Fe、Mn、Zn对湖泊藻华暴发影响规律研究
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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510006)
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0.04～0.32mg/L时,藻生物产量随着P的增加而增加。当
Fe0.05mg/L时,促进藻类生长;Fe0.1mg/L时,抑制藻类生长。Zn0.01mg/L时促进藻类生
长,Zn0.04mg/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P0.16mg/L,Fe0.05mg/L,Mn0.05mg/L,Zn0.01mg/L
时最大,藻生物产量分别在P0.32mg/L,Fe0.1mg/L,Mn0.05mg/L,Zn0.01mg/L时最高。四种物
质对藻生长速率影响的显著顺序依次为:ZnPFeMn。
关键词金属元素藻华生物量影响规律
StudyofeffectsofFe,MnandZnontheeruptionofalgaebloominginlakes
ChenShiguang1,WangZhihong2,CaoXin2
(1.CollegeofUrbanConstruction,ZhongkaiUniversityofAgricultureandEngineering,
Guangzhou510225,China;2.SchoolofCivilandTransportationEngineering,Guangdong
)
UniversityofTechnology,Guangzhou510006,China
Abstract:Orthogonalexperimentsweredesignedtomeasuretheeffectsofthreetypicaltraceelements
(Fe,MnandZn)aswellasrepresentativenormalnutrition(phosphorous)onalgaegrowth.Theresults
showedthatalgaebiomassincreasedwiththeincreaseoftheconcentrationofPbetween0.04and
0.32mg/L.AlgaegrowthratewaspromotedattheconcentrationofFebelow0.05mg/L,whilewas
inhibitedattheconcentrationabove0.1mg/L.AstoZntherewasas