Early pregnancy diagnosis plays an important role in the management of dairy cow production and the quality of herds. It is of great significance for improving the breeding rate of cattle and reducing the rate of empty space. Through the early pregnancy diagnosis, the pregnant cows and the non-pregnant cows are well aware of each other, so that appropriate feeding and management measures can be taken. Pregnant cows should be properly reared to ensure the health and normal development of the mother and the foetus and prevent miscarriage. For uncaged cows, timely treatment should be used to induce further estrus and then insemination. At the same time, analyze the reasons for the non-pregnant cattle and find solutions to minimize the loss caused by empty production. Therefore, early pregnancy diagnosis in dairy farms is a very important task.
Pregnancy breaks are a common gestational disease on dairy farms. The harm caused is not only the death of the fetus, so that the calving rate is reduced, but more importantly, it destroys the normal calving time, prolongs the number of empty days and calving intervals, and directly affects the amount of milk produced and the final production of this parity. Milk volume. Therefore, prevention of dairy abortion is an important task in dairy cow production.
1. Strengthen feeding management. The diet should be balanced and the feed should be diversified. The diet should be adjusted in time according to the changes in physiological traits. In the reasonable supply of energy and protein feed, adequate attention shall be paid to the supply of mineral feed calcium, phosphorus, manganese, zinc, iron and vitamins A, D, and E; no mildew and degenerative feeds are to be fed; no bombing, hunting, and rushing of cattle; In the treatment of pregnant cows, medication should be used with care, and laxatives and aphrodisiac drugs should not be used.
2. The occurrence of clinical abortion has occurred and the cause should be ascertained. For each aborted cattle should be fed alone, the abortion fetus, fetal membranes should be carefully examined to observe whether the fetus deformity, placental edema, necrosis. In order to confirm the diagnosis, microbiological examination of blood, uterine secretions, fetal stomach and its contents, liver and spleen of the cows can be taken; whether the cows have systemic diseases and understand the feeding and management situation. Abortion fetuses, birth covers, and grasses should be buried or incinerated.
3. Vaccine Injection. In order to prevent abortions caused by infectious diseases, it is necessary to: inoculate pigs from the age of 5 months to 6 months with pig No. 2 or No. 5 vaccine. Adult cows do 1 or 2 tests of brucellosis tube agglutination every year. Positive cows should be sequestered. As the herd expands, cows are exposed more frequently. Some new infectious diseases such as infectious bovine rhinotracheitis occur in cows. Wagonia virus diarrhea has also gradually spread. Therefore, vaccination should be considered.
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