摘要
[目的]探讨水葫芦生长对水质的影响规律。[方法]对一水葫芦分布密度和盖度较高的河流选取3个点进行跟踪调查研究,分出苗期、生长初期、生长盛期、生长后期、枯死期以及沉淀期,对水体中水温、透明度、pH、溶解氧、总氮含量以及总磷含量进行定点检测。[结果]5～9月是水葫芦生长旺盛期,随着其生命活动的加强,水体透明度逐渐增加,溶解氧含量有所增加;同时,水体中总氮、总磷含量明显下降;10～12月,当水葫芦生物量扩大到一定程度时,水质逐渐恶化,透明度又明显降低,水中溶解氧减少;同时总氮、总磷含量增加,水体呈富营养化。[结论]水葫芦在不同生长时期对水质的影响不同,在生长盛期对水质有一定的净化作用,在生长后期和枯死期又会引起水质恶化。
[Objective] The aim was to explore the effects of the growth of water hyacinth on water quality.[Method]Three sites along a river with abundant water hyacinth were selected,and the main water quality parameters of water temperature,SD,pH value,DO,T-N and TP were studied through six different growth stages,namely the seedling stage,the early stage,the grand period of growth,the later growth stage,the die stage and the precipitation stage.[Result]Vigorous growing state of water hyacinth were during May-September,with the strengthening of life activities,the transparency of water body would reducing gradually,Dissolved Oxygen content would increase;meanwhile,TN and TP contents decreased obviously.During October-December,when the biomass of water hyacinth enlarged to some extent,it would cause the deterioration of water quality,the reduction of transparency,the decrease of Dissolved Oxygen;meanwhile,TN and TP contents increased,water body showed eutrophication.[Conclusion]Water hyacinth in different growth stages has different influence on water quality;in the grand period of growth,it has the effect of purification,while in the later growth stage and the die stage,it will cause the water quality deterioration.
出处
《安徽农业科学》
CAS
北大核心
2011年第34期21228-21230,共3页
Journal of Anhui Agricultural Sciences
基金
湖南省科技厅资助项目(06CK3049)
常德市科技局资助项目(2008SK01)
湖南文理学院创新团队项目(05CK01)
关键词
水葫芦
水质
影响规律
净化
恶化
Water hyacinth（E.crassipes）
Water quality
Effect
Purification
Deterioration
作者简介
王云（1974-），男，湖南澧县人，副教授，在读博士，从事资源与环境方面的研究，E—mail：wangyunl211@126．com。
