The time-effect model of nitrogen and phosphate uptake by Potamogeton crispus L in eutrophic water body

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Zhang, C.Y.^1,2 ; Wang, L.P.^1 ; Xu, D.L.^2 ; Wan, L.^2 ; Yin, C.B.^2

School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou

221116, China^1

School of Environment Engineering, Xuzhou Institute of Technology, Xuzhou

221111, China^2

关键词: Biomass levels;    Ecological restoration;    Eutrophic water;    Multiple set;    Nutrient levels;    Phosphate uptake;    Theoretical modeling;    Total nitrogen;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012014/pdf
DOI  :  10.1088/1755-1315/191/1/012014

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, the effects of Potamogeton crispus L on total nitrogen (TN) and total phosphate (TP) in a eutrophic water body were explored and a time-effect model was developed for nitrogen and phosphate uptake by P. crispus. The results revealed that i) TN and TP in eutrophic water showed a trend of first decline and then increase at different P. crispus biomass levels; ii) at the same nutrient level, the amount of TN and TP uptake by P. crispus increased with increasing biomass; and iii) at the same biomass conditions, the amount of TN and TP uptake by P. crispus was the highest at nutrient levels of 13.95-20.56 mg/L for TN and 0.037-0.263 mg/L for TP. Moreover, a time-effect model was developed for TN and TP uptake by P. crispus in eutrophic conditions, as well as a TN and TP limit theoretical model. Using multiple sets of data, it was demonstrated that the models were well fitted with error rates of less than 10%. Overall, the study provides a strong basis for optimal P. crispus biomass input and harvest time in ecological restoration of eutrophic water bodies.