细基江蓠繁枝变种净化养殖废水投放密度研究

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

摘要: 将细基江蓠繁枝变种（Gracilarla tenuistipitata var liui）分成0，10，20，25，30，35 gL-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NH4+，NO2-，NO3-，PO43-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NH4+和PO43-都有明显的降解效果（P＜0.05）。通过比较得出最优密度组为30gL-1，对NH4+和PO43-的相对降解率分别为69.69%和92.62%。

Abstract: Under laboratory conditions, shrimp aquaculture effluent was treated with six densities of Gracilarla tenuistipitata var. liui (0，10，20，25，30 and 35 gL-1） respectively for comparing the efficiency of the degradation of NH4+，NO2-，NO3-，PO43- in 24 h. The obtained results showed that all of the five densities used had obvious positive effects on the degradation of NH4+ and PO43-（P0.05）. The optimal density of Gracilarla tenuistipitata var.liui for degradation was 30 gL-1, which can result in 69.69% and 92.62% of relative rates of degradation for NH4+ and PO43-，respectively.