新疆褐牛犊牛在天然草场放牧条件下生长发育的研究

目的]选用2～4月龄的新疆褐牛牛犊,研究其在放牧条件下体重、体尺的变化情况,为更好地指导新疆褐牛犊牛在放牧条件下的生产.方法]通过在夏牧场进行现场试验,测定新疆褐牛犊牛的体尺指标和体重.结果]从2.5到4.5月龄增重55.78 kg,日增重达0.930 kg.4.5月龄胸围比2.5月龄增加20.78%.3.5月龄的体斜长比2.5月龄增加10.2 cm,增幅为11.12%;4.5月龄比3.5月龄增长5.3 cm,增幅为5.20%,比2.5月龄增长15.5 cm,增幅为16.90%.4.5月龄体高比2.5月龄长高了11.7 cm,长高幅度为13.48%.4.5月龄管围比2.5月龄管围增大1.3 cm,增大幅度为10.66%.结论]随着月龄的增加,体重增长迅速,体尺指标也在增长,尤其相差一个月以上差异明显,但增幅呈下降趋势.

Growth and Development of Xinjiang Brown Calves Grazed on Natural Pasture

To investigate the growth and development of grazing Xinjiang Brown calf at the age of 2～4 months and to direct the practical production for grazing condition in production, body size and weight were tested. From 2.5 to 4.5 months of age, weight gain was 55.78 kg, the daily weight gain reached 0.930 kg. Heart girth of 4.5-month-old calf was 20.78 % higher than that of 2.5-month-old calf. Body length of 3.5-month-old calf was longer than that of the 2.5-month-old for 10.2 cm. the cannon bone circumference of 4.5-month-old calf were longer than that of 2.5-months calf for 1.3 cm. These indicated that with the increase of month, the body weight and body sizes increased rapidly, but the growth rate gradually decline.