【摘要】 为探索新的蛋白饲料资源,我们用磷酸脲在春季对西门塔尔杂交肉牛进行了为期60 d的短期育肥试验。结果:60 d增重对照Ⅰ组61.3 kg,试验Ⅰ组66.1 kg,试验Ⅱ组68.5 kg。试验Ⅰ组和试验Ⅱ组的增重比对照Ⅰ组分别提高7.83%和11.75%,差异均不显著。对照II组60 d增重为76.4 kg,比试验Ⅱ组的高11.53%,表明在春季优质青草充足,能量饲料有保障的条件下,无论是在补充料为不含蛋白原料的纯玉米的条件下补饲非蛋白氮,还是在补充料为配合料的条件下补饲非蛋白氮,对杂交肉牛增重的影响不大。更多还原

【Abstract】 In order to find out new protein feed resource,an experiment was conducted to study the effect of urea phosphate supplementation in different nutrition level concentrates on finish beef gain.The beeves were randomly divided into 4 groups: control Ⅰ,corn;control Ⅱ,concentrates;treatment Ⅰ,corn + urea phosphate and treatment Ⅱ,concentrates + urea phosphate.The testing period was 60 days.The results indicated that the gain of control Ⅰ,control Ⅱ,treatment Ⅰ and treatment Ⅱ were(61.3kg),76.4kg,66.1kg and 68.5kg respectively.Compared to control Ⅰ,gain of treatment Ⅰ and treatment Ⅱ increased by(7.83%) and 11.75%,but the difference was not significant.The results indicated that NPN could not increase gain of finish beeves under the conditions of being fed with high quality fresh forages and energy feedstuff in Spring.更多还原