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

CHEN Hongsen; YE Chun; LI Chunhua; CAI Xuyi; WEI Weiwei

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

Volume 10 Issue 2

Mar. 2020

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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

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

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

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

CHEN Hongsen^1,2,
YE Chun¹,
LI Chunhua¹,
CAI Xuyi^{2,*
,
,},
WEI Weiwei^{1,*
,
,}

^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);

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Corresponding author: CAI Xuyi E-mail: ensonkai@gmail.com; WEI Weiwei E-mail: weiww@craes.org.cn
Received Date: 2019-06-19
Publish Date: 2020-03-20

Abstract

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.
- aquatic macrophyte community,
- biomass,
- decomposition,
- nutrient release,
- confluence area between lake and river

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References(45)

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

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

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

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