生长期中华鳖饲料适宜能量_蛋白质水平及必需氨基酸模式的研究

Study on the optimal levels of energy, crude protein and essential amino acid model of diets for growing turtle

摘要:

以 1 5 0g左右的 1 70只中华鳖为试验动物 ,随机分为 1 7个组。以饲料能量、蛋白质水平为试验因素 ,采用 2因子 5水平的回归正交旋转组合设计得到 9个试验饲料营养组合 ,与 1 6个组试验动物相对应 ,进行 6 0d饲养试验。试验结果 ,第 9～ 1 6组鳖日增重 2 .2 2g/d极显著地高于其它试验组 (p <0 .0 1 ) ,比增设的对照组 1 .38g/d高 6 0 .87% (p <0 .0 1 ) ,其饲料系数为 1 .43,较其它组低 1 2 .2 7%～ 45 .0 0 % ,较对照组 (1 .97)低2 7.41 %。结果表明 ,9号饲料能量 1 6 .2 8MJ/kg、蛋白质 42 .49%水平及其必需氨基酸模式适宜于生长幼鳖的营养需要 ,肌肉RNA/DNA值与饲料营养水平和日增重有高度的正相关关系。 更多还原

关键词:中华鳖 蛋白质 能量 EAA模式 饲料 生长期

Abstract:

Using two- factor, f ive- level, orthogonal regression rotational combination design, 170 turtles with an average initial weight of 150g, were randomly divided into 17 groups ( one control and 16 treatments) in feeding trial for 60d to study the optimal levels of energy , crude protein ( CP) and essential amino acid ( EAA) model. Average daily gain ( ADG) of group 9- 16 ( 2. 22g/ d) was signif icantly higher ( p< 0. 01) than those of the others, and 60. 87% higher ( p< 0. 01) than the control ( 1. 38g/ d) . Compared w ith the control and other treatments, FCR of group 9- 16 was 1. 43, 27. 41% and 12. 27% - 45. 00% lower, respectively . It is concluded that the levels of energy ( 16. 28MJ/ kg) , CP ( 42. 49%) and EAA model of the ninth diet were suitable to nutrient requirement of grow ing turtle. There was a strongly positive correlation between RNA to DNA ratio of turt le muscle and nutrient level and daily gain.

Key words:turtle ( Trionyx sinesis ) , protein, energy , EAA model