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试验旨在研究黄霉素、抗菌肽、喹烯酮和喹乙醇等4种促生长剂对罗非鱼生长性能的影响。选用800尾体重为(10.3±1.4)g的健康罗非鱼鱼种分为4个处理,每个处理5个重复,每个重复40尾。不同处理组基础饲料一致,饲料中分别添加10 mg/kg黄霉素、50 mg/kg喹乙醇、50 mg/kg喹烯酮和100 mg/kg抗菌肽(天蚕素),试验期为42 d。结果表明:试验全期不同处理组罗非鱼成活率都达到100%,饵料系数、特定生长率和肥满度均无显著差异(P>0.05)。试验前5周不同处理组罗非鱼增重无显著差异(P>0.05),第6周抗菌肽组增重显著高于喹乙醇组和喹烯酮组(P<0.05),全期增重抗菌肽组极显著高于喹烯酮组(P<0.01),显著高于喹乙醇组(P<0.05),黄霉素组的增重显著高于喹烯酮组(P<0.05),喹烯酮组和喹乙醇组无显著差异(P>0.05),黄霉素组和抗菌肽组无显著差异(P>0.05)。试验证明,抗菌肽和黄霉素在促进罗非鱼生长方面优于喹乙醇和喹烯酮。
The experiment aimed to study the effects of four kinds of growth promoters, such as flavomycin, antibacterial peptide, quinocetone and olaquindox, on the growth performance of tilapia. Eighty healthy Tilapia species with body weight of (10.3 ± 1.4) g were selected and divided into four treatments, each dealing with five replicates of 40 tails each. The basal feed was the same in different treatment groups. The feed was supplemented with 10 mg / kg flavomycin, 50 mg / kg olaquindox, 50 mg / kg Quinocetone and 100 mg / kg antimicrobial peptide (Cecropin) for 42 days. The results showed that the survival rates of tilapia reached 100% in all treatment groups, and there was no significant difference in food efficiency, specific growth rate and fatness (P> 0.05). At the 6th week, the weight gain of antibacterial peptide group was significantly higher than that of olaquindox group and Quinocetone group (P <0.05). The total weight gain of antibacterial peptide (P <0.01), significantly higher than that of olaquindox group (P <0.05), the weight gain of the flavomycin group was significantly higher than that of the Quinocetone group (P <0.05), and the Quinocetone group and olaquindox group (P> 0.05). There was no significant difference between the flavomycin group and the antibacterial peptide group (P> 0.05). Experiments show that antimicrobial peptides and flavomycin in promoting the growth of tilapia is better than olaquindox and Quinocetone.