海马齿对海水养殖系统中氮、磷的移除效果研究

大量的外源性饵料和排泄物使海水养殖水体N、P以及有机物大量增加,导致水质恶化,是制约海水养殖业发展的主要因素。通过构建海马齿面积比为3∶2盐度为15的A、B 2组浮床海水养殖系统,以检验海马齿的N、P移除能力。结果显示,当海马齿处于生长启动期,A组和B组的水质指标与对照组之间无显著性差异（P〉0.05）;但当海马齿生长...

Research on Effects of Nutrient and Phosphate Removal from Marine Aquaculture System by Sesuvium portulacastrum

Lots of exogenous feed and fish excreta make the nutrient, phosphate and organic increase, cause water quality deterioration. This is a main restricted factor to the development of marine aquaculture. Group A and group B floating marine aquaculture systems were constructed which area ratio of plants was 3： 2. The study was conducted to examine the N, P removal ability of Sesuvium portulacastrum. After two months of treatment, Sesuvium portulacastrum grew well at salinity 15, group A and B showed efficient N, P removal ability, but there was no significant difference （ P 〉 0.05 ） between them. When the plants grew stable, the results showed that group A and B had excellent removals, with efficiencies 74 % - 91% and 60% - 91% for ammonia nitrogen, 93 % - 98 % and 71% - 97% for nitrite nitrogen, 11%-25% and 14%-33% for total nitrogen, 67%-85% and 61% -81% for COD and 41% -68% and 35% -71% for total phosphorus. The group A and B have significant difference （P 〈0.05） with control group for the concentration of ammonia nitrogen, nitrite nitrogen, COD and total phosphorus. The total nitrogen removal couldn＇t examined yet, but the ammonia nitrogen and nitrite nitrogen removal reacted rapidly when the system were constructed, the concentration were well below the toxic levels. Accordingly, Sesuvium portulacastrum can efficiently absorb N and P, reducing COD and organic pollution, improve the marine aquaculture environment at salinity 15.