农业环境科学学报2017，Vol.36Issue(8)：1618-1626,9.DOI:10.11654/jaes.2017-0107
组合填料对水质、罗非鱼生长及水体微生物群落功能多样性的影响
Effects of combined fillers on the water quality, growth of tilapia, and functional diversity of the microbial community in tilapia aquaculture water
摘要
Abstract
Combined fillers were used as attachment carriers for indigenous microorganisms to study their effects on the water quality, growth of tilapia, and functional diversity of the microbial community in tilapia aquaculture water. The results showed that the combined fillers af-fected the water quality by increasing the concentrations of nitrite, dissolved oxygen, and inorganic carbon and by decreasing the concentra-tion of nitrate and pH values in these aquaculture systems. At the same time, the concentrations of ammonia nitrogen and total organic car-bon in these systems presented falling trends. In addition, the combined fillers significantly increased weight gain in the tilapia and reduced the feed coefficients. Moreover, with the suspension density increasing, the feed coefficients decreased. The combined fillers reduced the number of bacterial strains, but it had no significant effect on the alpha diversity of microorganisms presented via the Shannon, Simpson, McIntosh, and richness indices for these aquaculture systems. Nevertheless, the combined fillers improved the utilization rate of carbohy- drates, alcohols, and esters by microorganisms, and reduced these substances to amines and acids in the process. Furtherly, RDA analysis not only showed the differences in functional diversity of the microbial community between the treated group and the control group in these systems, but also showed that the variations in functional diversity of the microbial community were more related to the changes of DO, pH, and nitrate. To summarize, the combined fillers could reduce the number of bacterial strains and affect the functional diversity of the micro-bial community. In addition, they could effectively improve the water quality and promote the growth of tilapia.关键词
组合填料/罗非鱼/净化效果/微生物群落/碳代谢特征Key words
combined filler/tilapia/purification effect/microbial community/carbon metabolism分类
资源环境引用本文复制引用
史磊磊,范立民,陈家长,邴旭文,赵志祥,胡庚东,吴伟..组合填料对水质、罗非鱼生长及水体微生物群落功能多样性的影响[J].农业环境科学学报,2017,36(8):1618-1626,9.基金项目
国家科技支撑计划项目(2015BAD13B03) Project supported:The National Key Technology Research and Development Program of the Ministry of Science and Technology of China(2015BAD13B03) （2015BAD13B03）
