人民长江2023，Vol.54Issue(12)：34-41,8.DOI:10.16232/j.cnki.1001-4179.2023.12.005
贵州草海沉积物中磷的形态分布及释放通量研究
Formation distribution and release fluxes of phosphorus in sediments of Caohai Lake,Guizhou Province
摘要
Abstract
Phosphorus is one of the limited factors for eutrophication of lakes.In order to understand the occurrence characteris-tics and release risks of phosphorus forms in sediment of the grass-type lakes,the phosphorus forms and release fluxes in sedi-ments of Caohai Lake of Guizhou Province were analyzed by sequential extraction and pore water diffusion model.The results showed that the content of TP in Caohai Lake sediments was 563.75～982.40 mg/kg,and the average content was(722.97±71.38)mg/kg,which was a third-order pollution.TP has significant spatial differences,with higher TP content in areas with high human activity intensity.The rank of different phosphorus forms'content was NaOH-NRP＞Res-P＞NaOH-SRP＞BD-P＞HCl-P＞NH4Cl-P.The active phosphorus(NaOH-NRP,BD-P and NH4Cl-P),which accounts for 58.05％of TP in sediments,was the main form of phosphorus in Caohai Lake.And the release fluxes were 0.03～0.08 mg/(m2·d).It indicated that the phosphorus in Caohai Lake spread from the sediment to the overlying water,showing as"source".In this study,we found that the proportion of organic phosphorus in Caohai Lake was relatively high,and the potential release risk was high.The phosphorus content and release flux in the sediments in Caohai Lake were lower than those of the algae-type lakes.The results have great significance for the conservation and management of the grass-type lakes.关键词
沉积物/磷形态/释放通量/间隙水/草海Key words
sediment/phosphorus forms/release fluxes/pore water/Caohai Lake分类
资源环境引用本文复制引用
郑菲菲,龙星宇,夏品华,林陶,董继兴..贵州草海沉积物中磷的形态分布及释放通量研究[J].人民长江,2023,54(12):34-41,8.基金项目
贵州省黔科合平台人才项目([2018]5069-24) （[2018]5069-24）
贵州基础研究计划项目(科学技术基金)(黔科合基础-ZK[2021]一般073) （科学技术基金）
