Effects of replacement of soybean meal with extruded soybean on the growth performance and immunity in hybrid sturgeon Acipenser schrenckii ♀2 ×A. baeri ♂
WANG Chang-an, ZHOU Chang-hai, XU Qi-you, xu Hong, JIANG Shu-yi, ZHENG Qiu-shan , SUN Da-jiang
1. Heilongjiang River Fisheries Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; 2. Fuyuan Country Fisheries Technology Extension Station of Heilongjiang province, Fuyuan 156429, China
Abstract: The effects of replacement of soybean meal with extruded soybean on growth performance and immunity were studied in hybrid sturgeon （Acipenser schrenckii ♀ × A. baeri ♂ ） （ initial body weight of 75.3 g ± 3.8 g）. Four isonitrogenous and isocaloric diets were designed to replace 0 （ G1 ）, 35% （ G2）, 65.8% （ G3 ） and 93.2% （G4） soybean meal with extruded full -fat soybean and fed to the hybrid sturgeon at water temperature of 19.0 - 23.0 ℃ for 6 weeks. There Was no significant difference in the growth performance in the hybrid sturgeon fed the experimental diets （ P 〉 0.05 ）. However, the activities of plasma superoxide dismutase and lysozyme were found to increase by 13.6%, and 59.4% in group G3 （P 〈0.05）, respectively, compared with the control group （G1）. The contents of total plasma protein and globulin significantly increased by 9.9%,11. 5% and 12.0%, 14.7% in groups G3 and G4 （ P 〈 0.05 ） , respectively, indicating that the growth performance of the hybrid sturgeon was not affected significantly, and the immunity was improved by replacement of soybean meal with extruded full - fat soybean.
2009, Vol. 24 
