论文部分内容阅读
用L—抗坏血酸—2—硫酸(C_2)和L—抗坏血酸—2—单磷酸(C_3—M)同L—抗坏血酸(C_1)相比较进行斑节对虾(Penaeus monodon)稚虾对于补充维生素 C 饵料需求量的生长试验。用补充 C_1、C_2或 C_3—M其中任何一个的7种含量(0,30,50,200,500,1000,2000 mg/kg)纯饵料投喂斑节对虾(平均体重为1.06±0.05g)8周。每一种饵料对虾组重复投喂3次。结果表明:投喂补充含有 C_1,C_2或 C_3—M饵料的对虾比投喂没有补充的对照饵料的对虾有明显高的增重(P<0.05)和较好的饵料转换率(F.C.R.)。投喂补充含有 C_1,C_2或 C_3—M分别为<261.5,>386.3或>37.6mg/kg 饵料的对虾存活率比投喂没有补充的对照饵料的对虾要明显地高些(P<0.05)。在投喂 C_1的对虾中肝胰腺抗坏血酸浓度比投喂 C_3—M、C_2的要高些,而且当饵料补充抗坏血酸含量增加时,浓度通常是增加的。折线回归分析表明:斑节对虾需求量为40.25mgC_3—M/kg 饵料或相当于18.7mg 抗坏血酸/kg 饵料。也表明:L—抗坏血酸—2—硫酸效率仅为所需维生素 CL—抗坏血酸—2—单磷酸的25%。
The demand of vitamin C diet for Penaeus monodon juveniles was compared with L-ascorbic acid-2-sulfate (C_2) and L-ascorbic acid-2-monophosphate (C_3-M) Amount of growth test. Penaeus monodon (average body weight 1.06 ± 0.05 g) was fed for 8 weeks with 7 dietary supplements (0, 30, 50, 200, 500, 1000, 2000 mg / kg) supplemented with any of C_1, C_2 or C_3-M. Each feeding shrimp group repeated feeding 3 times. The results showed that prawn supplemented with C_ 1, C_2 or C_3-M bait had significantly higher weight gain (P <0.05) and better food conversion rate (F.C.R.) than that of the control bait without supplementation. Survival of shrimps fed diets containing <261.5,> 386.3 or> 37.6 mg / kg C_1, C_2, or C_3-M, respectively, was significantly higher (P <0.05) than that of shrimp fed diets supplemented with no supplementation. The concentration of ascorbate in hepatopancreas was higher in C_1-fed shrimp than in C_3-M and C_2, and the concentration was usually increased when dietary supplement of ascorbic acid increased. Polyline regression analysis showed that the demand for P. monodon was 40.25mgC_3-M / kg diet or equivalent to 18.7mg ascorbic acid / kg diet. It also shows that L-ascorbic acid-2-sulfate is only 25% of the required vitamin CL-ascorbic acid-2-monophosphate.