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微量元素铁对3种水华藻类生长的影响

Journal of Henan Normal University(Natural Science Edition)(2017)

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Abstract
在温度为25℃,光照强度为2500 lx,光暗比为14 h∶10 h的实验室条件下,研究微量元素铁对3种水华藻类(铜绿微囊藻、小球藻和小环藻)生长的影响.结果表明:当其他营养盐富足时,培养液中的微量元素铁对3种水华藻类的生长均有显著的影响.在培养中期,较高的铁浓度对细胞密度和叶绿素a质量浓度均有明显的促进作用;在培养20d后,当培养液中的铁浓度分别低至0.19~0.24、0.22~0.47和0.15~0.16 mg·L-1时,铜绿微囊藻、小球藻和小环藻细胞增殖缓慢.因此,有效调节微量元素铁的浓度也会影响到自然水体中藻类的生长.
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Key words
iron concentration,Microcystis aeruginosa,Chlorella vulgaris,Cyclotella sp.,cell density,chlorophyll-a content
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