| 摘要: |
| 于1991年7月21日-8月19日在河北省唐海县西林养殖场以养成期中国对虾为材料，在其配合饵料中添加维生素C进行中国对虾对维生素C需要量的试验。结果表明，当中国对虾体长为5.5 - 7.5 cm时，若以本项研究采用的配合饵料的基本成分和配比为基础，配饵中维生素C的最佳变化添加量为0.018％ - 0.024％ - 0.030％。研究发现，变动的维生素C适宜添加量对于中国对虾具有明显的促进生长，增强抗病力和抗低氧能力以及提高存活率的作用。 |
| 关键词: 维生素C 配合饵料 中国对虾 |
| DOI： |
| 分类号: |
| 基金项目:河北省科委资助项目，89200506号;河北省畜牧水产局资助项目，02-89-2号 |
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| STUDY ON OPTIMUM SUPPLEMENT OF VITAMIN C IN FORMULATED DIET FOR CHINESE PRAWN, PENAEUS CHINENSIS |
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Wang Auli, Mu Xuequan, ling Liying
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Department of Biology, Hebei university, Baoding 071002
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| Abstract: |
| Eighty equal body length and weight, healthy, pond cultivated Chinese prawn (Penaeus chinensis O’ sbecld were used in this July 21 - August 19, 1991 study on supplying their vitamin C requirements by adding vitamin C to their formulated diet. They were fed formulated diet composed of 25% fish meal, 40% bean cake, 14% maize powder and 21% corn flour, and were divided into four test groups (No.1 to No.4) fed the formulated diet with vitamin C added and a test group (Group 5) without vitamin C added to its formulated diet. The experiment was divided into three continuous 10 days stages. Fifteen prawn were put in each 60×30×45 cm3 aquaria at 18:30 p.m. on July 20 and given a whole night for adaptation. During the experiment the water temperature of the aquaria was 23.9 - 29.5°C, pH was 8.0 - 8.3, dissolved oxygen was 2.2 - 5.3 mg/L, salinity was 21.08. The feeding was 17% of the total diet every day at 06:00 a.m., 17% at 10:00 a.m., 16% at 15:30 p.m., 25% at 21:00 p.m., 25% at 23:00 p.m., The survival rate, length and weight increase of the prawn were measured to determine the optimum supplement of vitamin C into their formulated diet at specific growth stage.
It was found that length and weight gain and survival rate for P. chinensis, in descending order, were highest in groups fed the diet supplemented with 0.018% to 0.024% to 0.030% vitamin C (Group 3), with 0.024% to 0.030% to 0.036% group (Group 4), with 0.006% to 0.012% to 0.018% and 0.012% to 0.018% to 0.024% groups (Group 1 and Group 2) and were lowest in the control group (Group 5). Survival rate was 100% for Group 3, 66% for Group 5. Three individuals affected by Red-body Disease were found in Group 5. This experiment demonstrated that vitamin C is an essential nutrient supplement in the formulated diet for P. chinensis. The study showed that the optimum supplement of vitamin C was from 0.018% to 0.024% to 0.030% in the diet when the prawn-length was from 5.5 to 7.5cm and that increasingly adding optimum quantities of vitamin C had significant effect in increasing the growth rate, disease resistance, tolerance for low dissolved oxygen level, and survival rate of the prawn. |
| Key words: Vitamin C, Formulated diet, Penaeus chinensis |
