Comparative Studies on Nitrogen Removal Between Eichhornia crassipes and Pistia stratiotes in Lake Dianchi Caohai, China

• Published in: Journal of agricultural resources and environment 2015-01, Vol.32 (4), p.388
• Main Authors: Xue-Zheng, Wen, Hai-Qin, Liu, Ying-Ying, Zhang, Han, Ya-Ping, Hong-Jie, Qin, Zhang, Zhi-Yong
• Format: Article
• Language: Chinese
• Subjects: Ammonium; Aquatic plants; Comparative studies; Eichhornia crassipes; Engineering; Environmental science; Eutrophic environments; Eutrophic waters; Eutrophication; Experiments; Lakes; Nitrates; Nitrogen; Nitrogen enrichment; Nitrogen removal; Phosphorus; Pistia stratiotes; Seedlings; Water loss; Water quality
• ISSN: 2095-6819; 2095-6819
• DOI: 10.13254/j.jare.2014.0312

In order to compare two different floating aquatic plants about the nitrogen removal effect of eutrophic water in Lake Dianchi Cao-hai, Eichhornia crassipes and Pistia stratiotes were employed to microcosm experiments. Results showed that Eichhornia crassipes and Pistia stratiotes had no obvious difference on the ability of nitrogen enrichment and the total nitrogen removal rate. Under the water total nitrogen（TN）, dissolved total nitrogen（DTN）, nitrate（NO3--N）, ammonium（NH4+-N）initial concentration of 8.40, 7.20, 4.12, 2.59 mg·L-1, Eichhornia crassipes and Pistia crassipes seedlings were 1 kg, the average total nitrogen（TN）, dissolved total nitrogen（DTN）, nitrate（NO3--N）,ammonium（NH4+-N）removal rate of Eichhornia crassipes test group were 74.24%, 76.81%, 87.62%, 80.30% respectively; The average total nitrogen（TN）, dissolved total nitrogen（DTN）, nitrate（NO3--N）, ammonium（NH4+-N）removal rate of Pistia crassipes test group were 70.10%,78.89%, 94.77%, 87.64% respectively. The average assimilation away from total