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《Journal of Anhui Agricultural Sciences》 2008-17
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Toxicity Effects of Herbicide Atrazine on the Population Growth of Scenedesmus obliquus

LI Feng-chao et al(College of Life Science,Hebei University,Baoding,Hebei 071002)  
[Objective] The purpose was to evaluate the effect of herbicide atrazine on aquatic ecosystem.[Method] With the increment of atrazine population as index,the toxicity effects of atrazine under different mass concn.(0,0.01,0.03,0.05,0.07,0.09 mg/L) on the population growth of S.obliquus were studied.[Result] Atrazinea showed stronger toxicity effects on S.obliquus,with the EC50 value for 24,48,72 and 96 h being 0.040 6,0.030 0,0.022 1,0.021 1 mg/L resp.The repressive degree of the population growth of S.obliquus was positively related to the mass concn.of atrazine,displaying the obvious correlation of cencn.-dosage.When the mass concn.of atrazine was above 0.03 mg/L,the cells of S.obliquus were damaged,when that was above 0.07 mg/L,the growth of S.obliquus was almost completely inhibited and when that was higher than 0.09 mg/L the cell density of S.obliquus was negatively increased.[Conclusion] The toxicity effects of atrazinea on S.obliquus was more obvious and the repressive degree of the population growth of S.obliquus became stronger along with the increment of atrazine mass concn.
【Fund】: 保定市科技局项目(06F01-2);; 河北省科技指导计划项目(0627606);; 河北大学大学生科技创新基金项目(STCF)
【CateGory Index】: X592
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