动物营养学报2016，Vol.28Issue(3)：864-871,8.DOI:10.3969/j.issn.1006-267x.2016.03.028
不同蛋白质和脂肪水平饲料对拉氏幼鱼生长、体成分和免疫力的影响
Effects of Different Protein and Lipid Level Diets on Growth, Body Composition and Immunity of Juvenile Phoxinus lagowskii
摘要
Abstract
To evaluate the effects of different protein and lipid level diets on growth, body composition and im-munity of juvenile Phoxinus lagowskii, twelve practical diets were formulated to contain 23%, 28%, 33%, 38%of protein supplied with fish meal and soybean meal, and 5%, 8%, 11%of lipid supplied with soybean oil, respectively.Each diet was fed to 3 net cages for 60 d, and each net cage had 30 juvenile Phoxinus lagowskii with an initial average body weight of (27.60±0.13) g.The results showed that protein level signifi-cantly affected weight gain rate ( WGR) , special growth rate ( SGR) , protein efficiency ratio ( PER) and feed conversion rate ( FCR) ( P<0.05) , and lipid level significantly affected PER and FCR ( P<0.05) .No signifi-cant interactions between dietary protein and lipid levels existed for growth performance indices ( P>0.05). The WGR and SGR of fish in 23%and 28%protein groups were significantly higher than those in 33%and 38%groups ( P<0.05); whereas, the FCR of fish in 8%lipid group was significantly lower than that in 11%lipid group ( P<0.05) , but there was no significant difference between 8%and 5%lipid groups ( P>0.05) . With the increase of protein level, the crude protein, crude lipid and ash contents of whole body were firstly in-creased and then depressed, and the highest values of them were found when protein level was 28%.While moisture content of whole body was not significantly affected by dietary protein level ( P>0.05) .With the in-crease of lipid level, the crude lipid content of whole body showed an increasing trend, but no significant difference was found between 8%and 11%lipid groups ( P>0.05) .The survival rate in low and middle pro-tein groups ( 23%and 28%protein groups) was higher than that in high protein groups ( 33%and 38%protein groups) at 48 h after injecting Aeromonas hydrophila ( P<0.05) .The survival rate in low lipid group ( 5%lip-id group) was higher than that in other 2 groups ( 8%and 11%lipid groups) at 48 h after injecting Aeromonas hydrophila.In conclusion, the overall results in this study suggest that diet containing 23%to 28%protein and 5%to 8%lipid with a protein to energy ratio of 23.67 to 26.03 mg/kJ is suitable for juvenile Phoxinus lagowskii.关键词
拉氏/幼鱼/蛋白质/脂肪/生长/体成分/免疫力Key words
juvenile Phoxinus lagowskii/protein/lipid/growth/body composition/immunity分类
农业科技引用本文复制引用
蒋湘辉,骆小年,金广海,李敬伟,刘义新,杨培民,张健..不同蛋白质和脂肪水平饲料对拉氏幼鱼生长、体成分和免疫力的影响[J].动物营养学报,2016,28(3):864-871,8.基金项目
辽宁省农业攻关及产业化项目---渔业新品种引进、开发（2015103049）；渔业新品种选育与健康养殖技术 （）
