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大漂对几种常见水华蓝藻的抑制作用研究The Inhibitory Activities of Pistia Stratiotes L. on Three Cya-nobacteria Species
张胜花, 刘烨, 孙珮石
化感作用, 大漂, 铜绿微囊藻, 水华束丝藻, 水华鱼腥藻Allelopathy; Pistia Stratiotes L.; Microcystis Aeruginosa; Aphanizomenon Flosaquae; Anabaena Flosaquae
《Advances in Environmental Protection》, Vol.3 No.1B, 2013-07-04
以三种水华蓝藻为受试对象（铜绿微囊藻，水华束丝藻和水华鱼腥藻），采用共培养实验和种植水实验探讨大漂对三种水华蓝藻的抑制效果。实验结果表明，大漂对三种水华蓝藻具有较为显著的抑制作用。共培养时，大漂对铜绿微囊藻、水华束丝藻和水华鱼腥藻有明显的化感抑制效果，抑制效果从第三天开始显露，随着实验时间的延长不断增加，至第七天抑制率都超过90%。种植水实验结果显示，大漂种植水对铜绿微囊藻、水华束丝藻和水华鱼腥藻有一定的抑制效果，第六天抑制率分别达到72.3%，73.8%和86.5%。比较共培养实验和种植水实验中第六天藻类生长的抑制率，共培养时大漂对三种水华藻类的抑制率要明显大于种植水实验，原因可能是共培养中大漂持续的分泌化感物质，而种植水中的化感物质随着时间的推移有一定的降解。>Co-culture experiments and exudation experiments were designed to explore the allelopathic effects of Pistia stratiotes L. on three cyanobacteria species (Microcystis aeruginosa, Aphanizomenon flosaquae and Anabaena flosaquae). The results showed that P. stratiotes L. can inhibited the growth of these three cyanobacteria species. The inhibitory activities was appeared from the third day and became stronger till the 7th day, the inhibitory rate exceed 90% in co-cultured experiments at the end of experiments. After six days experiments, the growth of three cyanobacteria was inhibited by the exudation of 20 g/L P. stratiotes L., the inhibition rate reached 72.3% for M. aeruginosa, 73.8% for Ap. flosaquae and 86.5% for An. flosaquae. Comparing the algae growth inhibitory rate of co-culture experiment and exudation experiment, the algae inhibitory rate of co-culture system was higher than exudation treatment, which probably because the plant can secretes the chemical compounds continuously while the allelochemicals in exudation are degraded.