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选用1 80尾体质量相近、健康的成鲤作饲养试验,随机分成4组,设对照组1个,试验组3个(日粮中分别添加0 .3 %、0 .6 %、1 .0 %的小肽)。试验结束后,观察在基础日粮中添加不同量的小肽对成鲤血液生理生化指标及脏体器官的影响,以探讨小肽对鲤鱼免疫力的影响。结果表明,1 )试验组成鲤血清中的免疫球蛋白(IgM)和补体(C4)的浓度均高于对照组(P <0 .0 5) ,其中1 .0 %小肽组的IgM和C4分别为450 .81mg/L和1 7.69mg/L ,比对照组提高1 4 .6 %和95 .7%,补体(C3 )差异不显著(P >0 .0 5) ;尿素氮(BUN)含量比对照组低(P <0 .0 5) ,尤其是1 .0 %小肽组比对照组降低2 7.9%;2 )试验组成鲤的内脏比、肝体比和脾体比均比对照组提高,但差异不显著(P >0 .0 5) ,随着饵料中小肽用量的增加肾体比也逐渐提高,1 .0 %小肽组的肾体比比对照组提高56.3 %(P <0 .0 5)。
The experiment was conducted in a feeding experiment of Cheng carp with similar body weight and similar body weight. The rabbits were randomly divided into four groups, one in the control group and three in the experimental group (fed with 0.3%, 0.6%, 1.0 % Of the small peptide). After the experiment, we observed the effects of adding different amount of small peptides to the blood physiological and biochemical indexes and visceral organs in the basal diet to investigate the effect of small peptides on carp immunity. The results showed that 1) the concentration of immunoglobulin (IgM) and complement (C4) in the serum of the experimental carp was higher than that of the control group (P <0.05), of which the IgM and C4 Respectively, which were 450.81mg / L and 7.69mg / L, respectively, which were 14.6% and 95.7% higher than that of the control group respectively. There was no significant difference in complement (C3) between the two groups (P> 0.05) (P <0.05), especially in 1.0% of the small peptide group decreased by 2 7.9% compared with the control group; 2) The visceral ratio, liver body ratio and spleen ratio in the test carp were all lower than those in the control group (P> 0.05). With the increase of the amount of small peptides in the diet, the ratio of kidney to body increased gradually. In the group of 0.1% of small peptides, the number of kidneys increased by 56.3% compared with the control group (P < 0 .0 5).