The breeding standard for cows is one-year-old calves, but many breeding cows do not meet this standard during actual farming. The average gestation period of cows is 285 days. The estrus and breeding can be carried out within two months after delivery to achieve the so-called breeding standard. However, some cows do not estrus or breed poorly after half a year or later. In the case of the situation, the failure to produce calves increased the cost of breeding, which greatly affected the economic benefits of the farm. So how can we make the cow's reproductive capacity reach the standard level?
1. Cows are raised during pregnancy
The management of the cow during pregnancy directly determines the physical and difficult yield of the cow and greatly affects the reproductive capacity of the cow. If the cow is malnourished, it will cause dystocia due to weak constitution and difficult to recover in a short period of time after birth, so that it can not be estrus. When overnutrition or lack of exercise can also cause dystocia, once dystocia occurs, it will have a significant impact on cow reproduction. Cows should maintain moderate nutrition during pregnancy, with 7 to 80% lyrics, and must also pay attention to minerals, trace elements and vitamin supplements. Appropriately enhance the amount of cow movement, do a good job in epidemic prevention, deworming and other health care, so that the cow has a good constitution.
2, cow postpartum health care
When the cow enters the production stage, the breeder must be assisted by the side production, and in the case of normal production, artificial assisted production is avoided. The cows drink brown sugar bran soup 2 hours after delivery, that is, 1 kg of brown sugar, 1.5 kg of bran and 8-10 kg of boiling water, and the cows are allowed to drink once after cooling to normal temperature. Intramuscular injection of refined tetanus antitoxin to prevent tetanus within 24 hours after delivery. In the first 3 days after delivery, 8 to 12 million units of penicillin were injected intramuscularly, and 20 to 30 ml of prosthetic postpartum was administered, 2 times a day for 3 days, for postpartum anti-inflammatory and promotion of lochia discharge. If the lochia has not been cleaned or has obvious inflammation on the 10th day after delivery, consider using normal saline, 0.01%~0.05% potassium permanganate solution or 1%~2% sodium bicarbonate and the same amount of sodium chloride solution. uterus.
 3, cow postpartum breeding
When the cow has poor appetite in the first 3 days after birth, feed the concentrate less and increase the content of wheat bran in the concentrate to restore the digestive function of the cow as soon as possible. Then gradually increase the amount of concentrate feed, and gradually reduce the wheat bran content to normal levels and appropriate increase in protein feed content, the demand for minerals, trace elements and vitamins is also essential. At the same time, it is necessary to ensure sufficient water intake, in addition to drinking water, drink soup can also be added to the green and juicy feed. When the yak reaches 10 days of age, the cow can be rushed to the stadium to increase the amount of light and exercise.
4, induced cow estrus
Breeding properly managed cows will develop estrus within 2 months after birth, at which point they can be directly bred. If the cow does not have any signs of estrus within 2 months after birth, and the nutritional level is up to standard and there is no inflammation, the Chinese medicine can be used for aphrodisiac. The specific method is 100 grams of Yangqi, Epimedium, Angelica, Astragalus, Cinnamon, Yam, 80 grams of rehmannia, mix thoroughly into the feed (brome, bran) and feed three times. The use of ovulation-promoting drugs can also promote cow estrus. If the cow is poor in constitution or has inflammation, it must be treated first, then treated to induce estrus, otherwise it is difficult to successfully conceive after estrus breeding.
As long as the cow's prenatal and postnatal feeding management and health management are done, under normal circumstances, the five major cows will estrus within two months. If the cow is healthy, the farmer can take measures to promote his estrus. It is necessary to pay attention to the fact that cows are ill after treatment and should not be treated in the case of illness.
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