饵料中添加胶红酵母对刺参性能的影响

Effects of dietary addition of Rhodotorula mucilaginosa on performance of Apostichopus japonicus

分别研究了饵料中添加不同水平的胶红酵母对刺参生长性能、免疫力和抗病能力的影响。胶红酵母的添加量分别为10~6、10~7和10~8 CFU/g。结果表明,饵料中添加不同浓度的胶红酵母能够显著提高刺参的特定生长率(P<0.05),其中,添加10~7 CFU/g胶红酵母效果最好,对比空白对照组,终末体质量和特定生长率分别提高了15.40%和35.09%;酚氧化酶、总一氧化氮合酶和碱性磷酸酶活性显著增加(P<0.05),分别较对照组提高了76.13%、49.17%和47.64%。但是饵料中添加不同浓度的胶红酵母对总体腔细胞数、超氧化物歧化酶、酸性磷酸酶和过氧化氢酶活性没有显著的影响。攻毒实验结果表明,对比未添加组,饵料中添加107 CFU/g胶红酵母能够减少刺参的累积死亡率55.59%。

The effects of dietary addition of Rhodotorula mucilaginosa on the growth performance, immunity and disease resistance of A. japonicus were investigated. The dietary addition of Rhodotorula mucilaginosa were 108 , 107 and 108 CFU/g, respectively. The result showed that dietary addition of Rhodotorula mucilaginosa could increase the specific growth rate of A. japonicus significantly （P〈0.05）. The group of 107 CFU/g showed better effects, of which the specific growth rate and terminal weight increased by 15.40% and 35.09%. Compared with the control group, the activity of phenoloxidase, total nitric oxide synthase and alkaline phosphatase increased by 76. 13%, 49.17 % and 47.64%, respectively （P〈0.05）. There were no significant effects on total coelomocyte counts, SOD activity, ACP activity and CAT activity of A. Japonicus. adding Rhodotorula mucilaginosa to diet at different levels. It was observed that the group of 107 CFU/g could significantly decrease the cumulative mortality of A. japonicus by 55.59%.