耐高温植酸酶替代磷酸二氢钙对异育银鲫生长及机体成分的影响

摘要

研究了耐高温植酸酶替代磷酸二氢钙对异育银鲫生长性能、鱼体成分和机体磷含量的影响.对照组投喂不加植酸酶的基础日粮,试验1、2组在基础日粮基础上用1000 U/kg植酸酶分别替代基础日粮中0.3和0.6个百分点的磷酸二氢钙.结果表明:与对照组比较,试验1组鱼增重率提高了3.28％ (P＞0.05),试验2组异育银鲫的肥满度显著提高(P＜0.05),对肝体比和脏体比影响不显著(P＞0.05)；添加耐高温植酸酶使肌肉粗灰分含量显著降低(P＜0.05),但对粗蛋白质、粗脂肪和磷含量影响不显著(P＞0.05)；而试验1组血浆中磷的含量降低显著(P＜0.05).%The experiment was conducted to evaluate the effects of thermal stable phytase instead of calcium dihydrogen phosphate on growth performance,body composition and phosphorus content of Carassius auratus gibelio. The control group was fed with basal diet without phytase, and the two experimental group I , II were fed thermal stable phytase of 1 000 U/kg to replace calcium dihydrogen phosphate of 0. 3% and 0. 6%, respectively. The results showed that: compared with the control group, the weight gain rate of group I increased 3. 28 % (P> 0. 05), and the condition factor of group fj were increased significantly (P<0. 05) ,meanwhile, the apparent digestibilities of viscerasomatic index and hepaticsomatic index were not significantly different(P>0. 05);adding thermal stable phytase could not influence the crude protein, crude fat and phosphorus content (P>0. 05) ,but the content of muscle crude ash were decreased significantly(P<0. 05); phosphorus content in blood of group I was decreased significantly(P<0. 05).