脲酶抑制剂和粗饲料产品对育肥羊生长性能及血液生化指标的影响

选择小尾寒羊母羔羊24只,体重20.5kg左右,采用2×2析因试验设计。一种粗饲料产品是玉米秸块,在此基础上设加与不加20mg/kg脲酶抑制剂共两个水平;另一种粗饲料产品是苜蓿+玉米秸的混合块,然后设添加与不加20mg/kg脲酶抑制剂共两个水平。进行60d育肥试验,以研究在不同粗饲料产品日粮中添加脲酶抑制剂对育肥羊生长性能和血液生化指标的影响。结果表明:①在不同粗饲料产品日粮中添加脲酶抑制剂均能提高育肥羊的日增重,苜蓿+玉米秸混合块日粮较玉米秸块日粮的育肥羊有较高的日增重;②粗饲料产品较脲酶抑制剂对育肥羊的日增重作用效果大;③粗饲料产品及脲酶抑制剂对试验羊的血液生化指标均没有显著影响。

Effect of urease inhibitor and different roughage diets on growth performance and blood biochemical indices in fattening sheep

Twenty four little-tail sheeps weighing approximately 20.5 kg each ,were used in a 2×2 factorial design experiment to determine the effect of urease inhibitor and roughage products on growth performance and blood biochemical indices. The four rations containing corn straw block or mixing block of alfalfa and corn straw as roughage products with or without urease inhibitor were fed in feeding trial. The result showed:①Adding the urease inhibitor or alfalfa to diets can increase the average daily gain of fattening sheep;②The types of roughage product have more effect than urease inhibitor on the average daily gain;③ The types of roughage product and urease inhibitor both have no effect on the blood biochemical indices.