration measured by DGT and the growth of microcystis aeruginosa was studied by gradient diffusion thin film (DGTT) technique. 27 sediment column samples collected from 9 sampling sites in Taihu Lake were used to study the relationship between the phosphorus concentration measured by DGT and the growth of microcystis aeruginosa. At the same time, it was compared with four conventional bioavailable phosphorus methods [(water soluble phosphorus (WSP), easy to resolve phosphorus (RDP), algae can use phosphorus (AAP) and NaHCO3 to extract phosphorus (Olsen-Pu)]. To evaluate the relationship between bioavailable phosphorus and microcystis aeruginosa growth in sediments of Taihu Lake obtained by different extraction methods. The results showed that the correlation coefficient between DGT-P and algal growth was R20.941 P0.01C, which was higher than that of four bioavailable phosphorus extraction methods. The results show that DGT technique can be used as a tool to predict the bioavailability of phosphorus in situ sediments.
【作者单位】：南京大学环境学院污染控制与资源化研究国家重点实验室;
【基金】：水体污染控制与治理科技重大专项(2008ZX07316-004) 欧盟科技合作项目(0911) 国家自然科学基金资助项目(21077051)
【分类号】：X173

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