中文摘要：

2008年调水调沙期间在黄河利津采集悬浮颗粒物样品,并采用水淘选法对样品进行了粒径分级,应用改进后的SEDEX法对颗粒物中磷的赋存形态进行了分析.结果表明,自生磷灰石磷和有机磷是调水调沙期间黄河悬浮颗粒物中磷的主要赋存形态;调水调沙期间悬浮颗粒物中总磷、弱吸附态磷、有机磷和非活性有机磷的含量低于非调水调沙时期,而碎屑磷灰石磷的含量高于非调水调沙时期;粒径是影响悬浮颗粒物中各形态磷含量的重要因素,弱吸附态磷、有机磷和非活性有机磷在细颗粒中含量较高,而碎屑磷灰石磷在粗颗粒中含量较高;调水调沙期间生物可利用磷的含量约占颗粒态总磷的28.3%,其中有机磷又是生物可利用磷的主要组成部分;2008年调水调沙期间黄河输送的泥沙、颗粒态磷和潜在的生物可利用磷总量分别为6.63×10^7、3.42×10^4和8.30×10^3 t,分别占全年输送通量的83.2%、78.6%和80.2%.

英文摘要：

Suspended particulate matter samples were collected from Lijin Station on the Yellow River during the 2008 water and sediment regulation.Using water elutriation method,samples were physically separated according to grain size,and phosphorus forms were detected by the improved SEDEX technology.Results show that authigenic apatite phosphorus and organic phosphorus are the dominant forms of the particulate phosphorus.During water and sediment regulation,concentrations of total particulate phosphorus,loosely adsorbed phosphorus,organic phosphorus and refractory phosphorus are lower than those in other time of the year,while the concentration of detrital fluorapatite phosphorus is higher than that in other time.Grain size is the primary variable in the determination of the content of various particulate phosphorus forms.In fine particles,loosely adsorbed phosphorus,organic phosphorus and refractory phosphorus concentrations are high,while detrital fluorapatite phosphorus concentration is high in coarse particles.About 28.3% of the total particulate phosphorus is in the form of bio-available phosphorus,of which organic phosphorus is the major component.During the water and sediment regulation,the fluxes of sediment,particulate phosphorus and particulate bio-available phosphorus are 6.63 × 10^7 t,3.42 × 10^4 t,and 8.30 × 10^3 t,which are 83.2%,78.6%,and 80.2% each of the total fluxes in 2008.