耐盐红螺菌科细菌对淡水鱼池水质及细菌类群的影响

对耐盐红螺菌科光合细菌应用于淡水斑点叉尾Hui、彭泽卿养殖后，水化学环境因子、细菌类群及养殖生物的变化进行了研究。结果表明，鱼池泼施光合细菌后，水体NH4^ -N、NO2^--N、NO3^--N和COD下降，溶氧和pH上升；细菌类群及数量变化大致是：光合细菌提高3－50倍（多数在15－20倍）, 硝酸细菌提高3倍，硝酸细菌提高4－5倍；斑点叉尾Hui养殖池的主要异养细菌肠杆菌科细菌提高9．4％，气单胞菌属降低7．5％，彭泽鲫养殖池的主要异养细菌假单胞菌属降低16％，肠杆菌科提高21％；养殖生物的养殖效果是：斑点叉尾Hui鱼苗个体增重提高15．7％，彭泽卿苗个体增重提高12．8％。

The influence of salt-resistant Rhodospirillaceae bacteria on the water quality and bacterial population in the freshwater fish-ponds

The variation of chemical environmental factors in the water ecosystem, bacterial population and cultured organisms in the freshwater fishponds was studied after applying salt-resistant Rhodospirillaceae bacteria to culture Ictalurus punctatus and Pengze crucian . The results showed that the NH_4 +-N,NO_2 --N,NO_3 --N and COD content decreased and dissolved oxygen and pH increased in the water ecosystem after sprinkling Rho. capsulata in the fishponds. The change of bacterial population and quantity was as follow: The amount of photosynthetic bacteria, nitrous bacteria and nitric bacteria rose 3-50 (majority 15-20 times), 3 and 4-5 times respectively. The amount of major heterotrophic bacteriaEnterobacteriaceae rose 9.4% and Aeromonas reduced 7.5% in the Ictalurus punctatus fishponds;Pseudomonas reduced 16% and Enterobacteriaceae rose 21% in the Pengze crucian fishponds. The cultured effect of the cultured organism was that the average increasing rate of weight of every Icthlurus punctatus fry and Pengze crucian fry rose 15.7% and 12.8% respectively.