生长期实验兔日粮消化能、蛋白质、粗纤维适宜水平和氨基酸模式的研究

以日本大耳白断奶仔兔为试验动物 ,试验分两期。第一期 ,以 55日龄、健康、体重相近、来源一致的 90只大耳白仔兔随机分为 9组。试验日粮采用L9( 34)正交试验设计与 9组试验动物相对应的 9个日粮配方及其营养水平组合 ,进行 45d的饲养试验 ,研究试验日粮能量 (DE)、蛋白质 (CP)、粗纤维 (CF)适宜水平和必需氨基酸 (EAA)模式。以生长速度和血液生理指标为试验观察指标。试验结果 ,45d平均日增重以第 2组 34.5g为最高 ,比最低的第 9组2 7.5g提高 2 5.45% ,差异极显著 (p <0 .0 1 ) ,表明第 2组日粮配方及其营养水平组合为优。第二期 ,对一期第 2组日粮进行重复试验 ,以验证一期饲养试验效果的重现性。选用一期同源的 40日龄健康体重相近的 60只大耳白断奶仔兔进行 60d饲养试验。试验结果 ,60d平均日增重 34.0g,与一期结果相似 ,全部血液生理指标均在正常范围。两期试验结果表明 ,第 2组日粮DE1 2 .0MJ.kg- 1 、CP1 5.0 %、CF1 4.0 %的水平组合和必需氨基酸模式适宜于生长阶段大耳白兔的营养需要。

Study on The Optimal Levels of Digestible Energy, Crude Protein and Crude Fiber and Essential Amino Acid Model for Growing Experimental Rabbit

Japan large-ear white weanling-rabbits, similar body weight and isogene, were used in this experiment for two periods to study the optimal levels of digestible energy (DE), crude protein (CP) and crude fiber CF) and essential amino acid (EAA) model. Orthogonal designation L 9(3 4) was chosen for the experiment. Ninety-baby rabbits (55d) were randomly divided into 9 groups and fed 9 different diets for 45d during the first period. Average daily gain (ADG) of group 2 (the highest) and group 9 (the lowest) were 34.5g and 27.5g respectively, and the ADG of the former is 24.45 percentage higher than that of the latter. The results showed that the composition and nutrient levels of diet in group 2 were optimal. In the second period, 60 rabbits (40d) were selected to examine the effects of group 2 diet during the first period. ADG was 34.0g and similar to that in the first period. All blood biochemical values are normal. It is suggested that the DE (12.0MJ.kg -1 ), CP (15.0%) and CF (14.0%) and EAA model of group 2 diet are suitable to the nutrient requirement of growing large-ear white rabbit.