Effects of variously processed soybeans meal on production performance of Cyprinus carpio juveniles.

The effect of replacing fish meal with raw and variously processed soybeans meal on growth,feed utilization and carcass composition of common carp,Cyprinus carpio was evaluated in an 8-week trail.The common carp fingerlings [initial body mass(5.89±0.36) g] were fed five isonitrogenous and isocaloric feeds containing 30% digestible protein and 15 MJ·kg-1 digestible energy.Feeds contained SBM replace 50% of the fish meal protein,such as raw soybean(RSB),processed soybean by chemical inactivator,processed soybean by heating,processed soybean by heat alcohol respectively.Results showed that the dietary of RSB caused reduced growth(P0.05) and increased feed conversion ration(FCR).There is no significantly difference among five groups for feed intake,The growth performances of carp fed processed soybeans by chemical inactivator and by heating were significantly superior to those fed RSB,and similar to those fed soybean meal,RSB had no effect on growth,feed intake and FCR.It was concluded that the dietary RSB significantly inhibited the growth of carp,and the activity of soybean trypsin inhibitors could be reduced to the acceptable levels by processing of chemical inactivator and heating.Nutrient composition of fish muscle such as moisture,fat and ash content was significantly affected by raw soybean(P0.05).The effect of processing of heating on fish was superior to other groups.The degree of negative effect of soybean anti-nutritional factors on fish is anti-trypsin inhibitor agglutinin soybean antigen protein under the experimental condition,proper control can reduce the negative impact of soybean anti-nutritional factors on fish,such as heating processing of chemical inactivator processed by heat alcohol.