Phosphorus fractionation and bio-availability in Taihu Lake (China) sediments.
Phosphorus fractionation and bio-availability in Taihu Lake (China) sediments.
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DOI：
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发表时间：
2005
影响因子：
6.9
通讯作者：
Aimin Zhou;Dong-sheng Wang;Hong-xiao Tang
中科院分区：
文献类型：
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作者：
Aimin Zhou;Dong-sheng Wang;Hong-xiao Tang
以太湖典型沉积物为研究对象，采用连续提取法对太湖沉积物中的磷进行了分级分析。太湖沉积物中无机磷可分为4种形态，其平均含量大小顺序为NaOH-P > BD-P > HCI-P > NH_4Cl-P，BD-P含量与活性铁含量呈线性相关（R2 = 0.96）。6种沉积物中BD-P和NaOH-P的总量与活性铁和活性铝的总量呈线性关系（R2 = 0.96）。太湖沉积物中生物可利用磷（BAP）含量为0.10 ~ 1.25 mg/g dw，平均0.40 mg/g dw。BAP对沉积物总磷和无机磷的相对贡献率分别为18.67%~ 50.79%（平均33.61%）和52.82%~ 82.09%（平均67.81%）。
Typical sediments from Taihu Lake, a meso-to-hypereutrophic lake, were collected and examined on the basis of P-fractionation by sequential extraction scheme. Sedimentary inorganic phosphorus were fractioned into four forms and the rank order according to the mean concentration of P-fractions in Taihu Lake was NaOH-P > BD-P > HCI-P > NH4Cl-P. The concentrations of BD-P were linearly correlated with the content of active Fe (R2 = 0.96). Also, the linear relationship between the sum of BD-P and NaOH-P and the sum of active Fe and active Al content was observed within the six sediments investigated (R2 = 0.96). Moreover, the bio-available phosphorus (BAP) content was estimated by the sum of NH4 Cl-P, BD-P, and NaOH-P, viz. BAP = NH4 Cl-P + NaOH-P + BD-P. In Taihu Lake, the BAP contents are ranging from 0.10 mg/g dw to 1.25 mg/g dw, and average 0.40 mg/g dw for all sediment samples. The relative contributions of BAP to total sedimentary phosphorus (TP) and inorganic sedimentary phosphorus (IP) range from 18.67% to 50.79% (33.61% on average) and from 52.82% to 82.09% (67.81% on average), respectively.