Let's learn about the management objectives and precautions of breeding bulls.
First, the main points of breeding bulls
Breeding cattle need to provide energy in the form of concentrated feed in order to accelerate growth and improve sexual desire.
The feed for breeding bulls should be the same as that for adult bulls. As far as possible, choose high-quality forage grass such as green hay and grass, and do not use distiller's grains, straws, rapeseed cakes and cottonseed cakes.
When there is no grass in winter and spring, each cow should be fed 0.5 1 kg carrot every day to supplement vitamin deficiency and minerals in daily feed.
Second, the management objectives of bull breeding
(1) Improve health.
The bull's health mainly depends on whether it is energetic, fat and suitable for breeding.
A good seed weight is in the state of upper body, and its waist angle is obvious but not abrupt.
The ribs are slightly exposed but not obvious, and the muscles are exposed but not rich.
If the breeding is too rich, the bull will be too fat and depressed; If the nutrition is insufficient, the sexual desire and semen quality of bulls will be reduced.
(2) Ensure the quality and vitality of semen.
The ejaculate volume, sperm motility, density and survival index of bull can meet the specified standards, which is suitable for producing frozen semen.
(3) prolong the service life.
Breed bulls generally have sexual performance at 7 months old, and reach sexual maturity at 10 ~ 14 months old. At this time, the breed bull has not reached its maximum reproductive capacity and cannot be overused.
We should strengthen feeding management and pay attention to rational utilization to ensure the longevity and normal production of breeding bulls.
Three. Matters needing attention in breeding management of breeding bulls
Breeding bulls should be isolated from big cows and kept in groups with breeding cows.
For a fierce bull, it needs to be pulled with a hook. While one person holds the reins, the other person holds the hook with both hands and hooks it on the nose ring to control its movement.
In the management of bull breeding, we must insist on exercising once in the morning and once in the afternoon, each time 1.5 ~ 2.0 hours. Exercise methods include rotating frame, sleigh or cart.
Practice has proved that insufficient exercise or long-term tethering will make the bull's temperament worse, the semen quality will decrease, and it is prone to limb and hoof diseases and digestive tract diseases.
However, excessive exercise or overwork will also adversely affect the health and semen quality of cattle.
Brush twice a day, each time 10 minute. Regular brushing is not only beneficial to the health of cattle, but also beneficial to the affinity between people and cattle, which can achieve the purpose of training and taming.
In addition, you should shave your hooves once in spring and autumn.
During the breeding season, the ratio of male to female should be adjusted. General 1 ~ 2-year-old bull breeds 10 ~ 20 cows, 2-3-year-old bull breeds 20 ~ 30 cows, and 3-year-old bull breeds 30 ~ 40 cows.