Autumn cows have a short estrus cycle and long duration, which is the golden season for breeding. The following technical points should be mastered in the mating of cows:
First, strong
Prior to the mating period, cows of the right age should have a moderate body condition, and neither over- or under-weighting are conducive to breeding. Cows with poor body condition can adjust the feed ratio appropriately, increase the number of nutrition and feeding, and extend the grazing time, mowing the grass to feed the cows and prompting the cows to ovulate. Usually, we must pay attention to nutritional balance to prevent excessive intake of protein and energy feed caused by excessive cow obesity, affecting the quality of breeding.
Second, aphrodisiac
1. Induced feelings. With estrus bulls chasing non-estrus cows, urging cows to heat.
2. Hormone aphrodisiac. For estrus-producing cows, 25-35 mg of ethylene estradiol, 40-60 mg of diphenol ethane, or 3-5 g of triad hormone can be used to estrus after injection into the cow.
3. Chinese herbal aphrodisiac. Use motherwort 30 grams, pumpkin leaves 24 grams, 15 grams of safflower, Jianshui to cattle gavage, or use the old date tree split skin 0.5 kg, brown sugar 1 kg, add water 3 kg, Jianshui to cattle early and late Irrigation once, even for 2-3 days.
Third, timely breeding
After the estrus of the cow, the appetite decreased, and she was upset. She liked to approach the bull and climbed over each other. He often performed urination but had less urine, and the pus was flushed, congested and swollen, slightly open, often accompanied by white translucent mucus outflow. Cows also have a small amount of blood flowing from the vagina. At this point touch the cow's buttocks, oxtail Gao Qiao, quiet, two hind legs open to do the mating action. After the appetite gradually recovers, the libido declines, the vulva swelling subsides, and the mucus is less thick and thick. At this time, it is most suitable to breed or inseminate the cow. The use of artificial insemination is an important measure to increase the conception rate of cows, especially for the rectal grasp method. During operation, insert the vas deferens flatly into the cervix 5-7 cm, then slowly inject the semen. After the insemination is completed, slowly pull the vas deferens to prevent damage to cow vagina or semen.
Fourth, strengthen management
During the breeding period, the bulls should be fed with green feeds and concentrates. When they are busy, they should also feed animal feeds such as eggs and fish meal. Within 1-2 hours after the cows are mated, do not exercise vigorously. Try to avoid drinking or eating too much. After 15 days of breeding, feed was added at the same time. At the same time, 1-1.5 kg of wheat bran was added, and clean drinking water containing a small amount of salt was supplied to promote fertilized egg implantation. During pregnancy, cows are fed feeds rich in protein, vitamins, and minerals. It is strictly forbidden to feed poor quality feeds to prevent enteritis, miscarriage, weak or stillbirths. The barn environment should be quiet to prevent miscarriage caused by excessive scaring, colliding, slipping, whipping, or overhead racking.
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