Effects of salinity and nitrogen and phosphorus concentrations on water quality and growth of Sesuvium portulacastrum
HAO Mingmei
Li Bin
LI Huanjun
QIAO Peng
ZHANG Mingliang
XIANG Zhiwei
NI Zhijie
SUN Yanqing
Li Meng
HU Shunxin
SUN Chunxiao
CHEN Lizhu
Abstract：Saline tolerant plant plays an important role in marine aquaculture wastewater treatment and seawater agriculture development.In order to explore the salt tolerance and nitrogen and phosphorus purification ability of S.portulacastrum,in this study,we carried out the indoor hydroponic experi-ments of S.portulacastrum salinity treatment and nitrogen and phosphorus concentration treatment.S.portulacastrum plants were grown in Hoagland nutrient solution at salinities of 0,10,20,30 and 35,respectively,in salinity experiment,and were cultured in artificial seawater with N∶0(P∶0.5)mg/L,N∶1(P∶0.1)mg/L,N∶5(P∶0.5)mg/L,N∶20(P∶2)mg/L,N∶50(P:5)mg/L,re-spectively.The treatment period was 20 days.We found that 1)the absorption effect of nitrogen and phosphorus was obvious under the condition of medium and low salinities(0～20)while the absorption effect was significantly weaker than that of the low-medium salinity groups under the condition of high salinities(30～35)(P＜0.05);2)the Na+content in S.portulacastrum tissues increased continuous-ly with the increase of salinity while the K+content showed a decreasing trend;and the effect of nitro-gen and phosphorus concentration on the content of Na+and K+was not obvious;3)under the condi-tions of all nitrogen and phosphorus treatments,S.portulacastrum grew normally and showed a high nitrogen and phosphorus removal ability,significantly reduced the nitrogen and phosphorus concentra-tions in the water.S.portulacastrum had a strong salt-tolerance ability and effectively alleviated the eutrophication,which can be used to purify the aquaculture wastewater and improve the aquaculture en-vironment.
Keywords：Sesuvium portulacastrumsalinitynitrogenphosphoruspurificationsodium ionpo-tassium ion
Publication Date：2024-04-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 125-133 )