The Application Of Modified Soy Protein In The Feed Of Carassius Auratus Gibelio

Thanks to the science and technology of the relative industries amplified to the fishery in recent years, aquaculture has been getting rapid development. The application and development of bioactive peptides on the aquaculture plays a crucial role on shortening culture cycle and increasing the production of the aquaculture in China. As the rapid development of aquaculture, great changes of relationship between supply and demand of the aquatic products have taken place in China. The better quality of the aquatic products should meet with the people’s requirements. Under the conditions of the world economic integration, the entry to WTO, global competition in the home and abroad markets and technical barriers in the international trade, increased supervision on the water environment and feed quality are needed. It is very necessary to increase the feed utilization, enhance the healthy development of feed and reduce the degree of water pollution leaded by the aquaculture activities. It plays an important role on increasing the economic benefits, improving the quality of the aquatic products and occupying the international markets.The modified soy proteins were added into the dietary diet of Carassius auratus gibelio in this study and randomized block design was applied to add1‰and2‰modified soy proteins in the diet under the same crude protein level. The experimental fishes were divided into3treatments, and each group has three replications, with150individuals in total. The aim is to study the effects of different additive amount on the growth and meat quality.The growth rates are significantly higher in both the1‰and2‰groups of modified soy protein in the dietary diet compared with the control (P<0.05), which increases by10.40%and15.10%respectively. The feed conversion ratio in the1‰and2‰group decreases by17.85%and19.82%respectively (P<0.05). The specific growth rate group of the2%o modified soy proteins group was31.87%more than that in the control, and the hepatosomatic index of it was15.54%less than the control, and both differences were significant(P<0.05). The specific growth rate of Group1‰has the increasing tendency compared with the control. There is no significant difference in the fatness and mortality rate among three groups.Thecontent of crude protein in the muscle of gibel carp in Group2%o is the highest and observed higher than Group1‰and the control, which is (88.16±1.42)%. The content of crude protein in Group1‰is (86.82±0.90)%, significantly higher than the contorl. The content of ash in the muscle has the simarly result, while there is no significant difference between Group1‰and the contorl. There is no observed difference in the crude fat and moisture.The results indicate that the modified soy protein added in the dietary diet could significantly increase the specific growth rate and decrease feed conversion rate of Carassius auratus gibelio. The modified soy protein could effectively facilitate the synthesis of the muscle proteins and the absorption and utilization of calcium and phosphorus. The addition of2%o modified soy protein has better effects on growth and meat quality than1‰addition. All results maybe based on the addition in the content of crude protein and essential amino acids in modified soy protein.