光合细菌(Photosyntheic bacteria,PSB),是一种以光为能源,以二氧化碳(CO_2)或小分子有机物为碳源,以硫化氢(H_2S)、氨(NH_3)、亚硝酸盐(NO_2~-—N)等作为供氢体进行完全自养性或光能异常性生长,但不产生氧的一类微生物的总称,它们含有丰富的蛋白质(65%左右),维生素 B 族、类胡萝卜素及辅酶 Q 等,可改善水质,增强免疫功效,提高鱼、虾、蟹等水产品的品质和成活率。一、光合细菌在水产养殖中的应用1、改善水质高密度的集约化精养,大量的鱼类粪便、残饵和残留的鱼药,富营养化的水环境不仅滋生大量的病原微生物,而且它们腐败 Photosyntheic bacteria (PSB) is a kind of photosynthetic bacteria (PSB) that uses light as energy source, carbon dioxide (CO2) or small molecule organic carbon as carbon source, hydrogen sulfide (H2S), ammonia (NH3), nitrite N) as a hydrogen donor for autotrophic or abnormal growth of light energy, but does not produce oxygen in a group of microorganisms in general, they are rich in protein (about 65%), vitamin B family, carotenoids and coenzyme Q , Etc., to improve water quality, enhance immune function, improve the quality of fish, shrimp, crab and other aquatic products and survival rate. First, the photosynthetic bacteria in aquaculture applications 1, to improve the water intensive high-density intensive, a large number of fish feces, bait and residual fish drugs, eutrophic water environment not only breeds a large number of pathogenic microorganisms, and They are corrupt