摘要
为了研究不同饵料投喂率对养殖罗非鱼生长效应、水质指标和微生物群落代谢多样性的影响,以(16±0.20)g的吉富罗非鱼(Oreochromis niloticus)为研究对象,探究不同饵料投喂率对罗非鱼生长以及水质指标的影响,同时,采用Biolog-ECO方法检测养殖水体中微生物对31种碳源的利用能力,研究不同饵料投喂率下的微生物代谢多样性的差异。研究结果表明,4%饵料投喂率下的罗非鱼饵料系数最低,饵料利用率较高,高投饵率对水质影响较大,不同饵料投喂率对养殖水体微生物代谢多样性有影响,4%饵料投喂率的Shannon指数较大,水体中的微生物种类较多;Pearson相关性分析表明,COD、TN、TP、NH3-N对水体微生物代谢β-甲基D-葡萄糖苷、葡萄糖-1-磷酸盐、甘氨酰-L-谷氨酸具有显著的正相关关系(P<0.05)。综合考虑,在罗非鱼养殖生产过程中,兼顾生态效益和经济效益,应该合理的进行饵料的投喂,初始大小为16 g左右的罗非鱼饵料投喂率为4%上下为宜。
To study the effects of different feeding rates on the growth,water physicochemical indexes and microbial community metabolic diversity of cultured tilapia,16±0.20 g Oreochromis niloticus was used as the research object,the effects of different feed rates on tilapia growth and water quality indicators were explored.Biolog-ECO method was used to detect the utilization of 31 carbon sources by microorganisms in culture water samples,to study the differences of microbial metabolic diversity under different feeding rates.The results showed that the tilapia with 4%feeding rate had the lowest feed coefficient and relatively high feed utilization rate;high feeding rate had a relatively great impact on water quality,and different feeding rates had an impact on microbial metabolic diversity in aquaculture water;the Shannon index of 4%feeding rate was relatively high,and there were more kinds of microorganisms in water;Pearson correlation analysis showed that COD,TN,TP,NH3-N had strong positive correlations(P<0.05)with water microbial metabolic diversity metabolism ofβ-methyl-D-glucoside,glucose-1-phosphate,glycyl-L-glutamic acid.In the process of tilapia culture,considering both ecological and economic benefits,we should feed the tilapia with proper feeding rates,the feeding rate with the initial tilapia size of about 16 g is around 4%.
作者
东新旭
范立民
宋超
郑尧
裘丽萍
孟顺龙
陈家长
Dong Xinxu;Fan Limin;Song Chao;Zheng Yao;Qiu Liping;Meng Shunlong;Chen Jiazhang(Wuxi Fisheries College of Nanjing Agriculural University,Wuxi Jiangsu 214081;Freshoater Fisheries Research Center of Chinese Academy of Fishery Sciences,Wuxi Jiangsu 214081)
出处
《中国农学通报》
2021年第27期146-154,共9页
Chinese Agricultural Science Bulletin
基金
财政部和农业农村部“国家现代农业产业技术体系”(CARS-46)。
关键词
不同饵料投喂率
罗非鱼
生长效应
水质指标
微生物群落代谢多样性
different feeding rates
tilapia
growth effect
water physicochemical indexes
microbial community metabolic diversity
