3种微生物制剂调控工厂化对虾养殖水质的研究

研究了地衣芽孢杆菌(Bacillus licheniformis,BL)、荚膜红假单胞菌(Rhodopseudomonas capsulate,RC)和乳酸杆菌(Lactobacillusspp.,LB)对凡纳滨对虾(Litopenaeus vannamei)工厂化养殖水质的影响。结果表明,施用不同微生物制剂组合,其作用效果各不相同。各组微生物制剂均能降低水体中氨氮,地衣芽孢杆菌 荚膜红假单胞菌(G1)组、地衣芽孢杆菌 荚膜红假单胞菌(G2)和地衣芽孢杆菌 乳酸杆菌(G3)组NH4 的相对降解率为62%、63%和65%;前21d,G2组降低NH4 效果最明显,相对降解率为79%。在降低NO2-方面,G1组的效果较好,相对降解率为46%;但各处理组对于PO34-、COD均无显著效果。相对而言,G1组改善养殖水质的效果最好。实验中微生物制剂的不同施用频率对水质的净化没有明显的差别。各项水质指标均随养殖时间的推移呈现不断上升的趋势。

Application of three microbiological preparations to control of water quality in industrialized shrimp culture

The experiment was conducted to determine the supplement of microbiological preparations [Bacillus licheniformis(BL),Rhodopseudomonas capsulate(RC),Lactobacillus spp.(LB)] on ammonia-N,nitrite-N,nitrate-N,chemical oxygen demand and active phosphate in industrialized shrimp culture.The experiments was composed of two teams and every team had two frequencies:control group,BL RC added once per 7 days(G1),BL RC added once per 3 days(G2),LB BL added once per 7 days(G3)and LB BL added once per 3 days(G4).The results showed that different microbiological preparations had different preponderance.At the aspect of reducing NH 4,compared with control group,G1,G2 and G3 reduced 62%,63% and 65%,respectively.In the first 21 days,G2 reduced 79% compared with control group.As for NO-2,compared with comparison,G1 reduced 46%.The best effect for controlling water quality was group G1.In addition,no groups resulted in significantly reduced PO3-4and COD.There is no striking difference between two frequencies in controlling the water quality.With the culture time increasing each index trended to increase.