Fe、Mn、Zn对湖泊藻华暴发影响规律研究.pdf

Fe 、Mn 、Zn 对湖泊藻华暴发影 响规律研 究 1 2 2 陈仕光 　王志红 　曹 　欣 ( 1 仲恺农业工程学院城市建设学院 ,广州 　510225 ; 2 广东工业大学土木与交通工程学院 ,广州 　5 10006) 　　摘要 　通过设计正交组合试验 ,研究3 种典型金属元素 Fe 、Mn 、Zn ,结合代表性常量元素 P ,考查对 淡水藻类生长的影响。结果表明:当 P 为 0 . 04～0 . 32 mg/ L 时 ,藻生物产量随着 P 的增加而增加 。当 Fe 0 . 05 mg/ L 时 ,促进藻类生长 ; Fe 0 . 1 mg/ L 时 ,抑制藻类生长 。Zn 0 . 01 mg/ L 时促进藻类生 长 ,Zn 0 . 04 mg/ L 时 ,抑制藻类生长 。Mn 本身没有表现出规律性影响趋势 ,但与微量元素之间的竞 争性抑制有密切关系 。藻生长速率分别在 P 0 . 16 mg/ L ,Fe 0 . 05 mg/ L ,Mn 0 . 05 mg/ L ,Zn 0 . 01 mg/ L 时最大 ,藻生物产量分别在 P 0 . 32 mg/ L ,Fe 0 . 1 mg/ L ,Mn 0 . 05 mg/ L ,Zn 0 . 01 mg/ L 时最高 。四种物 质对藻生长速率影响的显著顺序依次为 :Zn P Fe Mn 。 关键词 　金属元素 　藻华 　生物量 　影响规律 Study of eff ects of Fe , Mn and Zn on the eruption of algae blooming in lakes Chen Shiguang1 , Wang Zhihon g2 , Cao Xin2 ( 1 . Col leg e of Urban Cons t r uct ion , Z hong k ai Uni v ers i ty of A g ricul t u re an d E ng i neeri ng , Guang z hou 510225 , Ch i na; 2 . S chool of Ci v i l an d T ransp ort at ion E ng i nee ri ng , Guang d ong ) Uni ve rs i ty of Tech nol og y , Gu ang z hou 5 10006 , Chi na Abstract : Ort hogonal exp eriment s were designed to measure t he effect s of t hree typical trace element s ( Fe , Mn and Zn) as well as rep resentative normal nutrition (p ho sp horous) on algae growt h . The result s showed t hat algae biomass increased wit h t he increase of t he concentration of P between 0 . 04 and 0 . 32 mg/ L . Algae growt h rate was p romoted at t he concentration of Fe below 0 . 05 mg/ L , while was inhibited at t he concentration above 0 . 1 mg/ L . A s to Zn t here was a simil