【摘要】 在实验室条件下,以伪鱼腥藻(Pseudanabaena sp.)为研究对象,研究了pH对伪鱼腥藻生长、叶绿素荧光参数(F_v/F_m、ETR、I_k)的影响,以期了解伪鱼腥藻对水体pH的适应及调节能力。试验分为2组,一组每天测定水体实际pH后调整藻液pH为初始设定值,另一组在试验开始时调节pH至设定值后不人为调节,每天测定pH。结果表明:伪鱼腥藻偏好碱性环境,并对水体pH有很强的调节和适应能力。每天调控pH为11的试验组生长情况最好;不人为调控pH试验中, pH 5—11试验组pH最终趋于10.9—11.5,人为调控pH试验中, pH 7—11试验组pH最终趋于9.5—11.3。pH为3和13条件下,伪鱼腥藻均不能生长。pH 5—11范围内, F_v/F_m、ETR随pH增大而增大, pH 7—11范围内各组I_k值差异不大。更多还原

【Abstract】 In order to understand the adaptation and adjustment ability of Pseudanabaena sp. to pH, the effects of different pH on the growth, chlorophyll fluorescence parameters(F_v/F_m, ETR, I_k) of Pseudanabaena sp. were investigated. The experiment was divided into 2 groups. One group adjusted the pH to initially determined value after measuring the actual pH of the water. Another group of experiments adjusted pH to set value and not adjusting artificially, and pH was measured daily. The results showed that the Pseudanabaena sp. preferred the alkaline environment and had a strong adjustment and adaptation to the water pH. The test group that regulated pH to 11 per day had a best growth condition. In the unartificially control pH test, the pH 5-11 test group’s pH tended to 10.9-11.5. In the artificially control pH test, the pH 7-11 test group’s pH tended to 9.5-11.3. Pseudanabaena sp. could not grow when pH was 3 and 13. F_v/F_m, ETR increased with pH increasing in the range of pH 5-11, and there was no significant difference in Ik within the range of pH 7 to 11.更多还原