降解氨氮的海洋酵母菌的筛选及其生物特性  

Selection of One Ammonia-degrading Oceanic Yeast and Studies on Its Biological Characteristic

作　　者：周鲜娇[1] 陈康振[1] 

机构地区：[1]湛江师范学院生命科学与技术学院,广东湛江524048

出　　处：《湛江师范学院学报》2007年第6期100-103,共4页Journal of Zhanjiang Normal College

基　　金：湛江师范学院科研基金(QL0604)

摘　　要：为筛选降解海水养殖水体氨氮的酵母菌,从海泥和海水中取样,得到能高效降解氨氮的海泥酵母 HN-2.研究了养殖水体中 C/N 比对 HN-2氨氮降解效果的影响,并对 HN-2生物特性进行研究.结果表明:C/N比约为4/1时,该 HN-2菌在16 h 内能使氨氮浓度为30 mg/L 的养殖水体中氨氮降解51.3%,24 h 时氨氮降解率为97.8%.而对照组16 h 内氨氮降解率为48.2%,16～24 h 内氨氮降解率基本无变化;其生物特性为:对数生长期为6～18 h,36 h 时菌量达到最大.最适生长 pH 值7.0、温度30℃、盐度(0～3)%.Through isolating and selecting yeasts in the sea water and mud,one yeast named HN-2 was got which could degrade ammonia effectively.The effects of C/N in the breed aquatics water on the ammo- nia degrading of HN-2 yeast and its biological characteristics were studied.The experimental results showed that:within 16 h,Yeast HN-2 could reach the 51.3 % degradation rate of ammonia in breed aquat- ics water containing 30 mg/L ammonia,and its degradation rate of ammonia was 97.8% within 24 h; whereas the contrast group could reach 48.2% degradation rate within 16 h and the degradation had no change between 16～24 h.Its biological characteristics were these:the logarithmic phase was 6～18 h,the most number yeast reached on 36 h,the best pH7.0,temperature 30℃ and salinity was(0～3)%.

关 键 词：海洋酵母 筛选 降解氨氮 生物特性 

分 类 号：S949[农业科学—水产养殖]