流速对太湖铜绿微囊藻生长的影响

Effects of Flow Velocity on Growth of Microcystis aeruginosa in Taihu Lake

摘要: 通过室内模拟试验研究了不同流速条件对太湖水中铜绿微囊藻生长的影响。结果表明:在温度为25℃、光照度为3 300 lx、光暗比为10 h∶14 h的条件下,流速在0~75 cm.s^-1范围内,适合藻类生长的最佳流速条件为u=30 cm.s^-1,当流速u<30 cm.s^-1或u>30 cm.s^-1时,藻类生长均受到不同程度的影响。尤其当流速u≥50 cm.s^-1时,藻类生长受到明显限制,数量无明显增加。

Abstract: Effects of flow velocity on growth of Microcystis aeruginosa incubated in water from the Taihu Lake were studied in laboratory.Results show that when the experimental conditions were set as 25 ℃ in temperature,3 300 lx in light intensity and 10 h/14 h in light cycle,the alga grew best with the flow velocity being 30 cm·s^-1.If the flow velocity rose or fell,growth of the alga was affected to a varying extent,and to a significant extent when the flow velocity reached to or beyond 50 cm·s^-1.