实验选取了经济价值较高、生态特征较为明显且研究较为深入的三种大型海藻：海带(Laminaria ja-ponica Aresch)、鼠尾藻(Sargassumthunbergii)和龙须菜(Gracilaria lemaneiformis)作为实验材料,在模拟自然环境条件(14℃、1500 lx)和适宜的氮、磷浓度(50μmol/L、5μmol/L)下,研究其在72 h内对氮、磷的吸收能力。实验数据测得,海带、鼠尾藻和龙须菜对氨氮吸收速率分别为0.397μmol/g·h、0.317μmol/g·h和0.300μmol/g·h,吸收效率为66.3%、53.6%和51.2%；对磷的吸收速率分别为0.036μmol/g·h、0.030μmol/g·h和0.033μmol/g·h,吸收效率为65.2%、55.7%和58.8%。结果表明,三种海藻对氮、磷均有明显的吸收效果,吸收能力顺序为：海带>龙须菜>鼠尾藻。%This article has selected three more in-depth study on the ecological characteristics seaweed of high economic value:Laminaria japonica Aresch ,thunbergii ,Gracilaria lemaneiformis,Study on their absorptive capacity of nitrogen and phosphorus in 72h under the natural environment (14℃, 1500 lx )and appropriate concentrations of nitrogen and phosphorusin (50μmol/L,5μmol/L).The experiment measured,Laminaria japonica Aresch,Sargassum thunbergii ,Gracilaria lemaneifor-mis’s absorption rate of ammonia nitrogen is 0.397μmol/g·h 0.317μmol/g·h and 0.300μmol/g· h .Their removal ratio of ammonia nitrogen in the cultivation water is 6 6 .3% 5 3 .6% and 5 1 .2%;The absorption rate of phosphorus is 0.036μmol/g·h,0.030μmol/g·h and 0.033μmol/g·h,the re-moval ratio of phosphorusin is 65.2%,55.7% and 58.8%.Experimental results show that the three kinds of seaweed have typically absorbtion of nitrogen and phosphorus.Absorptive capacity order is Laminariajaponica Aresch >Gracilaria lemaneiformis>Sargassumthunbergii.
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