First, abortion reasons
In the daily feeding and management of dairy cows in the spring, there are many reasons leading to abortion of dairy cows:
1. In the daily management of management factors, estrus cows are not allowed to be polycultured with pregnant cows, and it is strictly forbidden to whip pregnant cows, drive them out quickly, or allow them to cross ridges to avoid abortions caused by cows crawling or moving too far. .
2. Empty factors Practice has proved that the longer cows have empty time, the higher the chance of abortion. In production, we must pay attention to the control of the graze of pregnant cows and empty cows, and feed more green and juicy feed to prevent infertility and miscarriage.
3. The younger the age of initial match, the higher the incidence of miscarriage. In production, the initial age of young cattle should be controlled to be over 17 months of age and weigh between 355 and 375 kg. In addition, it is necessary to strengthen the management of pregnant cows, provide full-priced compound feed and enough green and juicy feed.
4. Environmental factors Dairy cattle housing ground slope is too large, too much water, it is easy to cause the cow to slip and cause abortion. During the construction of the project, the ground slope of the dairy cows should be less than 3 degrees and the ground should be rough. During the breeding process, do not spray water on the ground at ordinary times.
5. Disease factors Dairy cows suffering from uterine diseases are prone to miscarriage. The production management should be strengthened to promote the recovery of the uterus of postpartum cows and to prevent and treat uterine diseases in time. Cows that have had two consecutive miscarriages should be considered for elimination.
6. Feeding factors The milk abortion rate was higher in 3-5 months pregnant women and lower in the 2 months before pregnancy. Therefore, it is imperative to strengthen the management of early and mid-term pregnant cows, and it is forbidden to feed poor-quality, mildewed, and frozen feeds.
7. Infectious disease factors Brucellosis is often widespread in cows. Therefore, comprehensive surveillance of brucellosis should be carried out in spring and autumn every year to cull and monitor positive cows in a timely manner to purify the farm area. At the same time, it is necessary to strictly monitor and quarantine the introduction of dairy cows. The newly introduced dairy cows will be observed for 30 days in isolation and can be polycultured when they are not sick.
Second, preventive measures
Prevention of dairy cattle abortion is the most important thing is to strengthen the management of feeding:
1. To strengthen the cleaning and disinfection of herds and the environment, we must always pay attention to the health of cows and brush carefully, and in particular, we must maintain the abdomen hygiene of pregnant cows to prevent the occurrence of vaginitis and metritis; regular quarantine, vaccination, deworming and Disinfection; and as far as possible to control the temperature of the barn environment, especially in the summer to do the work of cooling off.
2. Pay attention to the nutritional balance of dairy cows and ensure the balance of intake of vitamins, minerals, and trace elements according to the daily nutritional needs of dairy cows.
3. Strengthen the veterinary health supervision and regular disinfection and disease prevention of the dairy farm environment. The introduction of exotic cows requires strict quarantine and does not allow cattle with any disease to enter. UV disinfection personnel entering the production area can not be less than 8 minutes. Vehicles entering the production area must be strictly disinfected, and the production area should be disinfected once a week.
4. Pay attention to the systematic management of dairy farms and reduce the stress of dairy cows. Strengthen the management of dairy farms to obtain as much as possible information on the occurrence of aborted cows. Any abortion of cows begins with a single cow. Proper analysis can prevent the outbreak of abortion, reduce the chance of abortion and increase the efficiency of dairy farming.
5. Set up a sports ground (shelf located in front of or behind the cowshed, with an area of ​​6-8 square meters per cow) in order to ensure that the cow has sufficient light and exercise, but the pregnant cow is in late pregnancy The amount of exercise should not be too large. The floor of the barn should be non-slip to prevent the pregnant cow from being squeezed or bumped. It is not possible to whip the pregnant cow and prevent it from being frightened.
6. Give pregnant cows rich in vitamin A, vitamin B2, minerals, trace elements and other nutrient-rich, comprehensive quality feed to prevent fetal death due to nutritional deficiencies or nutritional imbalance and midway to ensure the normal development of early embryos need. Can not drastically change the feed type, feed formulation and feeding management methods, do not feed frost grass, mildew, frozen and spoilage feed, and potatoes, cottonseed cake and other potentially toxic feeds. To provide adequate clean drinking water, pregnant cattle sweat, do not drink cold water on an empty stomach.
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