人民长江2026，Vol.57Issue(4)：134-141,151,9.DOI:10.16232/j.cnki.1001-4179.2026.04.016
典型小型湖泊不同深度底泥氮磷释放特征
Characteristics of nitrogen and phosphorus release from sediments at different depths in a typical small lake
摘要
Abstract
Endogenous release from the sediments in small lakes is a major cause of excessive nitrogen and phosphorus concen-trations in the overlying water;however,research in this area remains insufficient.To investigate the mechanisms of release of ni-trogen and phosphorus from sediments affecting water quality,we took Jiaolu Lake,a typical small lake severely polluted by nitro-gen and phosphorus,as a case study.Sediment samples from the upper 90 cm were collected and simulated release experiments at different depths(0～90 cm)under varying environmental conditions(temperature,pH,and dissolved oxygen)were conducted to examine their effects on the release of total phosphorus(TP)and total nitrogen(TN)from the sediments.The results indicate that TP and TN in the 0～30 cm sediment layer are at severely polluted levels(TP:996.47～1 083.69 mg/kg;TN:2 097.24～2 169.89 mg/kg),and their release has the most significant impact on the overlying water.TP release decreases with increasing depth,while TN release remains largely unchanged with depth.Environmental conditions exert a significant regulatory effect on ni-trogen and phosphorus release:both rising temperature and decreasing dissolved oxygen promote nitrogen and phosphorus release.TN release decreases with increasing pH,while TP release is weakest under neutral conditions.The study clarifies that endogenous release from sediments is a key factor contributing to persistent water pollution,and the findings provide a scientific basis for the management of small eutrophic lakes.关键词
TN/TP/底泥氮磷释放/模拟释放实验/叫驴湖/小型湖泊Key words
TN/TP/nitrogen and phosphorus release from bottom sediments/simulated release experiment/Jiaolü Lake/small lakes分类
资源环境引用本文复制引用
王越,马华忠,张占鹏,叶凌峰,李晔,娄保锋..典型小型湖泊不同深度底泥氮磷释放特征[J].人民长江,2026,57(4):134-141,151,9.基金项目
国家自然科学基金项目(52270166) （52270166）
中交和美环境生态建设有限公司科技研发项目(KJFZ-2021-008-001) （KJFZ-2021-008-001）
