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富营养化治理应放宽控氮、集中控磷 被引量:62

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摘要 传统上普遍认为,湖泊富营养化及蓝藻水华治理需要严格控制氮的排放.国际上最新研究否定了这一观点.文中首先通过分析指出传统控氮观念的科学基础并不可靠,其中氮磷比假说只是一种臆断,而封闭瓶营养添加实验未能模拟自然固氮过程.然后介绍在长江流域40多个湖泊多年比较研究的最新成果:无论总氮浓度是高还是低,总磷浓度都是限制浮游藻类生长的最重要因素,藻类总量决定于总磷而不是总氮,从而证明在野外条件下控氮不能减少藻类总量.研究结果得到北美长期全湖实验的证实.这两个研究点面结合,共同阐明了"减氮不能控制藻类总量、反而诱发固氮蓝藻水华"这一普适规律.从氮磷循环特点来看,这一结论也是必然的.进而从多方面论证指出:富营养化治理无需控氮、只需控磷,除非氮浓度过高对人类和生物造成直接毒害.最后提出了关于放宽或取消氮控制及湖泊富营养化治理的具体建议.
出处 《自然科学进展》 北大核心 2009年第6期599-604,共6页
基金 国家重大基础研究发展计划(编号:2008CB418006) 中国科学重大交叉项目(编号:KZCX1-YW-14-1) 重大方向性项目(编号:KZCX2-YW-426-02)资助
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