木聚糖酶和复合酶制剂PS对尼罗罗非鱼生长性能、非特异性免疫能力的影响

采用单因子浓度梯度法,以基础饲料为对照组,分别将木聚糖酶和复合酶制剂PS以0.05%、0.10%、0.15%的剂量添加到基础饲料中,饲养尼罗罗非鱼(初重32.65±4.16g),60d后测定鱼体的生长性能和非特异性免疫能力。结果表明:饲料中添加木聚糖酶、复合酶制剂PS能显著促进尼罗罗非鱼的生长;添加酶制剂实验组的超氧化物歧化酶活性、溶菌酶活力和抗活性氧能力均显著高于对照组(P<0.01),添加酶制剂能够提高尼罗罗非鱼的非特异性免疫能力。木聚糖酶或复合酶制剂PS在尼罗罗非鱼饲料中的的适宜添加量是0.1%。

The effects of xylanase and multi- enzyme PS on the production performance and the ability of non- specific immunity of Oreochromis niloticus

This study was conducted to evaluate the effect of xylanase and multi-enzyme PS on Oreochromis niloticus.Oreochromis niloticus(average initial weight 32.65±4.16g) were fed the basal diet supplemented with 0.05%,0.10%,0.15% xylanase and 0.05%,0.10%,0.15% multi-enzyme PS,respectively.The trial lasted 60 days.In conclusion,the addition of xylanase or multi-enzyme PS to the diet had significant positive effects on growth performance;the superoxide dismautase activity,lysozyme activity and the ability of resistance to active oxygen of the spleen and hepatopancreas of Oreochromis niloticus were all significantly higher than those of the control(P<0.01).It could improve the ability of the non-specific immunity of Oreochromis niloticus.Addition of 0.10% of xylanase or multi-enzyme to the diet might be sufficient for optimal performance of Oreochromis niloticus.