温度和营养盐胁迫对龙须菜氨氮吸收速率及生长速率的影响  

Effects of Stress of Temperature and Nutrients on Ammonia Nitrogen Uptake Rate and Growth Rate of Gracilaria lemaneiformis

作　　者：赵建刚[1] 叶长鹏[1] 

机构地区：[1]暨南大学水生生物研究所,广东广州510632

出　　处：《水生态学杂志》2011年第6期57-60,共4页Journal of Hydroecology

基　　金：国家自然科学基金(31000240);农业部渔业生态环境重点开放实验室课题(2005-10);广东高校优秀青年创新人才培育项目(LYM08020);暨南大学人科研培育与创新基金(21609411;21611428)

摘　　要：以龙须菜(Gracilaria lemaneiformis)为试验材料,分别研究了温度和营养盐协迫对其生长及氨氮吸收速率的影响。结果表明,2个环境因子对龙须菜生长和吸收氨氮速率均有显著影响。龙须菜在20℃条件下生长较其在10℃和30℃条件下生长快速(P<0.01);营养盐含量过高和过低均不利于龙须菜的生长;营养盐水平越高,龙须菜吸收氨氮的速率越高(P<0.05),但随着试验时间的延长,则呈现出氨氮吸收速率减小的趋势。鉴于龙须菜对氨氮的高吸收能力,可考虑将其作为富营养化海域的生物修复材料。The combined effects of temperature and nutrient levels on the uptake of NH＋4-N and the growth rate of Gracilaria lemaneiformis were studied indoors. The results showed that both of the two environmental factors had significant effects on the uptake rate of NH＋4-N and growth rate of G. lemaneiformis. The G.lemaneiformis growth was rapider at the temperature of 20℃ than that at both 10℃ and 30℃ （P0.01）, and furthermore, excessively high and low nutrient levels were not conductive to the growth of G. lemaneiformis. The uptake of NH＋4-N was positively related to the nutrients levels （P0.05）, while the uptake of NH＋4-N of G.lemaneiformis exhibited a decreasing trend with the culture time extending. Considering its high capacity of absorbing nitrogen, G.lemaneiformis can be employed as potential bioremediation tools in eutrophication zones.

关 键 词：龙须菜 温度 营养盐 氨氮吸收速率 生长速率 

分 类 号：Q948.11[生物学—植物学]