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Dry milk technology for high-yielding dairy cows
1 Determining dry milk time Drying time depends on the cow's expected date of birth and the length of dry milk. Dairy dry milk is generally 50 to 75 days. Early mating cows, lean-bodied cows, older cows, high-yield cows, cows that have been difficult to stop milking, and cows that are not well stocked may have a dry period of about 60 to 75. For days, cows with good sensation and low milk production can be shortened to 45-50 days. However, the shortest duration of dry cows should not be less than 42 days, otherwise it will affect the milk production of the next baby and the health of the cows. 2 Adjust feeding plan in advance. One week before stopping milk, adjust the cow feeding program, mainly feeding some hay, fine material and part of the silage, and change free drinking water to regular quantitative drinking water. At the 3rd day of stopping milk, adjust the feeding program again according to the milk production of the cow. At this time, if the cow's milk production is still very high, all fines should be subtracted; if the milk production is not very high, but the daily milk is still more than 10 kilograms, some fines may be properly deducted, and the milk production on that day is lower than At 10 kilograms, the fine feed can no longer be adjusted, but the amount of drinking water should be appropriately limited to the cow. 3 Adjusting management measures While feeding the juicing material, the number of milking can be changed from the original 3 times daily to 2 times daily, and then continue to adjust according to the decline in milk production. When the milk production on that day falls below 10 kg, it can be changed to milking once a day. At the same time, the daily cow exercise time can be appropriately increased to increase consumption and exercise constitution. In addition, measures such as changing milking time, milking locations, feeding times, and reducing breast massage can also be used to cause unpleasant stimulation to the cows and disrupt the milk reflections formed during normal milking. 4 Squeeze the last time the milk reaches the day of dry milk, scrub the breasts, massage carefully, completely squeeze the milk in the breast, then soak the nipples with 1% iodophor, and then inject the dry cream into each nipple Or other dry milk needles. After the injection, soak the nipples with 1% iodophor. 5 Observe changes in the breast When the above operations are completed, the changes in the cow's breast must be carefully observed. Under normal circumstances, the breast is significantly inflated in the first 2 to 3 days, and the accumulated milk is gradually absorbed after 3 to 5 days. The breast volume is approximately 7 to 10 days. Obviously smaller, the internal breast tissue becomes softer. At this time, the cow has stopped lactation and has stopped milking successfully. 6 Precautions 6.1 Pay attention to keeping the breast clean In the process of dry milk, the cow's breasts are inflated and even become slightly inflamed and swollen. It is very easy to infect the disease at this time. Special care should be taken to keep the breast clean and hygienic. Keep the barn clean and dry, and change the bedding to prevent the cow from lying on the dirt and excrement. 6.2 Observe that most cows do not have adverse reactions during the observation of the reaction of cows to dry milk, but there are also a few cows with fever, irritability, loss of appetite and other stress responses. Attention should be paid to observation, timely detection, and timely treatment to prevent Send other diseases. For severely reacting cows, symptomatic treatment with intramuscular sedatives and broad-spectrum antibiotics can be used. 6.3 Prevention of breast damage During dry milk, if there is severe swelling of the breast, redness of the breast surface, fever of the cow, fever of the breast, etc., if you do not insist on milking, the breast will swell. In this case, dry milk procedures should be suspended, milk from the breasts should be squeezed out, anti-inflammatory treatments and massage should be performed on the breasts, and after the inflammation disappears, dry milk should be used again. 6.4 Strengthen the management of dry cows to share with large groups of dairy cows, prohibit massage, collision, touch the breasts, maintain a good breeding environment, keep the cowhouse air fresh, summer heatstroke, winter cold, freeze fed feed, winter drinking water is not low At 10-12°C, it prevents cows from becoming ill, resulting in failure of dry milk or abortion of cows.