Addy B L, Thomas D
Trop Anim Health Prod. 1977 May;9(2):99-106. doi: 10.1007/BF02236388.
Beef fattening experiments were conducted in two wet seasons with Malawi zebu (Mz) and Friesian X Malawi zebu (F X Mz) steers grazing nitrogen-fertilised Rhodes grass pastures. The effects of stocking rate (5,7-5 or 10 steers/ha) and level of supplement (maize: madeya (maize bran) fed to steers at either 0-6 or 1-5 per cent of liveweight) were investigated over a 100 day period. Neither stocking rate nor supplement had an effect on daily liveweight gain but gain per hectare increased significantly with stocking rate. Comparative performance of the two breed types showed that the superior absolute gains of the F X Mz steers were not reflected in the efficiency parameters of supplement conversion or gain and carcass yield per unit liveweight. Hindquarter percentage was higher and subcutaneous fat was better distributed in the F X Mz. The practical significance of the results is discussed.
在两个雨季对马拉维瘤牛（Mz）和弗里斯兰×马拉维瘤牛（F×Mz）公牛进行了育肥试验，这些公牛在施了氮肥的罗德草牧场上放牧。在100天的时间里，研究了放养率（5、7 - 5或10头公牛/公顷）和补充饲料水平（玉米：将马德亚（玉米麸）以活体重的0 - 6%或1 - 5%喂给公牛）的影响。放养率和补充饲料对每日体重增加均无影响，但每公顷增重随放养率显著增加。两种品种类型的比较性能表明，F×Mz公牛的绝对增重优势并未体现在补充饲料转化率或单位活体重增重及胴体产量的效率参数上。F×Mz的后躯比例更高，皮下脂肪分布更好。讨论了结果的实际意义。
