饲料淀粉水平对淡水黑鲷生长和消化酶活性的影响

配制5组等蛋白质等脂肪,不同淀粉水平(26%、30%、34%、38%、42%)的饲料,网箱养殖淡水黑鲷(Hephaestus fuliginosus)60 d,初始体重为(4.02±0.11)g,探讨其饲料中淀粉适宜添加量。结果表明,淀粉含量34%组相对增重率和蛋白质效率显著高于其它各组(P<0.05),饲料系数显著低于其它各组(P<0.05);各组间肠道胰蛋白酶和脂肪酶活性无显著差异(P>0.05),38%和42%组肠道淀粉酶活性显著高于26%和30%组(P<0.05);34%组全鱼以及肌肉的粗脂肪含量显著高于26%、30%和42%组(P<0.05),全鱼以及肌肉水分、粗蛋白和粗灰分含量各组间无显著差异(P>0.05);各组淡水黑鲷脏体比和肥满度无显著差异(P>0.05),42%组肝体比显著高于26%、30%和34%组(P<0.05);各组间成活率无显著差异(P>0.05)。综合实验结果分析,淡水黑鲷饲料中淀粉适宜添加量为34%~38%。

The effects of starch levels on growth performance and digestive enzyme activities of Hephaestus fuliginosus

To examine the effects of dietary starch on the growth performance and digestive encyze actirities of Hephaestus fuliginosus,diets containing iso-nitrogenous,iso-lipidic but increasing starch levels(26%,30%,34%,38% and 42%) were used to feed experimental fish for 60 days.At the end of the experiment,the Hephaestus fuliginosus fed 34% starch level showed higher relative weight and protein efficiency ratio,lower feed conversion ratio than other groups(P<0.05),higher level of crude lipid compositions of whole ...