1, scientific feeding: provide cows with scientific and reasonable food and feed t
1, scientific feeding: provide cows with scientific and reasonable food and feed them with grass, concentrate and juicy feed. 2, mating time: generally, mating at the end of estrus, estrus in the morning and mating in the afternoon. 3. Breeding method: Natural breeding is to let cows breed by themselves, and artificial assisted breeding is to assist bulls to breed when there is a big size gap. Artificial insemination refers to the collection of bull semen, after checking, freezing and thawing, transplanting it into the reproductive tract of estrus cows, which can be completed within 10 second.
First, how do cows match the whole process?
1, scientific feeding
Provide scientific and reasonable food for cows. When cows are in estrus, they are fed with grass, concentrated feed and juicy feed. Get ready for mating.
2. Breeding time
(1) Determine the breeding time of dairy cows, usually in the end of estrus, morning and afternoon.
(2) Generally, breeding can only be carried out when the physical function of bulls is fully developed. Usually, bulls and cows are only finished when they are basically 3 years old. When they are mature, they can start mating at this time.
3. Breeding method
(1) Natural mating: Let the cows mate by themselves.
(2) Artificial breeding: Sometimes there is a big gap between male and female cows, so artificial breeding can be used to assist male cows.
(3) Artificial insemination: collect bull semen, check the freeze-thaw situation, and then transfer the semen to the reproductive tract of oestrus cow, which is completed within 10 second.
4. Livestock control
We should pay attention to controlling the proportion of cattle, and we should not let bulls breed too frequently, which will affect the reproductive rate of bulls. Those cows that are too old and have weak reproductive ability should be eliminated in time.
Second, how long did the cow know she was pregnant after mating?
1. If the cow is pregnant successfully, after three months of mating, the temperament of the cow will become very docile, the food intake will increase obviously, and the color of the cow hair will become bright. After five months of mating, you can see that the abdominal area becomes larger and the pulse will be significantly accelerated. Using the veterinary B-ultrasound machine, we can not only judge whether the cow is pregnant with a bull calf or a cow calf, but also detect the physical condition of the cow calf.
2. Whether a cow is pregnant can be analyzed according to estrus, appetite and chest circumference. Generally, cows will not be in estrus periodically after successful pregnancy, and the breasts of primiparous cows can touch lumps, and the milk yield will show an obvious downward trend. With the enlargement and expansion of the breast, nipple thickening can squeeze out thick secretions.