After 305 days of lactation, dairy cows produce a lot of milk, and the body consumes a lot. Before the next birth (between the end of pregnancy and the date of calving), the cow needs to accumulate stamina to restore her constitution for the next lactation period. To be fully prepared, it is necessary to stop milk production (dry milk period) for 60 to 65 days (high-yield or continuation of lean mother cows is extended to 70-80 days). This period of cow feeding and management directly affects the performance of postpartum lactation production performance. Should be given enough attention.
1. Suspension of milk can be gradually stopped milk method and fast stop method. Gradually stopping the milk method is to reduce the feeding amount of concentrates and succulent feeds about 15 days before the scheduled stoppage of milk, adopting measures such as reducing the number of milkings, milking every other class, every other day, and artificially reducing the milk production; Normally 3 times milking per day is reduced to 2 to 1 times, from the original milking every day to 1 day, 2 days, 3 days to 5 days, and finally no milking. Rapid stop method refers to the method of stopping lactation within 4-6 days. From the time of stopping the milk to 1 day, it is squeezed twice and then squeezed once a day. After the milking on the 6th day, it is no longer squeezed. In order to prevent the occurrence of mastitis, antibiotic ointment and other drugs are injected into the breast when the breast is stopped. Some cows produce more milk and do not easily stop the milk. In this case, the amount of feed for concentrates and succulent feeds can be reduced, while drinking water can be restricted and hay feeding can be increased.
2. There should be a period of time during the dry period so that the digestive tract has a chance to recover. Excessive amounts of concentrated feed have a considerable stress on the rumen. For this reason, the amount of roughage, especially hay, is increased.
3. Two weeks before delivery, make preparations for cow delivery and the next lactation period. First, to prevent the occurrence of postpartum ketosis, 8-8 days before delivery, plus 4-8 grams of niacin, once a day orally, even for 8 days. The second is to prevent postpartum expectoration, you can take 7 days before delivery with vitamin D31000 units, intramuscular injection, once a day, even for 7 days, you can also adopt scientific feeding, that is, before calving. The third is to prevent the retention of placenta, and intramuscular injection of progesterone 100 mg every day before delivery.
4. Dry cow recommended feed formula: 9% rapeseed meal, 9% cotton seed cake, corn 71% wheat bran 10%, premix 1%.
5. Dry milk should limit the amount of concentrate feed. Excessive amount of concentrated feed during dry period is not only unfavorable for high yields, but it will also cause adverse effects on dairy cows. It is manifested in the following aspects: impaired digestive function, body fat accumulation and obesity, increased incidence, consumption of refined feed. The amount of concentrate feed for dry milk is generally 3-4 kg per day.
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