包膜硫酸钠／过氧化氢／氯化钠加合物对尼罗罗非鱼养殖水体的改善效果  

Coated sodium sulphate-hydrogen peroxide-sodium chloride adduct improves the quality of tilapia Oreochromis niloticus culture water

作　　者：胡向东 陆甜[2] 夏枚生[2] 胡彩虹[2] 姚志通[2] 

机构地区：[1]浙江皇冠科技有限公司,杭州310012 [2]浙江大学饲料科学研究所,杭州310029

出　　处：《海洋水产研究》2008年第4期29-33,共5页Marine Fisheries Research

摘　　要：选取经食盐水浸浴10 d后平均体重为40 g左右的健康尼罗罗非鱼,随机分成两组,一组为对照组,另一组为试验组,每组设3个重复,每个重复30尾,饲养于水族箱中。试验组按3 g/m^3水的添加量投放包膜硫酸钠/过氧化氢/氯化钠加合物,每2 d投放1次,试验期20 d,试验期间不换水,24 h增氧,每天两次投饵,不捞残饵,研究包膜硫酸钠/过氧化氢/氯化钠加合物对尼罗罗非鱼养殖水体的改善效果。结果表明,(1)试验组和对照组水体的溶氧和pH值没有明显的差异;试验组和对照组氨氮、亚硝酸盐氮和COD浓度均随着试验时间的延长而升高,相同时间点试验组水体氨氮、亚硝酸盐氮和COD浓度均低于对照组,其中氨氮在第12、15和20天达到显著水平(P<0.05),亚硝酸盐氮和COD在第9、12、15和20天达到显著水平(P<0.05);(2)与对照组相比,试验组养殖水体细菌数量显著降低(P<0.05);(3)与对照组相比,试验组尼罗罗非鱼日增重、特定生长率和存活率分别提高40%(P<0.05)、40.9%(P<0.05)和14.2%(P<0.05),饵料系数降低12.3%(P<0.05)。Tilapia Oreochromis niloticus at an average body weight of about 40 g were maintained in saltwater for 10 d, before being divided randomly into two groups, as the control and the treatment group,respectively. Each group included three replicates with 30 tilapia cultured in one aquarium. Coated sodium sulphate-hydrogen peroxide-sodium chloride adduct was added to the water for the experimental group at a concentration of 3 g/m^3 once every two days. The experiment lasted 20 d, during which he culture water remained unchanged and aeration was provided for 24 h per day. Tilapia was fed twice daily without clearing off the remnants. Study was carried out on effects of coated sodium sulphate-hydrogen peroxide-sodium chloride adduct on culture water quality. It was found that： （1） DO and pH value of the water were not significantly different between the treatment and control group. Concentrations of NH4^＋-N, NO2^-N and COD in both groups rose with time. However,all these indexes in the treatment group were lower than those in the control at the same time. Significant differences between the two groups were found for NH4^＋-N（P〈0.05） on the 12^th,15^th,and 20^th days,and for NO2^-N and COD on the 9^th,12^th, 15^th and 20^th days. （2） Bacteria amount in the water of the treatment group decreased significantly, compared to that of the control group （P〈 0.05）. （3） Daily weight gain （DWG） ,specific growth rate （SGR） and survival rate （SR） of tilapia in the treatment group increased by40% （P〈0.05）,40.9%（P〈0.05） and 14.2%（P〈0.05）,respectively,while the feed conversation ration （FCR） reduced by 12.3%（P〈0. 05） ,compared to those in the control group.

关 键 词：硫酸钠/过氧化氢/氯化钠加合物 尼罗罗非鱼 水质 

分 类 号：S965.125[农业科学—水产养殖] X821[农业科学—水产科学]