稻秆对铜绿微囊藻抑制作用的研究
Study on inhibitory effects of rice straw on Microcystis aeruginosa growth
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摘要: 研究了稻秆浸出液对铜绿微囊藻生长的抑制作用。研究表明，稻秆浸出液中含有的化学物质抑制了铜绿微囊藻的生长繁殖。稻秆浸泡时间的延长，有利于提高浸出液的抑藻效果，但浸泡时间过长则无益于抑藻效果提高，浸泡时间为15 d时，抑制率能高达75.99%。稻秆浸出液投加量达7.5%以上具有显著的抑藻效果。不同部位的水稻秸秆浸出液对铜绿微囊藻生长的抑制作用有差异，抑制效果是稻根浸出液＞稻穗浸出液＞稻秆浸出液。稻秆浸出液不仅阻碍了藻细胞生长、合成新的叶绿素，而且会破坏原有藻细胞的叶绿素。Abstract: Inhibitory effects of rice straw extracts on the growth of Microcystis aeruginosa were studied. The results showed that the chemical substances in straw extracts inhibited the growth and reproduction of Microcystis aeruginosa. The inhibitory effects were enhanced by the increasing soaking time; however extensive soaking time was not able to further increase the effect. The inhibition rate reached 75.99% by the rice straw extracts obtained with 15 day soaking time. Significant inhibitory effects were observed with the dose of the rice straw extracts over 7.5%. The extracts from different parts of rice straw had different inhibitory effects on Microcystis aeruginosa. The inhibitory effects of the extracts decreased in the order of rice root,rice head and rice straw. Rice straw extracts hampered the growth of algal cells and the further synthesis of chlorophyll, and destroyed the chlorophyll originally in the algal cells.
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Key words:
- rice straw /
- Microcystis aeruginosa /
- algal-inhibition
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