细基江蓠繁枝变种净化养殖废水投放密度的初步研究

Preliminary studies on density changes of Gracilarla tenuistipitata var.liui used for the purification of shrimp effluent

将细基江蓠繁枝变种(Gracilarla tenuistipitata var.liui)分成0,10,20,25,30,35 g·L^(-1)等6个密度组,在实验室条件下研究其24 h 之内对对虾养殖场排水沟废水营养盐 NH_4^+,NO_2^-,NO_3^-,PO_4^(3-)的吸收降解效果的差异。结果表明:细基江蓠繁枝变种各密度组对 NH_4^+和 PO_4^(3-)都有明显的降解效果(P<0.05)。通过比较得出最优密度组为30 g·L^(-1)对 NH_4^+和 PO_4^(3-)的相对降解率分别为69.69%和92.62%。

Under laboratory conditions, shrimp aquaculture effluent was treated with six densities of Gracilarla tenuistipitata var. liui （0, 10, 20, 25, 30 and 35 g·L^-1 ） respectively for comparing the efficiency of the degradation of NH4^＋,NO2^-,NO3^-,PO4^3- in 24 h. The obtained results showed that all of the five densities used had obvious positive effects on the degradation of NH4^＋ and PO4^3- （P 〈0. 05） . The optimal density of Gracilarla tenuistipitata var. liui for degradation was 30 g·L^-1 , which can result in 69.69% and 92. 62% of relative rates of degradation for NH4^＋ and PO4^3- , respectively.