When dairy cows complete a lactation period, the body consumes a lot of nutrients, and the body is extremely tired. At this time, it should enter the dry period to get enough rest and strengthen nutrition to restore and improve the constitution of the dairy cow for the rapid development of the fetus. To improve the milk production of the next lactation period to prepare the material basis, and to prevent dystocia during childbirth and postpartum milk fever. First, dry milk time. Dry milk time is usually determined by the individual condition of the cow. According to the date of the cow's due date, the gravid cows are generally stopped 60 days before delivery. Second, the dry milk method 1, natural dry milk method. When dairy cows are scheduled to dry milk, the daily output is 5-8 kg. Milk can be dried naturally by stopping milking as planned. 2, artificial dry milk method. If dairy cows have a daily milk output of about 10 kilograms when they are scheduled to dry milk, artificial dry milk can be used, that is, concentrates and juicy ingredients are stopped 4 to 6 days before the planned dry milk. Only feed hay, limit the number and quantity of drinking water, extend exercise time, reduce the number of milking, stop breast massage, and change the original milking time so that dry milk can be completed within 4 to 6 days. This method is suitable for most dairy cows with medium or low milk production. 3, gradually dry milk method. This method is suitable for dairy cows with high milk production. It should be managed 10-20 days before the planned dry milk day in order to gradually dry milk within 10-20 days. Third, feeding and management during dry milk 1, feeding standards. The milking of dairy cows in the dry period is generally based on the standards required by dairy cows with medium milk production levels, and the diet is adjusted every 10 days. The specific approach is: 10-20 days after dry milk, in order to avoid stimulating breast functional activities, to reduce dietary standards by 10-15%; the first 30-40 days, 15-20% higher than the standard; after the first 50 days, than The standard is 5-10% lower; the rest is fed on standard basis. 10 days before delivery, the mammary glands begin to move and the breast volume increases. Individual cows can subtract fine or multivitamins, leaving only high quality hay and bran to reduce the activity of the mammary gland, and can also feed some “VAD powder†as appropriate. Controls postpartum gastrointestinal disorders and helps the delivery of fetuses and discharge of placenta. Conditional injection of vitamin E sodium selenite 40 ml before delivery, intramuscular injection points, to further improve the normal immune system function of dairy cows during the perinatal period. 2, feed quality. Feeding milk to dry dairy cows should be of good quality and should be full of laxatives. Conditional winter and spring seasons should give some alfalfa and carrots to supplement the deficiency of vitamins and minerals. 3, do a good job of preventing fetal flow. For dry dairy cows can not be fed rotten, deterioration, corruption, frozen feed; winter water temperature can not be less than 12 °C; late pregnancy is strictly prohibited feeding distiller's grains, potatoes, cottonseed cake, etc., so as not to cause miscarriage, dystocia or fetal clothing, and Other diseases. 4, daily management. To enhance the exercise and brushing, breast massage should be performed at least once a day after the safety stoppage to the first 15 days in order to promote better and faster recovery of breast and breast cells. Fourth, attention to dry milk problem 1, the number of milking should be gradually reduced. Every time milking strives to be clean, it will cause dry milk to fail or cause breast disease. The last milking should be particularly meticulous and thoughtful, use 50 °C warm water to wash the breast and fully massage the breasts, the breast must be drip without leaving. 2, drug stopped milk. In order to prevent the induction of mastitis, if necessary, drug suspension can be applied, such as penicillin oil. 3. Observe breast changes carefully. Prevent the occurrence of mastitis. If it has become inflamed, promptly treat it. After the inflammation disappears, dry it again. 4, strengthen health care. China Agricultural Network Editor
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