摘要
本试验旨在研究植物甾醇对吉富罗非鱼生长性能、血清脂质代谢指标和肝胰脏抗氧化指标的影响。选取体质量为(39.25±1.56)g的吉富罗非鱼360尾,随机分成4组(每组3个重复,每个重复30尾),分别投喂在基础饲料中添加0(L1组,作为对照组)、20(L2组)、40(L3组)和160 mg/kg(L4组)植物甾醇的试验饲料,进行为期60 d的饲养试验。结果显示:1)与L1组相比,L2、L3组罗非鱼的增重率和特定生长率显著提高(P<0.05),L2、L3、L4组罗非鱼的饲料系数均显著降低(P<0.05),其中L2组效果最佳。2)饲料中添加不同水平植物甾醇均可显著提高罗非鱼肌肉粗灰分含量(P<0.05),但对肌肉水分、粗蛋白质和粗脂肪含量没有显著影响(P>0.05)。3)与L1组相比,L2、L3、L4组血清总胆固醇、甘油三酯和低密度脂蛋白胆固醇含量均显著降低(P<0.05)。4)与L1和L4组相比,L2、L3组肝胰脏超氧化物歧化酶活性显著提高(P<0.05),但肝胰脏过氧化氢酶活性和丙二醛含量则没有显著差异(P>0.05)。由此得出,在饲料中添加适量的植物甾醇可以促进罗非鱼生长,降低血清脂质含量,同时对改善罗非鱼肝胰脏抗氧化能力有一定的积极作用。本试验条件下,在人工配合饲料中添加20 mg/kg植物甾醇时罗非鱼可获得最佳的生长性能。
This experiment was conducted to study the effects of phytosterol on growth performance,serum lipid metabolism indicators and hepatopancreas antioxidant indicators of tilapia(Oreochromis niloticus). Three hundred and sixty genetically improved farmed tilapia with an average body weight of(39. 25 ± 1. 56) g were randomly allotted to four groups with three replicates of each 30 individuals and fed basal diet supplemented with 0(Ll group,as control group),20(L2 group),40(L3 group),and 160 mg/kg(L4 group) phytosterol for 60 days,respectively. The results showed as follows: 1) compared with the L1 group,the weight gain rate(WGR) and specific growth rate(SGR) of tilapia in the L2 and L3 groups were significantly elevated(P<0.05),and the feed conversion rate(FCR) in the L2,L3 and L4 groups was significantly decreased(P<0.05),the best effects were found in the L2 group. 2) Diet supplemented different levels of phytosterol significantly decreased the muscle ash content of tilapia(P<0.05),but had no significant difference in muscle moisture,crude protein and crude fat contents(P > 0. 05). 3) Compared with the L1 group,the serum total cholesterol(TC),triglycerides(TG) and low-density lipoprotein cholesterol(LDLC) contents of tilapia in the L2,L3 and L4 groups were significantly decreased(P < 0. 05). 4) The hepatopancreas superoxide dismutase(SOD) activity in the L2 and L3 groups was higher significantly than that in the L1 and L4 groups(P<0.05),while the hepatopancreas catalase activity and malondialdehyde content in the L2 and L3 groups had no significant differences compared with the L1 and L4 groups(P > 0. 05). In conclusion,phytosterol is added in a proper amount in the diet can enhance the growth,decrease serum lipid contents,and has a certain positive effect on improving the hepatopancreas antioxidant ability of tilapia. Under the present experimental conditions,when adding 20 mg/kg phytosterol into the artificial compound feed,tilapia has the best growth performance.
作者
李志华
黄志毅
潘忠超
孙凤刚
赵会宏
∗
LI Zhihua;HUANG Zhiyi;PAN Zhongchao;SUN Fenggang;ZHAO Huihong(Guangdong Weilai Biotechnology Co.,Ltd.,Guangzhou 511400,China;College of Oceanography,South China Agricultural University,Guangzhou 510000,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2019年第12期5866-5872,共7页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
广东省自然科学基金(2017A030313099)
广东省科技计划项目(2015A020208002)
广东省农业科技特派员项目(华南农业大学)
关键词
植物甾醇
罗非鱼
生长性能
脂质代谢
抗氧化
phytosterol
tilapia(Oreochromis niloticus)
growth performance
lipid metabolism
antioxidant
