中南民族大学学报（自然科学版）2026，Vol.45Issue(4)：456-462,7.DOI:10.20056/j.cnki.ZNMDZK.20260704
不同磷浓度和光照培养对密刺苦草及附生席藻生长的影响
Effects of different phosphorus concentrations and light conditions on the growth of Vallisneri denseserrulata Makino and epiphytic Phormidium sp.
摘要
Abstract
Light and nutrient salts are important environmental factors affecting the restoration and reconstruction of submerged macrophyte in eutrophic water.In order to explore the impacts of light intensity and exogenous phosphorus addition on submerged plants and epiphytic cyanobacteria,the physical and chemical factors,biomass and coverage of Phormidium sp.and physiological indicators of Vallisneri denseserrulata Makino(V.denseserrulata Makino)in water under different light intensity(30～115 μmol·m-2·s-1)and phosphorus concentration(0～10 mg·L-1)were determined by laboratory simulation experiments with V.denseserrulata Makino and their epiphytes as the research objects.The results showed that the biomass and coverage of Phormidium sp.increased by 74.5％and 57.5％respectively under strong light compared with low light,indicating that the biomass of Phormidium sp.increased with the increase of light in a certain range.In the early stage of the experiment,the addition of high concentration of exogenous phosphorus caused a rapid increase in the biomass of Phormidium sp..At the same time,it was found that with the increase of light and phosphorus nutrient concentration,Phormidium sp.transformed from attached biofilm to planktic algal gonium,and the influence of light on the life pattern of Phormidium sp.was significantly greater than that of phosphorus nutrient salt(P＜0.05).Compared with low light,the root length,root number and dry weight of V.denseserrulata Makino increased by 74.6％,54.2％and 43.6％,respectively,under high light,indicating that low light inhibited the root length.At the same time,under the condition of high concentration of phosphorus nutrients,the biomass was accumulated by reducing root length to increase plant number,plant height and root number.关键词
光照/磷/席藻/苦草Key words
light/phosphorus/Phormidium sp./Vallisneri denseserrulata Makino分类
资源环境引用本文复制引用
庞炜杰,贾晓悦,杨天羽,夏爽,裴国凤..不同磷浓度和光照培养对密刺苦草及附生席藻生长的影响[J].中南民族大学学报（自然科学版）,2026,45(4):456-462,7.基金项目
国家自然科学基金资助项目(30970550) （30970550）
中央高校基本科研业务费专项资金资助项目(CZQ23021) （CZQ23021）
