Cattle farmers understand that cows have a broken estrus time, fast ovulation, and abundant feed in autumn, which is the period when bulls are energetic and the best breeding world. But there are many factors that affect the success of breeding cows, once the best time is missed, it will lead to breeding failure and cause losses, so when is the cow breeding better? What are the precautions? Let's find out.
First, the best time for cow breeding
1. After 12-18 hours of cow estrus, it can be bred in accordance with the principle of "morning estrus, afternoon mating, afternoon estrus and next morning mating".
2. After the cow's libido disappears to disappear or disappears for 5 hours, the cow has not accepted the climb, the performance is quiet, the vaginal mucus is viscous, and the mucus is pulled and contracted 7-8 times with the index finger and thumb.
3. In the third stage of follicular development, that is, the follicular maturity stage for rectal examination, and ovulation examination is carried out 10-12 hours after mating, if the follicle is still not ruptured, it should be matched again.
4. If you can't grasp the accurate breeding time, you can use the Beijing Beite Double Ovulation Analyzer to automatically detect the ovulation of the cattle and determine the best time for cattle breeding.
Second, breeding precautions
1. Stout
Before breeding comes, the age-appropriate cows should also have medium physical condition, and the poor health of the cattle can appropriately adjust the feed ratio, increase nutrition and feeding times, and extend the grazing time, mow the grass to feed the cattle, and promote the cow to ovulation. At the same time, we should also pay attention to nutritional balance, so as not to cause excessive intake of protein and energy feed and cause cow obesity and affect the quality of breeding.
2, Rousal
Chasing cows with estrus bulls to induce cows to estrus, or taking hormone production for cows that do not estrus, injecting cows with ethylene estradiol 25-35 mg, or diol ethane 40-60 mg, can also make cows estrus mating.
3. Timely breeding
After the cow is in estrus, the appetite is reduced, the excitement is restless, like to approach the bull, crawling across each other, the vagina is often accompanied by white translucent mucus flowing out, and a small amount of blood flows from the vagina of individual cows, which is the best mating time. The use of artificial insemination during breeding is an important measure to improve the fetal rate of cows, the vas deferens are inserted into the cow's cervix for 5-7 cm, and then slowly inject semen, and the vas deferens are slowly pulled out after sperm infestation to prevent vaginal damage or semen outflow of the cow.
4. Strengthen management
During the breeding period, the bull should strengthen the feeding of green feed and concentrate, and during the busy period, animal feed should be fed, such as eggs, fishmeal, etc. The cow should not exercise vigorously within 1-2 hours of just breeding, and try to avoid drinking water or eating too much. After half a month of mating, nighttime feeding and clean drinking water containing a small amount of table salt are provided to promote the implantation of fertilized eggs. It is strictly forbidden to feed moldy, spoiled, frozen, toxic, over-acidic or strongly irritating feed to prevent enteritis, miscarriage, weak fetus or stillbirth.
The above is the introduction of the cow breeding time and precautions, I hope to help you,
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