乳用公犊早期断奶草地育肥试验研究

A Study on Fattening of Early-weaned Bull Calves of Black and white Dairy Cows of Pastureland

本文着重介绍以草养畜，利用黑白花乳用公犊，人工哺乳１～２月龄分３组断奶，哺乳期每天补饲精料１ｋｇ，随后转入人工草场全年放牧育肥，在不补饲的情况下，１５～１８月龄群体平均体重为２８３．６９～３３４．８２ｋｇ，日增重５４６～５５０ｇ；１８月龄个体最高体重达３９１ｋｇ，日增重６５４ｇ。

A study was made to raise calves of black and white dairy cows on pastureland.the bull calves were 1 to 2 months old, they were weaned and divided into three groups.During the lactation 1kg concentrate per day was supplemented.After ablactation the bull calves were put on grassland all year around and fattened there. Although no supplement feed was supplied, the average daily gain ranged from 546 to 550 grams and the average body weight at 15 to 18 months old reached 283. 69 to 334. 82kgs. In this herd the highest daily gain and the highest body weight at 18 months old were 654 grams and 391kgs respectively.