干粉饲料中添加不同比例水分对生长期乌苏里貉生长性能、营养物质消化率及氮代谢的影响

Effect of Different Ratios of Food to Water of Dry Powder Feed on Growth Performance,Nutrient Digestibility and Nitrogen Metabolism of Growing Wusuli Raccoon Dogs

本试验旨在探讨干粉饲料中添加不同比例水分对生长期乌苏里貉生长性能、营养物质消化率及氮代谢的影响。选用11周龄左右平均体重为（3．47±0．20）kg的健康乌苏里貉30只，随机分为3组，饲喂不同料水比1：2．5（Ⅰ组）、1：3．5（Ⅱ组）和1：4．5（Ⅲ组）的干粉饲料，每组10只，公、母各半。预试期7 d，正试期67 d。结果表明，11、12～13周龄时，Ⅰ组平均日采食量显著低于Ⅱ、Ⅲ组（P〈0．05）；14、15～20周龄时，各组间平均日采食量差异均不显著（P〉0．05）；累计总采食量Ⅰ组显著低于Ⅱ组（P〈0．05）；15～17周龄时，Ⅲ组平均日增重显著高于Ⅰ组（P〈0．05），其他周龄平均日增重、总增重及料重比各组间差异均不显著（P〉0．05）；各组间干物质消化率、蛋白质消化率和脂肪消化率差异均不显著（P〉0．05）；Ⅱ组乌苏里貉尿量极显著高于Ⅰ、Ⅱ组（P〈0．01）；各组间乌苏里貉食入氮、粪氮、尿氮、氮沉积、净蛋白质利用率和蛋白质生物学价值差异均不显著（P〉0．05）。由此得出，生长期乌苏里貉干粉饲料中料水比以1：3．5～1：4．5较为理想。

This experiment was aimed to explore the effect of different ratios of food to water of dry powder feed on growth performance, nutrient digestibility and nitrogen metabolism of growing Wusuli raccoon dogs. Thirty Ⅱ-week old healthy Wusuli raccoon dogs with average body weight of （3.47± 0.20） kg were randomly assigned into 3 groups. The Wusuli raccoon dogs were fed experimental diets with dry powder feed of ratio of food to water of 1 ： 2.5 （group Ⅰ ）,1 ：3.5（group Ⅱ ）,1 ： 4.5（group Ⅲ ）,respectively. The pre-test period lasted for 7 days and the trial period lasted for 67 days. The results showed that the average daily feed intake of each week from 11,12 to 13 weeks in group I was significantly less than that in groups Ⅱ and Ⅲ （P〈0.05）, the average daily feed intake of each week from 14,15 to 20 weeks was no significant difference among all groups （P〈0.05）. The total intake in group Ⅰ was significantly less than that in group Ⅱ（P〈0.05）. The average daily gain of each week from 15 to 17 weeks in group Ⅲ was significantly higher than that in group I （P〈0.05） ,while the average daily gain, total weight and the rate of feed intake to body gain in other week old were no significant differences among all groups （P〉 0.05）. The protein digestibility, fat digestibility and dry matter digestibility were no significant differences among all groups （P〉0.05）. The amount of urine in group Ⅲ was extremely significantly higher than that in groups Ⅰ and Ⅱ（P〉0.01）. The nitrogen intake, fecal nitrogen, urine nitrogen, nitrogen deposition, net protein utilization and biological value of protein were no significant differences among all groups （P〉0.05）. In conclusion, the appropriate ratios of food to water of dry powder feed of growing Wusuli raccoon dogs was 1 ： 3.5 to 1 ：4.5.