非淀粉多糖酶对奥尼罗非鱼生长及水质的影响

Effect of Non-Starch Polysaccharide Enzyme on Growth Performance of Tilapia and Water Quality

选用体重约60 g的奥尼罗非鱼560尾,随机分成4个试验组,每组7个重复,每重复20尾,分别添加不同梯度水平的液体酶制剂(0、0.01%、0.02%、0.04%)。试验结果表明:奥尼罗非鱼饵料中添加非淀粉多糖酶对罗非鱼的特定生长率、饵料系数等均有显著影响(P<0.05),0.02%组和0.04%组的特定生长率比对照组分别提高10.61%和11.36%,0.02%组和0.04%组的饵料系数比对照组分别降低16.13%和18.99%;罗非鱼饵料中添加非淀粉多糖酶显著降低了水中氨氮含量,提高了水中溶氧量。

A feeding trial was conducted to study the effect of Non-Starch Polysaccharide （NSP） enzyme on growth performance and nutrient digestibility of hybrid tilapia Oreochromis niloticus x O. aureus. 560 fish were randomly allotted to four groups containing 7 replicates and fed rations with NSP-enzyme of grade levels （0, 0.01%, 0.02%, and 0.04% ）. The results showed that： Supplement of NSP-enzyme in the hybrid tilapia diet had signifi- cant effect on specific growth rate （SGR） and feed conversion rate （FCR） （ P 〈0.05）. The fish fed the diets supplemented with 0.02% and 0.04% of NSP-enzyme had 10.61% and 11.36% higher in SGR and 16.13% and 18.99% lower in FCR than the fish in control group, respectively. The NSP-enzyme supplementating in the diets can decline the NH3-NH4^＋ levels and increase the dissolved oxygen levels in the ponds.