关键词: 凡纳滨对虾, 育苗, 生物絮团, 碳源, Litopenaeus vannamei, larval rearing, biofloc, carbon source

Abstract: In order to improve the ecological level of Litopenaeus vannamei in the process of shrimp seedlings production, 50% bait amount of sucrose, glucose, starch was added to the prawn seedling water respectively as carbon source of the biofloc, bacillus licheniformis was also used. The whole experiment process was conducted in 1000 liters of water. Results indicate that carbon source adding group of floccules content was significantly higher than control group, and sucrose adding group of floccules formed earlier than starch and glucose group; Ammonia nitrogen and nitrite content was significantly lower than control and starch group s in sucrose and glucose adding group, and the nitrite peak concentrations decreased by 25.4% and 31.4%, respectively, compared with the control group and could automatically droped without changing water; Crude protein and crude fat content significantly higher than the control group in carbon source adding group, and sucrose adding group hadthe highest crude protein content, reached 32.6%; The body length of the larval shrimp (P14) of glucose and sucrose adding group increased significantly by 22.8% and 22.8% respectively (p<0.01). Thus, Sucrose and glucose is appropriate carbon source during biofloc technology larval rearing of L. vannamei.