Effects of Photosynthetic Bacteria-enhanced Biological Floc Replacement Diets on Tilapia Growth,Water Environment and Water Microbial Diversity  

作　　者：Yuanyuan DONG Limin FAN Liping QIU Dandan LI Lu QIN Xinxu DONG Jiazhang CHEN 

机构地区：[1]Wuxi Fisheries College,Nanjing Agricultural University,Wuxi 214081,China [2]Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences/Fishery Ecological Environment Monitoring Center of the Lower Yangtze River,Ministry of Agriculture and Rural Affairs,Wuxi 214081

出　　处：《Agricultural Biotechnology》2020年第5期73-79,82,共8页农业生物技术（英文版）

基　　金：the Earmarked Fund for China Agriculture Research System(No.CARS-46)。

摘　　要：With Oreochromis niloticus as the object of study,glucose was added as a carbon source to promote the formation of the biological flocs for replacing part of the feed,and three gradients were set up,namely Group A(all feed),Group B(replacement of 10%feed)and Group C(replacement of 20%feed),so as to explore the effects of photosynthetic bacteria-enhanced biological flocs on tilapia growth and water environment conditions.Meanwhile,the Biolog-ECO technology was applied to study the changes of microbial carbon metabolism diversity in aquaculture water.The results showed that the utilization of microbial carbon sources under different feed replacement gradients increased with the extension of the culture time.The overall performance was in order of 10%replacement>all feed>20%feed replacement.A suitable replacement rate could not only enhance the overall utilization of carbon sources by water microorganisms,but also save culture costs.The principal component analysis showed that the carbon source metabolism of the water microbial communities under different feed replacement gradients was significantly different.Specifically,polysaccharides,esters and amino acids were the preferred carbon sources of water microbes,while the utilization of amines and acids was low.

关 键 词：Photosynthetic bacteria Biological floc Bait substitute Microbial community TILAPIA 

分 类 号：S965.125[农业科学—水产养殖]