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3种沉水植物对水华藻类生长的影响   总被引:8,自引:0,他引:8       下载免费PDF全文
Effects of three submerged macrophytes, Potamogeton crispus, Myriophyllum sp. and Ceratophyllum demersum on the growth of bloom algae were investigated. The results of the coexistence assay indicated that, Potamogeton crispus, Myriophyllum sp. and Ceratophyllum demersum inhibited significantly excessive growth of bloom algae. Of the three submerged macrophytes, Potamogeton crispus and Myriophyllum sp. have the stronger inhibition on bloom algae; at the relatively higher concentrations (Potamogeton crispus, Myriophyllum sp. and Ceratophyllum demersum fresh weight 80,80 and 160 g/L), the aqueous extracts of fresh tissue of three submerged macrophytes can inhibit growth of bloom algae ; the growth of bloom algae was strongly inhibited by using dry powder; at the concentration of dry weight 20 g/L, the inhibitory effect by aqueous extracts of the dry powder of the three submerged macrophytes was beyond 50% ; the methanol extracts of the dry powder of three submerged macrophytes can inhibit growth of bloom algae at the relatively higher concentration.  相似文献
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通过取用美人蕉(Canna indica)种植根区水置于光照培养箱中对小球藻(Chlorella vulgaris)和卵形衣藻(Chamydom onas ovalis)进行培养和观察,获得两种藻类的生长数据。结果显示:根区水在6 d对小球藻的化感效应为-0.7331,对卵形衣藻则为-0.4408;小球藻试验组与对照组的细胞数量在2~6 d差异显著(P<0.05),而卵形衣藻的细胞数量在5~6 d出现显著差异(P<0.05)。显微镜观察还发现,试验组卵形衣藻部分细胞颜色变白、细胞器溶解,并出现胶群体,对照组没有发现这种现象。实验说明美人蕉根系能分泌一些化感物质影响藻类生长,化感物质对藻类的影响具有选择性。  相似文献
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向鲜重约10g的扦插黑藻顶枝端表面分别接种1.00、2.00和4.00g鲜重附植藻类,组成3个附植藻类一黑藻体系处理组,另设置未接种附植藻类的单一黑藻体系处理组,研究了各处理组种植水对水华鱼腥藻的化感作用。研究结果表明,附植藻类-黑藻体系和单一黑藻体系均对水华鱼腥藻产生了显著的化感抑制作用;附植藻类-黑藻体系抑制作用强于单一的黑藻体系;附植藻类接种量大的处理组。抑制作用较强,其中接种4.00g鲜重附植藻类的体系对水华鱼腥藻产生了极显著的化感抑制作用,叶绿素a去除率达97.65%。  相似文献
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