南方牧草停滞期补饲对适繁母牛繁殖性能及体重的影响

Effects of supplementary feeding on reproductive performance and body weight of breeding cows during withered grass season in South China

为了探究南方牧草停滞期补饲对适繁母牛繁殖性能和体重的影响,试验选用能繁母牛150头(云岭牛与本地黄牛杂交F1代牛,年龄2~4岁),随机分为3组,试验1组放牧+补饲3 kg/(头·d)青干草,试验2组放牧+补饲2 kg/(头·d)精料,对照组只放牧不补饲,测定犊牛初生重、成活率和繁殖成活率,每60 d对试验牛进行称重。结果表明:2个试验组犊牛初生重、犊牛成活率和繁殖成活率均高于对照组,其中试验2组犊牛初生重、犊牛成活率及繁殖成活率最高;2个试验组繁殖母牛体重下降幅度均小于对照组。说明在南方牧草停滞期对放牧适繁母牛进行补饲可提高其繁殖性能并缓解掉膘情况。

This study was conducted to explore effects of supplementary feeding on reproductive performance and body weight of breeding cows during withered grass season in South China.In this experiment,150 breeding cows(Yunling cattle crossed with local yellow cattle,F1 generation cattle,age 2 to 4 years old)were randomly divided into 3 groups.The experiment group 1 was grazed and supplemented with 3 kg/(head·d)hay,the experiment group 2 was grazed and supplemented with 2 kg/(head·d)concentrate,and the control group was grazed without supplement.Determine the calf birth weight,calf survival rate and reproductive survival rate,and weigh the test cows every 60 days.The results showed that the birth weight,survival rate and reproductive survival rate of calves in the two experimental groups were higher than those in the control group,and the experiment group 2 was the highest in withered grass season in South China.The weight loss of the cows in the two experimental groups were smaller than that of the control group.Therefore,it can be seen that supplementary feeding of breeding cows during withered grass season in South China can improve thereproductive performance and alleviate weight loss.