食品科学 ›› 2013, Vol. 34 ›› Issue (1): 8-12.

• 基础研究 • 上一篇    下一篇

低分子质量壳聚糖对鲤鱼生长和消化酶活性的影响

任国锐1,李瑞金1,2,王 兰1,*   

  1. 1.山西大学生命科学学院 2.山西大学环境科学与工程研究中心
  • 收稿日期:2011-10-28 修回日期:2012-12-09 出版日期:2013-01-15 发布日期:2013-01-07
  • 通讯作者: 王兰 E-mail:lanwang@sxu.edu.cn
  • 基金资助:

    镉诱导金属硫蛋白在华溪蟹组织细胞中的定位与原核表达;壳聚糖作为绿色水产养殖饲料添加剂的研究和开发

Effect of Dietary Supplementation with Low Molecular Weight Chitosan on Growth and Digestive Enzyme Activities in Common Carp (Cyprinus carpio)

  • Received:2011-10-28 Revised:2012-12-09 Online:2013-01-15 Published:2013-01-07

摘要: 旨在探讨低分子质量壳聚糖(low molecular weight chitosan,LMWC)对鲤鱼(Cyprinus carpio)生长和消化酶活性的影响。采用单因子浓度梯度法,设基础饲料组和质量分数分别为0.25%、0.50%、0.75%、1.0% LMWC组;分别在30、45、60d对不同组鲤鱼质量增加率、投饵系数以及肝胰脏和肠道淀粉酶、脂肪酶、胰蛋白酶的活性进行动态分析。结果表明:随着LMWC添加量增加和时间延长,与对照组相比,鲤鱼质量增加率、淀粉酶、脂肪酶和胰蛋白酶活性都呈现逐渐升高的趋势,投饵系数呈现逐渐下降的趋势。在45、60d时0.75% LMWC组鲤鱼的质量增加率,淀粉酶、脂肪酶、胰蛋白酶活性相对于对照、0.25%、0.50%、1.0% LMWC组,升高趋势最为明显。1.0% LMWC组鲤鱼随着时间延长,质量增加率和消化酶(淀粉酶、脂肪酶、胰蛋白酶)活性的升高趋势逐渐变缓;饲料中添加不同质量分数的LMWC对鲤鱼消化酶活性的影响不同,0.75%为LMWC的最适添加量。

关键词: 鲤鱼, 质量增加率, 投饵系数, 淀粉酶, 脂肪酶, 胰蛋白酶, 低分子质量壳聚糖

Abstract: This study aimed to examine the effect of dietary supplementation with low molecular weight chitosan (LMWC) on common carp growth and digestive enzyme activities. Basal diet group was used as control and LMWC groups at increasing gradient concentrations (0.25%, 0.50%, 0.75% and 1.0%) were established. Body weight gain, feed coefficient and the activities of amylase, lipase and trypsin in the hepatopancreas and gut were analyzed after feeding for 30, 45 d and 60 d. When compared with control group, body weight gain and the activities of amylase, lipase and trypsin showed a gradual upward trend, whereas an opposite trend was observed for feed coefficient with increasing dietary LMWC supplementation and feeding time. After 45 d and 60 d of feeding, a more striking increase in body weight gain and the activities of amylase, lipase and trypsin was found for 0.75% LMWC group compared with control group and 0.25%, 0.50% and 1.0% LMWC groups. For 1.0% LMWC group, the increasing trend of body weight gain and digestive enzyme activities gradually slowed down with increasing feeding time. Dietary LMWC supplementation in different proportions had different effects on digestive enzyme activities in common carps and the optimal dosage was 0.75%.

Key words: Cyprinus carpio, body weight gain, feed coefficient, amylase, lipase, trypsin, low molecular weight chitosan

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