关键词：
氧化魔芋葡甘露聚糖;齐口裂腹鱼;生长;血脂;脂肪代谢酶
摘 要：
目的:研究日粮氧化魔芋葡甘露聚糖(oxidized konjac glucomannan,OKGM)对齐口裂腹鱼生长、血脂以及脂肪代谢酶活性的影响。方法:选用初始体质量为(79.54±8.12)g的齐口裂腹鱼300尾,随机分成5组,每组3个重复,每重复20尾鱼,分别饲喂OKGM添加量为0(对照组D1)、4、8、16、32 g/kg,养殖60 d后,考察OKGM对齐口裂腹鱼生长性能、血脂水平及脂肪代谢酶活性的影响。结果:与对照组D1相比,日粮添加8~16 g/kg OKGM可显著提高鱼体增重率(P<0.05)、特定生长率(P<0.05),添加16 g/kg OKGM能够显著提高蛋白质效率(P<0.05),降低饵料系数(P<0.05),会显著降低肌肉水分含量(P<0.05),添加8 g/kg OKGM可显著降低肌肉和肝胰脏脂肪含量(P<0.05),添加4~16 g/kg OKGM能够显著提高鱼体肠脂比(P<0.05);在血脂方面,日粮中OKGM添加量对齐口裂腹鱼总胆固醇、甘油三酯、高密度脂蛋白、低密度脂蛋白没有明显的剂量效应,添加4~8 g/kg OKGM能够显著降低血清中游离脂肪酸含量(P<0.05);在脂肪代谢酶方面,添加16 g/kg OKGM显著提高脂蛋白酯酶、肝脂酶和总脂酶活性(P<0.05),在肠道消化酶方面,添加8~32 g/kg OKGM能显著提高齐口裂腹鱼肠道脂肪酶活性(P<0.05)。结论:日粮中添加适量OKGM能改善齐口裂腹鱼生长性能,提高饲料利用率,降低肌肉脂肪含量,提高脂肪代谢酶和脂肪酶活性。建议齐口裂腹鱼饲料中OKGM添加量为4~16 g/kg。
译 名：
Effect of Dietary Oxidized Konjac Glucomannan on Growth Performance, Blood Lipid and Lipid Metabolism Enzymes Activities in Schizothorax prenanti Tchang
作 者：
ZHOU Cheng;WU Ying-long;XIA Xiao-jie;TANG Miao;LIAO Jie;College of Food Science,Sichuan Agricultural University;
关键词：
oxidized konjac glucomannan;;Schizothorax prenanti Tchang;;growth;;blood lipid;;lipid metabolism enzyme activity
摘 要：
Objective: To study the effect of dietary oxidized konjac glucomannan(OKGM) on growth performance, blood lipid and lipid metabolism enzyme activities in Schizothorax prenanti Tchang(SPT). Methods: Three hundred SPT with initial body weigh of(79.54 ? 8.12) g were randomly divided into 5 groups with 3 replicates of 20 fish in each group. The feed for control group(D1) was free of OKGM, and that for treatment groups contained 4, 8, 16 and 32 g/kg OKGM, respectively. The experiment lasted for 60 days. Results: Compared with the control group, body weight gain rate and specific growth rate were significantly improved by adding 8 g/kg and 16 g/kg OKGM in the SPT diet(P < 0.05). Addition of 16 g/kg OKGM in the SPT diet could significantly increase protein efficiency ratio, and reduce feed conversion ratio and muscle moisture(P < 0.05). Meanwhile, addition of 8 g/kg OKGM resulted in a significant reduction in the fat content in muscle and hepatopancreas(P < 0.05). In addition, addition of 4–16 g/kg OKGM in the SPT diet significantly enhanced intraperitoneal fat ratio(P < 0.05). Moreover, addition of OKGM in the SPT diet affected the contents of total cholesterol, triglyceride, high-density lipoprotein cholesterol and low-density lipoprotein cholesterol in serum without any dose-response relationship. OKGM addition at a dose of 4–8 g/kg in the SPT diet could significantly decrease the content of free fatty acids. Furthermore, the activities of lipoprotein lipase, hepatic lipase and total lipase were significantly increased by adding 16 g/kg OKGM(P < 0.05). On the other hand, the activity of intestinal lipase was significantly improved due to addition of OKGM at a dose of 8–32 g/kg(P < 0.05). Conclusion: Feed containing appropriate amounts of OKGM can improve the growth performance of SPT, increase the feed conversion ratio, decrease muscle fat content, and improve the activities of lipid metabolism enzymes and lipase. Meanwhile, OKGM at a dose of 4–16 g/kg is the optimal concentration in SPT feed.
