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入湖河口区水生植物群落衰亡分解释放营养盐过程模拟研究

陈洪森,  叶春,  李春华,  蔡绪贻,  魏伟伟

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文章导航 > 环境工程技术学报  > 2020 >  10(2): 220-228
陈洪森, 叶春, 李春华, 蔡绪贻, 魏伟伟. 入湖河口区水生植物群落衰亡分解释放营养盐过程模拟研究[J]. 环境工程技术学报, 2020, 10(2): 220-228. doi: 10.12153/j.issn.1674-991X.20190108
引用本文: 陈洪森, 叶春, 李春华, 蔡绪贻, 魏伟伟. 入湖河口区水生植物群落衰亡分解释放营养盐过程模拟研究[J]. 环境工程技术学报, 2020, 10(2): 220-228. doi: 10.12153/j.issn.1674-991X.20190108
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CHEN Hongsen, YE Chun, LI Chunhua, CAI Xuyi, WEI Weiwei. Simulation study on decomposition and release of nutrients from aquatic macrophyte communities in confluence area between lake and river[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 220-228. doi: 10.12153/j.issn.1674-991X.20190108
Citation: CHEN Hongsen, YE Chun, LI Chunhua, CAI Xuyi, WEI Weiwei. Simulation study on decomposition and release of nutrients from aquatic macrophyte communities in confluence area between lake and river[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 220-228. doi: 10.12153/j.issn.1674-991X.20190108
shu

入湖河口区水生植物群落衰亡分解释放营养盐过程模拟研究

doi: 10.12153/j.issn.1674-991X.20190108

  • 1. 湖泊水污染治理与生态修复技术国家工程实验室,中国环境科学研究院

  • 2. 中国地质大学(北京)水资源与环境学院

详细信息
    作者简介:

    陈洪森(1994—),男,硕士研究生,研究方向为湖泊水环境生态修复,CHS13137843196@163.com。

    通讯作者:

    蔡绪贻 E-mail: ensonkai@gmail.com

    魏伟伟 E-mail: weiww@craes.org.cn

  • 中图分类号: X524

Simulation study on decomposition and release of nutrients from aquatic macrophyte communities in confluence area between lake and river

  • 1. National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences
    2. College of Water Resources and Environment, China University of Geosciences (Beijing);

More Information
    Corresponding author: CAI Xuyi E-mail: ensonkai@gmail.com; WEI Weiwei E-mail: weiww@craes.org.cn

    摘要
  • 摘要: 冬春季水生植物衰亡分解是影响水体水质的重要因素之一。为研究入湖河口区水生植物群落在衰亡期的适宜生物量,于2018-12-25—2019-04-25,在实验室模拟近自然条件下,开展水生植物收割后剩余0%、20%、40%、60%、80%、100%茎叶生物量的分解试验。结果表明:水生植物分解过程中,植物茎叶生物量是影响水体水质指标的关键因子,表现为茎叶生物量越大,水体溶解氧(DO)、氧化还原电位(Eh)、pH等理化指标越差,营养盐总氮(TN)、总磷(TP)浓度越高;相关性分析表明,茎叶生物量与水体TN、TP浓度存在极显著正相关(P<0.01),相关系数(R)分别为0.88和0.83;近自然条件下水生植物群落衰亡分解4个月,水体中各营养盐浓度的变化仍未稳定;收割后剩余20%的水生植物茎叶生物量有利于维持入湖河口区较好的水质。

     

    Abstract: Decomposition of aquatic macrophyte in winter and spring is one of the important factors affecting the water quality. In order to study the suitable biomass of the declining aquatic macrophyte community in confluence area between lake and river, the decomposition experiments of the biomass of stems and leaves of remaining 0%, 20%, 40%, 60%, 80% and 100% aquatic plants after harvesting were conducted in laboratory from December 25, 2018 to April 25, 2019 in near-natural conditions. The results showed that in the decomposition process of aquatic macrophyte, the biomass of stems and leaves was the key factor affecting the nutrient concentration in water, mainly showing that the larger the biomass, the worse the physical and chemical indicators of DO, Eh and pH, and the higher the nutrient concentrations of TN and TP. The correlation analysis showed that the biomass of stems and leaves of aquatic macrophyte was significantly positive correlated with the content of total nitrogen and total phosphorus in water (P<0.01), and the correlation coefficient (R) was 0.88 and 0.83, respectively. Under near-natural conditions, aquatic macrophyte decomposed for 4 months, and the changes of nutrient content were still not stable. The remaining 20% of the biomass of stems and leaves of aquatic macrophyte after harvesting was conducive to maintaining better water quality in confluence area between lake and river.

     

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