降解稻草对蓝藻生长的抑制作用

研究证明在有氧条件下经过一个月以上降解的稻草对铜绿微囊藻等4种实验室培养的蓝藻具有明显的生长抑制作用。然而，灭菌的降解稻草(121℃, 15min)并没有抑藻效果。这说明伴生微生物的降解作用对于稻草的抑藻因子的产生和释放是必要的。没有经过降解处理的干稻草没有抑藻效果。表明利用稻草控制自然水体水华发生是一个具有潜在实用价值的新途径。

Growth Inhibition of Cyanobacteria by Decomposed Rice Straw

The present experimental study has proved that the rice straw, decomposed in aerated water for more than one month, efficiently inhibit the growth of Microcystis aeruginosa and other three cyanobacterial species in laboratory condition. However, the sterilized decomposed rice straw(treated with a sterilizer at temperature 121℃ for 15min) has no such inhibition effect. This indicates that the microbes associated with the decomposing rice straw possibly play an important role in producing and releasing the algal inhibitors from the straw. Fresh rice straw, without decomposing treatment, exhibited no efficiency of algal inhibition. The present study has proved that the rice straw may have great potential of application to the algal blooming control.