甘南高寒地区放牧条件下南德温杂种肉牛的增重试验

针对甘南高寒地区本地黄牛生长发育缓慢，生产性能低下，引进南德温肉牛，对甘南本地黄牛进行杂交改良。通过对12-18月龄南黄F1代阉牛和甘南本地黄牛阉牛10头，采用放牧加补饲尿素-糖浆多营养舔砖，育肥90d。结果表明：南黄F。代牛目均增重0．65kg，甘南本地黄牛头均日增重0．49kg，南黄F1代牛的生长发育情况及增重均明显高于甘南本地黄牛，试验组比对照组提高收益54．63％。

Gannan alpine grazing areas under the conditions of SouthDevon cattle hybrid of the pilot study of weight gain

Because Gann is a high and cold area, so the yellow cattle in here grows slowly , low-productivity. In order to improve these poor characteristics, we introduced the South Devon beef cattle and it was used to Gannan yellow cattle＇s production performance . we Feeds ten 12 - 18 month old South yellow F1 generation of bullock and Gannan local ox bullock with the Syrup - Molasses Multi - Nutritions Lick Block for 90 days. The result showed that NanHang F1 cattle＇s weight increased 0.65kg every day and GanNan local cattle＇s weight increased 0.49kg every day. NanHang F1 cattle＇s growth situation and weight is better and higher than local yellow cattle and efficient improved about 54.63%.