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Qingfeng, Shandong | How long does it take for cattle to breed | The best month of breed
Release time:
2021-05-10
With the continuous increase in the price of calves in recent years, the profit of relying solely on breeding beef cattle is getting lower and lower, and there may even be a phenomenon of "cow panic", so it is more and more important to buy good varieties and good quality calves. Difficult and more expensive. At present, the only way to solve this problem is to insist on self-reproduction and self-breeding. Only in this way can we ensure our own high-quality cattle source. The knowledge of cow breeding time and breeding methods we introduced today is indispensable.
With the continuous increase in the price of calves in recent years, the profit of relying solely on breeding beef cattle is getting lower and lower, and there may even be a phenomenon of "cow panic", so it is more and more important to buy good varieties and good quality calves. Difficult and more expensive. At present, the only way to solve this problem is to insist on self-reproduction and self-breeding. Only in this way can we ensure our own high-quality cattle source. The knowledge of cow breeding time and breeding methods we introduced today is indispensable.
The suitable time for insemulation of cows is 9-24 hours after the start of estrus, and the interval between the two inseminitions is 8-12 hours. Because usually the estrus duration of the cow is 18 hours, the cow ovulates 10-15 hours after the end of the estrus, the egg survival time is 6-12 hours, the egg to the fertilization site takes 6 hours, the sperm enters the fertilization site for 0.25-4 hours, the sperm maintains the fertilization ability in the reproductive tract for 24-50 hours, and the sperm capacitation time takes 20 hours.
Cows ovulate at night, the production should be insemoperated at night or early morning, to avoid high temperature insemate, especially in summer, in order to improve the conception rate. For old and weak cows, the duration of estrus is short, and the mating time should be advanced appropriately. The first estrus after delivery of cows generally Denim about 40 days or more, which has a lot to do with nutritional status. Generally, mating in the 2nd to 4th estrus period after delivery is easy to get pregnant, so we should seize the opportunity to mating in time.
1. Natural mating: Natural mating is also called local mating, which refers to direct mating between males and cows. This method has low utilization rate of bulls, high purchase price of bulls, high feeding and management cost, and is easy to infect diseases, so it is not suitable for production. With the development of science and technology, natural mating has been replaced by artificial insemination.
2. Artificial insemination. In the work of cattle improvement in a large area in my country, the artificial insemination technology of cows has become a modern and scientific breeding technology in the cattle industry, and has been widely promoted and applied throughout the country. Artificial insemination technology is to manually collect bull semen. After quality inspection, dilution, treatment and freezing, semen is input into the reproductive tract of cows with a deferon. Search and pay attention to: efficient cattle raising, daily release of cattle raising technology, disease prevention and control methods, beef and live cattle prices. I hope everyone can recommend our "efficient cattle raising" platform to more cattle farmers. The eggs released by the cow are fertilized and pregnant, and the calf is finally born. The application of artificial insemination technology has improved the breeding efficiency of fine bulls, accelerated the breeding process and breeding improvement speed of cows, increased the conception rate of breeding cows, and avoided the spread of diseases caused by direct contact with reproductive organs.
1, 10 to 12 months after the birth of beef cattle, hybrid beef cattle 12 to 15 months of age, the bull can produce with fertilization ability, the cow can discharge mature eggs, then called mature. Maturity by no means means that it can be used for reproduction, because the beef cattle are not yet fully developed and mature. If reproduction is carried out, it will not only affect the growth and development of the beef cattle themselves, but also have poor quality offspring.
2. The body of beef cattle has the inherent shape of adult beef cattle, which is called body maturity. When the body is mature, it can participate in breeding. Generally, the body maturity of beef cattle is 1.5~2 years old, that of hybrid beef cattle is 2.5 years old, and that of dairy cattle is about 15~22 months old. However, due to differences in beef cattle breeds, feeding management, and climatic conditions, the possibility of promoting and delaying body maturity is high.
1. Cow Baoding: The inseminate cow will be brought into the mating rack for Baoding. Baoding may not be required when the operation is skilled. In addition, the tail of the cow is hung up with a string, and then the vulva of the cow is washed with clear water. It can also be disinfected and dried with 2% lysol or 0.1 potassium permanganate solution.
2. Semen Thawing: Prepare warm water at 37~42 ℃, take out a thin tube of frozen semen from the liquid nitrogen tank with tweezers and immerse it in warm water, shake it gently for about 10 times, wipe off the water droplets on the surface of the thin tube, cut off the seal, put the embolized end down into the gun, put the jacket on and tighten.
3. Insemination method: One hand is inserted into the rectum to grasp the cervix across the intestinal wall, the arm of the hand is pressed down to open the vulva, and the other hand is inserted downward after being inclined from the vulva for a period of time, until it is inserted to the junction of the cervix and the uterine body, and the vas can be withdrawn with the injection. In order to ensure the conception rate, compound once every other day.
1. Initial mating age: large beef cattle breeds such as Simmental cattle and Charolais cattle must be over 1.5 years old, with a skeleton and weight of over 70% of adult cattle, while small beef cattle breeds or native cattle must be over 1 year old, with a skeleton and weight of over 60% of adult cattle.
2, frozen sperm selection: smaller cows or first-time cows should not choose more than its size, weight 2 times the bull, larger cows or cattle can use larger purebred bulls or frozen sperm for mating, but the bull size, weight is still not more than 3 times the cow.
3. Mating Time: Ovulation time is not easy to master in the actual mating process. Mating is generally carried out according to the time of estrus. Mating is carried out in the afternoon for estrus in the morning (fear of crossing) and in the morning for estrus in the afternoon. In order to improve the mating rate, compound can be used.
4. Pre-match inspection: Both bulls and cows must undergo health inspections before mating to prevent cross-infection. In the case of epidemic disease, it is not suitable for mating and should be eliminated directly.
5. Equipment disinfection: In the case of artificial insemination and mating, the insemination equipment must be checked before insemination to see if it can be used normally. At the same time, strict disinfection should be carried out to prevent cross infection.
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