摘要
本试验旨在研究饲料脂肪水平对洞庭青鲫(Carassius auratus var.Dongtingking)幼鱼生长性能及肉品质的影响。将健康且体重均匀的240尾洞庭青鲫幼鱼随机分为4组,每组3个重复,每个重复20尾。以鱼粉、豆粕、棉籽粕、菜籽粕等为蛋白质源,菜籽油和豆油(1∶1)为脂肪源,配制4种等氮不等脂的试验饲料,各组分别饲喂脂肪水平为0、4%、8%、12%的试验饲料。试验期60 d。结果表明:1)12%脂肪水平组的终末体重、增重率及特定增长率(SGR)显著高于0和4%脂肪水平组(P<0.05)。2)12%脂肪水平组肌肉粗脂肪含量显著高于0和4%脂肪水平组(P<0.05),12%脂肪水平组肌肉水分含量显著低于0脂肪水平组(P<0.05)。3)0和4%脂肪水平组肌肉铁含量显著高于8%和12%脂肪水平组(P<0.05),0脂肪水平组肌肉镁含量显著高于8%脂肪水平组(P<0.05)。4)12%脂肪水平组的肌肉多不饱脂肪酸(PUFA)含量显著高于0脂肪水平组(P<0.05),12%脂肪水平组的肌肉中C18∶2n6、n-6 PUFA含量及n-6/n-3 PUFA显著高于0和4%脂肪水平组(P<0.05),0脂肪水平组的肌肉中C16∶0和饱和脂肪酸(SFA)含量显著高于8%和12%脂肪水平组(P<0.05)。5)0脂肪水平组肌肉中非必需氨基酸和风味氨基酸含量显著高于其他各组(P<0.05)。由此可见,饲喂高脂肪水平(12%)饲料的洞庭青鲫幼鱼虽获得较好的生长效果,但其肉品质有所下降。
This experiment was conducted to investigate the effects of dietary lipid level on growth performance and flesh quality of juvenile Carassius auratus var.Dongtingking.A total of 240 healthy juvenile Carassius auratus var.Dongtingking with similar body weight were randomly divided into 4 groups with 3 replicates per group and 20 fish per replicate.Four isonitrogenous and unequal lipid experimental diets were formulated using fish meal,soybean meal,rapeseed meal and cottonseed meal as protein source and rapeseed oil and soybean oil(1∶1)as lipid source,and fish in each groups were fed experimental diets which the lipid levels were 0,4%,8%and 12%,respectively.The experiment lasted for 60 days.The results showed as follows:1)the final body weight,weight gain rate and specific growth rate of 12%lipid level group were significantly higher than those of 0 and 4%lipid level groups(P<0.05).2)The muscle crude lipid content of 12%lipid level group was significantly higher than that of 0 and 4%lipid level groups(P<0.05),while the muscle moisture content of 12%lipid level group was significantly lower than that of 0 lipid level group(P<0.05).3)The muscle iron content of 0 and 4%lipid level groups was significantly higher than that of 8%and 12%lipid level groups(P<0.05),and the muscle magnesium content of 0 lipid level group was significantly higher than that of 8%lipid level group(P<0.05).4)The muscle monounsaturated fatty acids(PUFA)content of 12%lipid level group was significantly higher than that of 0 lipid level group(P<0.05),the contents of C18∶2n6 and n-6 PUFA and n-6/n-3 PUFA in muscle of 12%lipid level group were significantly higher than those of 0 lipid level group(P<0.05),and the contents of C16∶0 and saturated fatty acids(SFA)in muscle of 0 lipid level group were significantly higher than those of 8%and 12%lipid level groups(P<0.05).5)The contents of nonessential amino acids and flavor amino acids in muscle of 0 lipid level group were significantly higher than those other groups(P<0.05).In conclusion,the juvenile Carassius auratus var.Dongtingking fed high lipid level(12%)diet can get better growth effect,but the flesh quality is reduced.
作者
类延菊
晏锦
唐忠天
邹超霞
杨品红
张运生
黄海洪
黄春红
谢中国
LEI Yanju;YAN Jin;TANG Zhongtian;ZOU Chaoxia;YANG Pinhong;ZHANG Yunsheng;HUANG Haihong;HUANG Chunhong;XIE Zhongguo(Key Laboratory of Zoology in Hunan Higher Education,Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province,Hunan University of Arts and Science,Changde 415000,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2020年第12期5839-5849,共11页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
湖南省自然科学基金项目(2018JJ3372)。
关键词
洞庭青鲫
脂肪水平
生长性能
肉品质
Carassius auratus var.Dongtingking
lipid level
growth performance
flesh quality
