温度对几种大型海藻硝氮吸收及其生长的影响  

Effects of temperature on nitrogen uptake and growth in several species of macroalgae

作　　者：李恒[1,2] 李美真[1] 曹婧[3] 徐智广[1] 

机构地区：[1]山东省海水养殖研究所藻类中心实验室,青岛266002 [2]中国海洋大学化学化工学院,青岛266100 [3]国家海洋局北海环境监测中心,青岛266000

出　　处：《渔业科学进展》2013年第1期159-165,共7页Progress in Fishery Sciences

基　　金：国家海洋公益性行业科研专项经费项目(200905019-2;200905020-2;201105008-2);国家863项目(2012AA10A413;2012AA10A406-2)共同资助

摘　　要：以大型红藻真江蓠Gracilaria asiatica、脆江蓠Gracilaria chouae、蜈蚣藻Grateloupia filicina大型褐藻鼠尾藻Sargassum thunbergii、海黍子Sargassum pallidum为实验材料,研究了在10～25℃不同温度下这几种海藻对硝氮(NO3-N)的吸收和生长情况。结果表明,几种大型海藻对水体中NO3-N的吸收效果明显,其中真江蓠和脆江蓠的吸收速率15℃时最高,为0.507±0.136和0.448±0.095μmol/g·h,蜈蚣藻和鼠尾藻在20℃时最高,为0.614±0.033和0.289±0.019μmol/g·h,海黍子在25℃时吸收速率最高,为0.748±0.015μmol/g·h。结合去除效率常数来看,海黍子对NO3-N有更好的去除效果。温度变化对大型海藻的生长具有显著的影响,在20℃下大部分海藻相对生长速率达到最高,其中以脆江蓠最高,达到4.79%±0.45%/d。A series of experiments were conducted to investigate the effects of nutrient supplement on nitrogen uptake and growth of macroalgae,including Gracilaria asiatica,G.chouae,Grateloupia filicina,Sargassum thunbergii,and S.pallidum.It was found that nitrate absorption of these macroalgae was obvious within certain temperature range.With the rise of temperature,the nitrite uptake rate demonstrated an increasing trend.At 15℃,G.asiatica and G.chouae exhibited a maximal uptake rate of 0.507±0.136 μ mol/g.h and 0.448± 0.095 μ mol/g.h,respectively.At 20℃,G.filicinaand S.thunbergii exhibited a maximal uptake rate of 0.614±0.033 μ mol/g.h and 0.289±0.019 μ mol/g.h.At 25℃,S.pallidumexhibited a maximal uptake rate of 0.748 ±0.015 μ mol/g.h.These findings indicated thatS.pallidumis more efficient than the other species in removing nitrogen.Temperature had a significant impact on macroalgae growth,and at 20℃,the highest growth rate in wet weight occurred in most macroalgae,especially G.chouae,reaching 4.79±0.45%/d.

关 键 词：真江蓠 脆江蓠 蜈蚣藻 鼠尾藻 海黍子 吸收动力学 相对生长率 

分 类 号：S968.43[农业科学—水产养殖]