摘要 2010年，用2 m ×2 m ×2．5 m 规格的网箱于水温22～30℃养殖初体质量为（5．82±0．06） g 、20日龄的鳡鱼，分别用添加酵母硒0、0．30、0．60、0．90、1．20 mg/kg 湿饲料的饲料料投喂10周，研究添加酵母硒对鳡鱼主要消化酶活性和饲料转化率的影响。试验结果表明，投喂添加酵母硒的饲料可显著增加鳡鱼肠淀粉酶、脂肪酶和胰蛋白酶活性，提高饲料转化率（P＜0．05）。当酵母硒为最适添加量0．6 mg/kg 湿饲料时，第5、10周鳡鱼肠淀粉酶和胰蛋白酶活性最高，对质量增加率、特定生长率和饵料系数影响最大，其中鳡鱼质量增加率为337．92％±35．10％（第5周）和590．94％±21．28％（10周）（P＜0．05），特定生长率为3．97％±0．21％（第5周）和2．68％±0．04％（第10周）（P＜0．05），饵料系数为5．45±0．20（第10周）。
Abstract： A feeding trial was conducted to study the effects of dietary selenium-yeast additions on digestion and food conversion of yellowcheek carp Elopichthys bambusa juveniles cultured in a net cage of 2 m × 2 m × 2 .5 m at water temperature of 22 ~ 30 ℃ in 2010 .The 20 day old juveniles with initial body weight of (5 .82 ± 0 .06 ) g were fed diets supplemented with 0 ,0 .30 ,0 .60 ,0 .90 ,and 1 .20 mg of selenium-yeast per kg wet diet for 10 weeks .Significant effects of the dietary selenium-yeast additions were observed on the activities of amylase ,lipase and trypsin in the intestine as well as food conversion (P< 0 .05) .In the diet containing the optimal selenium-yeast of 0 .6 mg/kg wet diet ,the peak activities of intestinal amylase ,and trypsin were observed in Weeks 5 and 10 ,with weight gain rate of 337 .92% ± 35 .10% in Week 5 and 590 .94% ± 21 .28% in Week 10 ( P < 0 .05) ,specific grow th rate of 3 .97% ± 0 .21% in Week 5 and 2 .68% ± 0 .04% in Week 10 (P < 0 .05) ,and feed coefficient of (5 .45 ± 0 .20) in Week 10 .
收稿日期: 2013-07-25
引用本文:
许友卿,李太元,丁兆坤,向建国. 添加酵母硒对鳡鱼消化酶活性与饲料转化率的影响[J]. 水产科学, 2013, (7): 391-395.
XU Youqing,LI Taiyuan,DING Zhaokun,XIANG Jianguo. Effects of Dietary Selenium on Digestion and Feed Conversion in Yellowcheek Carp Elopichthys bambusa. Fisheries Science, 2013, (7): 391-395.
