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环境化学  2015 

淀山湖浮游藻类增长的氮磷限制性营养研究

Keywords: 氨氮,硝氮,,浮游藻类,营养限制,淀山湖

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Abstract:

2009年1月至12月对淀山湖浮游藻类生物量及主要营养元素N、P含量进行了监测,并利用藻类增长的生物学评价(NEB)方法对浮游藻类增长的限制性营养元素进行了研究,采用双变量相关性分析了水体中N、P含量与浮游藻类生物量的相关性.结果表明,磷含量与藻类生物量有显著的正相关(Rmax=0.980),添加磷能明显促进藻类生物量的增加,且促进作用随磷浓度的增加而加强;在夏秋之际(7月-9月)蓝藻占优势藻类时,水体中的氮(氨氮)限制了蓝藻的增长,氨氮含量与藻类生物量呈现正相关(Rmax=0.691),硝氮对淀山湖藻类增长促进作用不明显,部分时间表现为抑制作用,磷与硝氮之间存在一定的交互作用.

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