中国科学院重庆绿色智能技术研究院机构知识库

The article set up model of phosphorus-algae on the basis of establishing total phosphorus model in early period. From the start of inorganic salts represented by orthophosphate and organophosphorus represented by algal biomass, it analyses at high water level stages, kinds of form transformation and cycle mechanism of accumulated phosphorus due to impounding stage in order to explain the source of the phosphorus which is consumed by the outbreak of water bloom at the end of winter from fixed quantity and fixed nature two parts. The research shows that the total phosphorus of phosphorus pool in the three phases of impounding stage, stable stage and algae bloom stages at high water level in Lake Gaoyang is totally different. Water-level-fluctuating zone with phosphorus release is a major source of solubility reactive phosphorus at high water level in Lake Gaoyang (72.69% of the total input flux), which is related to the area of water-level-fluctuating zone and the phosphorus exchange rate in the soil and water interface of water-level-fluctuating zone. More flooded area, the higher exchange rate of phosphorus, more phosphorus release, the greater contribution of the phosphorus cycle. And the maximum synthetic ratio of phosphorus-algae was only 14.4%. However, the amount of utilized phosphorus at algal bloom stage was small. © 2016 by Journal of Lake Sciences.

通过在前期建立的总磷模型基础上建立磷-藻模型. 从正磷酸盐所代表的无机磷和藻类生物量所代表的有机磷入手,分析蓄水期所累积的磷在高水位时期各种形态转化和循环机制,以期从定性和定量两方面说明冬季末水华暴发所消耗磷的来源. 研究表明: 高水位蓄水期、稳定期和水华期这3个阶段中各磷库磷通量各不相同. 淹没消落带磷释放是该时期高阳平湖溶解性正磷酸盐的主要来源(占总输入通量的72.69%),其释放量与被淹没消落带面积和消落带水土界面磷交换速率有关,淹没消落带面积越多,磷交换速率越高,磷释放量越大,对整个磷循环的贡献越大. 但水华期间藻磷的合成率最大仅为14.4%,藻类对冬季高水位期间所积累磷的利用量依然相对较低.