月牙藻、四尾栅藻生长的氮营养动力学特征

文章通过分批培养试验比较研究了在水产养殖废水处理中的相对优势的藻种——月牙藻和四尾栅藻在磷浓度一定的前提下,对不同初始氮浓度生长的响应,并应用Monod方程计算了两种受试藻种对氮的生长动力学参数:最大比增殖速率(μmax)及半饱和常数(K)s。结果显示,月牙藻的最大比增殖速率为0.410 d-1,半饱和常数为0.297 mg/L;四尾栅藻的最大比增殖速率为0.328 d-1,半饱和常数为0.471 mg/L。据此可以预测,当磷浓度一定时,无论是在低氮还是高氮浓度下,月牙藻比四尾栅藻更容易形成优势藻。

Dynamic Study on the Effect of Nitrogen on the Growth of Selenastrum capricornutum and Scenedesm us quadricauda

This paper studied the effects of nitrogen on the growth of Selenastrum capricornutum and Scenedesm us quadricauda,which were used in the treatment of aquaculture wastewater,with bulk culture in the condition of constant phosphrus concentration,and calculated the maximum special growth rate(μmax) and semi-saturation constant(Ks) of them to nitrogen using the Monod Equation.The reasults show that the maximum special growth rate and the semi-saturation constant of Selenastrum capricornutum were 0.410 d-1 and 0.297 mg/L respectively;The maximum special growth rate and the semi-saturation constant of Scenedesm us quadricauda were 0.328 d-1 and 0.471 mg/L respectively.According to these dynamics constants,when the concentration of the phosphrus is constant,it can be expected that Selenastrum capricornutum will be dominant whenever introgen is scarce or abundant.