水土保持学报2017，Vol.31Issue(3)：304-309,6.DOI:10.13870/j.cnki.stbcxb.2017.03.050
白洋淀沉积物-沉水植物-水系统氮、磷分布特征
Distribution Characteristics of Nitrogen and Phosphorus in Sediments-Submerged Macrophytes-Water Systems of Baiyangdian Lake
摘要
Abstract
Concentrations of total nitrogen (TN) and total phosphorus (TP) in submerged macrophytes,the corresponding sediments and water of the pollution admitted area,living and aquaculture area,and fringe area of Baiyangdian Lake were determined in April and September,2015.Along with the nutrient pollution assessment in the sediment,nutrient status and distribution of TN and TP in the waterbody of Baiyangdian Lake were investigated,the accumulation abilities of TN and TP by submerged plants from natural waters were also investigated.These findings contribute to the application of submerged aquatic plants to TN and TP removal from eutrophic water.The results showed that the content range of TN and TP in the surface water was 0.77-13.65 mg/L and 0.05-1.21 mg/L,respectively.The highest concentration of TN and TP were observed in the pollution admitted area,where the water quality ranged from Class IⅣ to inferior Class Ⅴ because of the influence of the Tanghe and Fuhe River.Concentrations of TN and TP in the living and aquaculture area and the fringe area were relatively insignificant (p ＞ 0.05).Nitrogen and phosphorus were mainly discharged by the rivers.Moreover,the content range of TN and TP in the surface sediments was (3.16±1.86) and (0.72±0.20) g/kg,respectively.The variation range of the standard index of TN,TP and comprehensive pollution index (PI) of the sediments in Baiyangdian Lake was 3.42-9.09,0.93-1.44,and 2.19-5.26,respectively,indicating that Baiyangdian Lake was heavily polluted,with the living and aquaculture area being more seriouly polluted than other areas.Contents of TN and TP in the sediments of the living and aquaculture area and the fringe area were relatively insignificant (p ＞ 0.05).Among the samples of submerged macrophytes,the concentration of TN was in the order of Potamogeton crispus ＞ Ceratophyllum demersum ＞ Potamogeton pecinatus,while for the concentration of TP,the order was Ceratophyllum demersum ＞ Potamogeton crispus ＞ Potamogeton pectinatus.Significant correlations were found between the concentrations of TN and TP in the water and sediments (p ＜ 0.05).The concentrations of TN and TP in submerged macrophytes were significantly positively related to the water but had no correlation with the sediments.In conclusion,submerged macrophytes showed strong TN and TP accumulation abilities,which are essential for developing strategies to engineer plants for phytoremediation.Accumulation of TN and TP by different submerged aquatic plants may influence the distribution of TN and TP in the waterbody,and the removal of shoots of submerged macrophytes is suggested for effective removal of TN and TP from the water system to avoid secondary pollution caused by excessive decomposition.关键词
氮/磷/沉水植物/白洋淀Key words
nitrogen/phosphorus/submerged macrophytes/Baiyangdian Lake分类
资源环境引用本文复制引用
王亚琼,薛培英,耿丽平,陈苗苗,孙洪欣,王殿武,冯宇佳,王晓美..白洋淀沉积物-沉水植物-水系统氮、磷分布特征[J].水土保持学报,2017,31(3):304-309,6.基金项目
国家自然科学基金项目(21407042) （21407042）
河北省自然科学基金项目(D2015204109) （D2015204109）
