【摘要】 2005年4月,在广东湛江港赤潮区采集球形棕囊藻(Phaeoecystisglobosa),在室内用新洁尔灭和异噻唑啉酮两种除藻剂进行棕囊藻的杀灭试验。结果表明,新洁尔灭对赤潮水体中球形棕囊藻的72hLC50为0.96mgL-1;与新洁尔灭相比,异噻唑啉酮的除藻效果更为明显,其对球形棕囊藻的72hLC50为0.54mgL-1。新洁尔灭和异噻唑啉酮复配时具有协同作用,可提高除藻能力,新洁尔灭和异噻唑啉酮浓度比为1.3:0.3(配比为4.3:1)时除藻效果最优,2d的除藻率达到89%,协同指数为0.78。两种除藻剂对鲻鱼(Mugilcephalus)苗72h的毒性试验表明,新洁尔灭和异噻唑啉酮浓度分别在2.0和0.3mgL-1以下除藻是安全的。更多还原

【Abstract】 Algicides, bromogeramine (B) and isothiazolone (I), were used for removing Phaeoecystis globosa in the experiments in containers of 450 ml seawater with 109 cells L-1 of algae collected in April 2005 from Zhanjiang Seaport, Guangdong Province, where red tide had happened in January 2004. The results showed that LC50 of isothiazolone was 0.54 mg L-1 for the algae treated for 72 hours, which was more effective than that ofbromogeramine (LC50=0.96 mg L-1). Alga-removal effects of both algicides used in combination showed synergistic action. The proportion of bromogeramine to isothiazolone being 4.3 to 1 gave best result. Toxicity tests on little fishes (Mugil cephalus) showed that 2.0 mg L-1 bromogeramine or 0.3 mg L-1 isothiazolone were safe for fishes in the removal of algae in 72 hours.更多还原