不同精粗比对西杂公牛生长发育的影响

The Effects of Different Ration Levels on Growth and Development of Simmental Cross-bull

[目的]本试验旨在研究不同日粮精粗比对西杂青年公牛体重及体尺(体高、体长、胸围)的影响,为西杂公牛育肥提供理论依据。[方法]选择18头9月龄平均体重约270kg的西杂公牛,随机分为1、2、3组,分别饲喂精粗比为45∶55(低)、50∶50(中)和55∶45(高)的3种日粮。[结果]在日粮种类相同的情况下,西杂牛的日增重受精料水平的影响较大,但体尺的日增量受精料水平的影响较小。[结论]不同精粗比日粮的西门塔尔公牛的日增重不同,西门塔尔公牛采食精粗比较高的日粮,其增重速度较快。

[Objective]The purpose aims to study the effects of different dietary forage to concentrate ratio on body weight and body size （body height, body length,chest circumference） of Simmental young bull. [Method] Nineteen 6 months old male Simmental bull with the average weight about 270 kg were randomly divided into three groups and fed concentrate to forage ration of 45 ： 55 （low）, 50 ： 50 （middle） and 55 ： 45 （high） of three kinds of diets, coarse straw hay and corn silage for the trial of 3 months. [Result]In the case of the same diet type, daily weight gain of Simmental cross-cattle had material influenced with the level of fertilization,but the body size of Simmental crosscattle had small influence on the level of fertilization. [Conclusion] The average daily gain of Simmental bull was different by concentrate to forage ratio diets. The Simmental bulls had faster weight gain by feeding high concentrate to forage ratio diets.