饲粮中添加桑叶粉对新西兰白兔生长性能及血清主要生化指标的影响

Effects of Adding Mulberry Leaf Powder into Diet on Growth Performance and Main Blood Biochemical Indexes of New Zealand White Rabbits

根据新西兰白兔生长性能及血清主要生化指标的变化,研究饲粮中桑叶粉的适宜添加量。选用120只35日龄的断奶新西兰白兔供试,随机分为4个处理组,分别用桑叶粉添加水平（质量分数）为0（对照组）、15%（试验Ⅰ组）、20%（试验Ⅱ组）、25%（试验Ⅲ组）的饲粮饲养,调查其生长性能及血清主要生化指标,结果显示：试验Ⅰ组新西兰白兔的日增体质量和70日龄体质量极显著高于对照组（P〈0.01）,料重比极显著低于对照组（P〈0.01）,整个试验期采食量差异不显著（P〉0.05）;各试验组新西兰白兔血清中的血糖、总胆固醇、总甘油三酯、尿素氮含量均显著低于对照组（P〈0.05）,而对照组血清中的总蛋白质含量与各试验组之间差异并不显著（P〉0.05）。研究结果表明,饲粮中添加桑叶粉对于新西兰白兔的生长性能和血清的几项主要生化指标有显著影响,且以15%～20%添加量的饲养效果最佳。

According to the changes in growth performance and main blood biochemical indexes of New Zealand white rabbits,an experiment was conducted to study the appropriate amount of mulberry leaf powder in diets. A total of 120 weaned New Zealand white rabbits of 35-day-old were used as experimental materials and randomly divided into 4 treatment groups. After being fed with diets supplemented with 0（ control group）,15%（ experimental group Ⅰ）,20%（ experimental group Ⅱ） and 25%（ experimental group Ⅲ） mulberry leaf powder,the growth performance and main blood biochemical indexes of New Zealand white rabbits were determined. The results showed that the daily body weight gain and body weight at day 70 of New Zealand white rabbits in experimental group Ⅰ were significantly higher than those in control group（ P〈0. 01）,the ratio of feed to weight gain was extremely significantly lower than that in control group（ P〈0. 01）,but there was no significant difference in feed intake during the entire experimen-tal period（ P〈0. 05）. The concentrations of blood sugar,total cholesterol,total triglyceride and urea nitrogen in each experimental group were all significantly lower than those in the control group（ P〈0. 05）,while there was no significant difference between the control group and each experimental group（ P〈0. 05）. The results showed that the diets supplemented with mulberry leaf powder had significant effect on the growth performance and several main blood biochemical indexes of New Zealand white rabbits and the optimal dosage was 15% to 20%.