动物营养学报2015，Vol.27Issue(12)：3754-3762,9.DOI:10.3969/j.issn.1006-267x.2015.12.014
饲料中添加β-葡聚糖对黄颡鱼幼鱼生长性能、血清生化指标及抗嗜水气单胞菌感染能力的影响
Effects of Dietary β-Glucan on Growth Performance, Serum Biochemical Indices and Resistance Against Aeromonas hydrophila of Juvenile Yellow Catfish ( Pseudobagrus fulvidraco)
摘要
Abstract
A 42 days feeding trial was conducted to study the effects of dietary β-glucan on growth perform-ance, serum biochemical indices and resistance against Aeromonas hydrophila of juvenile yellow catfish ( Pseudobagrus fulvidraco) . A basal diet was supplemented with 200, 600 and 1 000 mg/kg β-glucan to pre-pare three test diets. Seven hundred and twenty fish with an initial body weight of (1.53±0.04) g were selected and randomly divided into 7 groups, including feeding with basal diet as control group ( G0 group) , continu-ous feeding with diets of different levels ofβ-glucan ( SG200, SG600 and SG1000 groups) , and interval feed-ing with diets of different levels of β-glucan for 7 days followed by the basal diet for 7 days ( IG200, IG600 and IG1000 groups) . The continuous feeding groups had 4 replicates, and control group and interval feeding groups all had 3 replicates, and each replicate had 30 fish. After the feeding trail, the fish were challenged with Aeromonas hydrophila for 96 h to calculate the accumulative mortality rate ( AMR) . The results showed as fol-lows:1) there were no significant differences in weight gain rate ( WGR) , feed conversion ratio ( FCR) , pro-tein efficiency ratio (PER) and survival rate (SR) among 7 groups (P>0.05), but hepatosomatic index (HSI) in IG1000 group was significantly lower than that in control group (P<0.05). Furthermore, the fish fed diets supplemented withβ-glucan showed higher WGR and PER than the control group, and continuous fed diet supplemented with β-glucan showed higher WGR than interval fed diet supplemented with the same level ofβ-glucan, the highest values appeared in SG600 group. 2) Compared with the control group, the contents of crude protein, ether extract and ash of whole body in the other six groups were increased to some extent and the moisture content was decreased to some extend, but no significant differences were observed (P>0.05). 3) There were no significant differences in serum biochemical indices among all groups (P>0.05). However, compared with the control group, the contents of serum globulin ( GLB) and total protein ( TP) in SG1000 and IG600 group were higher, but the activities of serum glutamic oxalacetic transaminase ( GOT) and glutam-ic pyruvic transaminase ( GPT ) in β-glucan supplementation groups were lower. 4 ) After Aeromonas hy-drophila infection for 96 h, the AMR was 35% to 46% among all groups and there was no significant differ-ence ( P>0.05) . In conclusion, except for HSI of interval feeding 1 000 mg/kg β-glucan is significantly de-creased, supplementation of 200, 600 and 1 000 mg/kg β-glucan to diets, using either continuous or interval feeding strategies, has no significant effects on growth performance, body composition, serum biochemical in-dices and resistance against Aeromonas hydrophila of juvenile yellow catfish.关键词
β-葡聚糖/黄颡鱼/生长性能/血清生化指标/嗜水气单胞菌Key words
β-glucan/yellow catfish/growth performance/serum biochemical indices/Aeromonas hydrophila分类
农业科技引用本文复制引用
李永娟,王卫民,黄燕华,曹俊明,王国霞,赵红霞,刘少昱,马永萍..饲料中添加β-葡聚糖对黄颡鱼幼鱼生长性能、血清生化指标及抗嗜水气单胞菌感染能力的影响[J].动物营养学报,2015,27(12):3754-3762,9.基金项目
广东省海洋渔业科技推广专项(A201301F01) （A201301F01）
广东省自然科学基金团队项目(10351064001000000) （10351064001000000）
