中文摘要：

为研究芽孢杆菌和光合细菌协同作用对刺参养殖水质及其生长、消化和免疫的影响，测定了水体化学需氧量（COD）、氨氮（NH4^＋-N）和亚硝酸盐氮（NO2^- -N）24h的变化量、肠道蛋白酶和淀粉酶的活性以及体腔液超氧化物歧化酶（SOD）、碱性磷酸酶（AKP）和溶菌酶（LSZ）的活力。结果显示，混合菌投喂组优于单一菌投喂组。在芽孢杆菌和光合细菌投喂浓度以1．86×10^5和1．75×10^4CFU／mL搭配时，该实验组协同作用效果最优，水体COD、NH4^ ＋ -N和NO2^＋ -N含量均显著低于对照组（P〈0．05）；刺参特定生长率最大（0．76％／d），较对照组提高56．8％，成活率亦最高（97．8％）；蛋白酶和淀粉酶活性最高（96．72和98．72U／mgprot），较对照组显著提高149％和44．82％；体腔液SOD活力最高（65．16U／mL）。而两种菌对刺参AKP和Lsz活力的影响较小。研究表明，芽孢杆菌和光合细菌搭配合理效果更佳，能够有效改善养殖环境，提高刺参消化酶’活性和免疫力，促进刺参生长。

英文摘要：

To determine the effects of Bacillus subtilis and photosynthetic bacteria （PSB） on aquaculture water and the growth, digestion and immunity of A. Japonicus, the related water quality, digestive enzymes and immune parameters were measured. The results showed that the concentration of COD, ammonia-N and NO2 - - N of the experiment group that introduced 1.86 x 105 CFU/mL Bacillus sp. and 1.75 x 10^4 CFU/mL PSB, were significantly lower than the of the control group （ P 〈 0.05 ）. At the end of the whole experiment, the survival and specific growth rates of A. Japonicus in this group were 97.8% and 0.76%/d, and both of the two parameters was the highest among all the groups; the activities of protease and amylase were significantly higher than those of the control groups （P 〈 0.05）, increased respectively by 149% and 44.82%. Our study showed that the bacteria at a suitable concentration can greatly enhance the immunity of A. Japonicus and improve aquaculture water, however the activities of alkaline phosphatase and lysozyme in all groups were not significant （ P 〉 O. 05 ）.