摘要
在水族箱中 ,用体重 19～ 2 5g的中华绒螯蟹 (Eriocheirsinensis)对配饵中蛋白质的能蛋比与蟹生长之间的关系进行了研究。蛋白质设定为 36 %、4 0 %和 4 4 % 3个水平 ,能蛋比设定了 4 0、4 5和 50kJ/kg 3个水平 ,每个水平各有 6个重复。结果表明 ,配饵中的粗蛋白含量和能量蛋白比与蟹体生长、蛋白增加量和饲料系数存在着显著的相关关系 (P <0 .0 5) ,蟹体的生长、SGR和PER随饲料中蛋白质含量的增加和能蛋比下降呈上升趋势 ,饲料系数则下降。当粗蛋白含为 4 4 % ,能蛋比为 4 5kJ/kg时 ,可获最大生长和饲料效率。因而 。
The sample crabs (Eriocheir sinensis) with body weight of 19～25 g were collected from Shangyu Culturing Farm of Zhejiang Province. With the initial body weight above, the experiment was carried out. Three pure protein levels of diet were set, which were 36%,40% and 44%. Also, 3 levels of energy/protein ratio(C/P) were set, which were 40, 45 and 50 kJ/kg. For each level above, 6 replicas were set. The composition of the experimental diets included casin, fish oil and dextrin. The experiment went on 27 d and the water temperature was kept between 22～25 ℃. During this term, feeding was performed 2 times per day and the residual diets were collected 2h after the feeding and dried to constant weight at a constant temperature of 60℃, then the diet-intaken amount could be calculated. The protein content was determined with Kjeldahl nitrogen method, and the special growth rate (SGR) was calculated based on 100(lnW t-lnW 0)/t, where W t was average end body weight and W 0 the initial; t was experimental days. The protein efficient ratio (PER) was body weight increment to protein-intaken amount. The feed coefficient ratio (FCR) was protein-intaken amount to body weight increment. The results showed that the weight gain, SGR and PER increased with the increase of protein content and the decrease of C/P; the optimum protein content and C/P in diet were 44% and 40.5 kJ/kg for growth and dietary effcient of young crab. It comes to the conclusion that it is of significance to consider an optimum C/P at each growth stage.
出处
《中国水产科学》
CAS
CSCD
2000年第1期55-59,共5页
Journal of Fishery Sciences of China
基金
浙江省教委资助项目 !(981193)
关键词
中华绒螯蟹
生长关系
配合饵料
能量蛋白比
Eriocheir sinensis
growth
formulated diet
ratio of protein to energy
