Effects of Substitution of Solvent-extracted Cottonseed Meal for Part Fish Meal on Growth,Body Composition and Serum Biochemical Indices of Juvenile Siberian Sturgeon(Acipenser baerii Brandt)
WU Xiufeng1 XUE Min1 GUO Liya1,2 WU Lixin3 ZHENG Yinhua1(1.Feed Institute Research,Chinese Academy of Agricultural Sciences,Beijing 100081,China;2.Beijing Enhalor Biotechnology Co.Ltd,Beijing 100081,China;3.Dalian Fisheries University,Dalian 116023,China)
Effects of replacement of part fish meal with solvent-extracted cottonseed meal(SECM) in diet on the growth performance,body composition and serum biochemical indices of juvenile Siberian sturgeon(Acipenser baerii Brandt) were investigated in this study.In this trial,the fish meal protein in diet was replaced with SECM by 0,25% and 40% respectively.25% and 40%,substitution levels had 2 amino acid balance treatments: blood meal balance treatment(B) and crystal amino acid balance treatment(C).Five experimental diets were named as SECM 0,SECM 25B,SECM 25C,SECM 40B and SECM 40C,respectively.Four hundred juvenile Siberian sturgeon with initial body weight of(57.36±0.17) g were randomly allotted to 5 groups(with 4 replicates of 20 fish) and each group fed 1 experimental diet.The trial lasted for 8 weeks.The results showed as follows: the weight gain rate(WGR),specific growth rate(SGR) and protein efficiency ratio(PER) in SECM 25C group were significantly higher than those in SECM 25B group(P0.05).The feed conversion ratio(FCR) in all substitution groups was higher than that in control group except for SECM 25C group(P0.05).The feed intake rate increased with the increase of SECM substitution levels,and that in SECM 25C group,SECM 40C group and SECM 40B group was significant higher than that in SECM 0 group(P0.05).The protein efficiency rate(PER) in SECM 25C group and SECM 40C group was significantly lower than that in other groups(P0.05),and the protein retention rate(PRR) in SECM 25C group and SECM 40C group was significantly lower than that in control group and SECM 25B group(P0.05).Compared with blood meal,crystal amino acid significantly decreased the viscerasomatic index(VSI) and hepaticsomatic index(HSI)(P0.05).The serum alanine aminotransferase(ALT) activities in SECM 25C group and SECM 40C group were higher than those in SECM 25B group(P0.05).In conclusion,under the ideal protein profile,40% fish meal protein in the diet of juvenile Siberian sturgeon could be replaced by SECM,and Siberian sturgeon could effectively utilize the crystal amino acid.
【CateGory Index】： S963
【CateGory Index】： S963