影响湖泊底泥生物有效磷的环境因子灰色关联分析

Gray Relation Analysis on Environmental Factors Affecting Biological Available Phosphorus in Lake Sediment

采用灰色关联分析方法,对天鹅湖湖泊底泥中生物有效磷(BAP)含量与其它相关环境因子的相关性进行了研究。结果表明:底泥生物有效磷的检测浓度在81.62～151.47 mg/kg之间,底泥的氧化还原电位、pH、烧矢量、含水率和总磷浓度分别为67～195 mV、6.68～7.79、4.39%～6.81%、21.89%～51.78%、285.78～552.94 mg/kg。总磷、有机质、氧化还原电位、含水率、pH值与底泥生物有效磷含量的关联度分别为0.8170、0.6530、0.5658、0.6909、0.4471。因此总磷对BAP的影响最大,含水率、有机质和氧化还原电位次之,pH值的影响最小。

In the paper,based on the determination data of the biological available phosphorus（BAP） and related environmental factors in the sediment of Swan Lake,gray relation analysis method was used to analyze the correlation between BAP and other environmental factors.The results showed that the concentration of BAP in the sediment varied from 81.62 to 151.47 mg/kg,the Eh,pH-value,loss of ignition,water content and total phosphorus content in the sediment was 67～195 mV,6.68～7.79,4.39%～6.81%,21.89%～51.78% and 285.78～552.94 mg/kg respectively.The relational degree of total phosphorus,organic matter,Eh,water content,pH-value with BAP in the sediment was 0.8170,0.6530,0.5658,0.6909 and 0.4471 respectively.Thus total phosphorus had the greatest influence on BAP,followed by water content,organic matter and Eh,while the effect of pH-value on BAP was the least.