华东师范大学学报（自然科学版）Issue(1)：54-65,12.DOI:10.3969/j.issn.1000-5641.2026.01.005
水力扰动和水位变化对苦草(Vallisneria natans)生长及水体水质影响的实验研究
Effects of hydraulic disturbance and water level changes on the growth of Vallisneria natans and water quality
摘要
Abstract
Vallisneria natans is a submerged plant that is commonly used in ecological restoration programs.However,the effects of hydraulic disturbance and changes in water levels on the growth of this plant and the quality of water bodies have yet to be sufficiently established.In this study,we examined the effects of single and combined hydrodynamic stresses on the physiological and biochemical characteristics of bitter grass and water quality based on controlled experiments assessing different water levels(45 and 80 cm)and disturbance durations(4 and 8 h).The results indicated that high water levels with short-term disturbance(80 cm,4 h)were associated with significant increases in the contents of dissolved oxygen to 9.1 mg/L(11.0%higher than that under non-disturbed conditions),and effectively reduced the concentrations of total nitrogen(1.85 mg/L),ammonia-nitrogen(0.20 mg/L),and nitrate-nitrogen(0.19 mg/L),while maintaining the lowest oxidative stress levels(peroxidase activity:5.73 U/(g·min),superoxide dismutase activity:17.6 U/g)and highest chlorophyll content(8.98 mg/g).These findings indicated that moderate levels of disturbance can optimize light utilization efficiency via an enhancement of water mixing and promote plant growth.In addition,two-way ANOVA revealed the significant interactive effects of water levels and disturbance on biological oxygen demand and total nitrogen concentration(p<0.05).On the basis of these findings,we propose an optimal regulation strategy of"high water levels(≥80 cm)combined with short-term disturbance(≤4 h)",providing a theoretical basis for the synergistic restoration of submerged vegetation and improvements in aquatic environments within urban landscapes.These findings have practical significance for maintaining ecosystem stability in shallow lakes.关键词
水力扰动/水位变化/苦草/生理生化指标/水生态系统Key words
hydraulic disturbance/change in water level/Vallisneria natans/physiological and biochemical indices/aquatic ecosystem分类
资源环境引用本文复制引用
郁梦媛,邱长能,黄民生,张彤,周耀,余意,易阳阳..水力扰动和水位变化对苦草(Vallisneria natans)生长及水体水质影响的实验研究[J].华东师范大学学报（自然科学版）,2026,(1):54-65,12.基金项目
水污染防治与利用山西省重点实验室建设期科研计划项目(SWRFZYLY202502,SWRFZYLY202503) （SWRFZYLY202502,SWRFZYLY202503）
