In the early spring, when it is warm and cold, it is at a time when green feed is scarce. Silage and crop stalks are the main source of roughage for dairy cows. Silage has the advantages of reducing the cost of feeding, good palatability, improving the utilization rate of crop straw, easy digestion, convenient preparation, durable storage, and can promote the production of dairy cows. Because the silage is produced by fermenting lactic acid bacteria under the conditions of sealed and anaerobic crop straw, if it is improperly taken and fed, it can easily lead to deterioration of silage and cause cow poisoning and disease.
Therefore, the spring cows must pay strict attention to the following four points when feeding silage: Quality assurance When using silage, high quality silage must be used. High-quality silage is greenish green or yellow-brown. The smell is savory and the texture is soft and moist. The veins and villi on the stems and leaves can be seen. For dark or dark brown in color, odor in smelly acid, even moldy, rotten, and deteriorated silage, do not feed the cows. If these silages are fed, they will cause diseases in the digestive tract of dairy cows. If these feeds are eaten by pregnant cattle, they will also cause miscarriage.
When taking silage strictly, it must be opened from one end of the silo, layered from top to bottom in accordance with a certain thickness, and keep the surface flat. To prevent mixing of the soil, avoid digging through a hole. It is advisable to take the amount of each day for feeding one day. In spring, the weather gradually warms up, the propagation speed of harmful microorganisms accelerates, and the contact time between silage and air is long, which can easily cause mildew and deterioration of silage. Therefore, after the silage is taken out, the silo entrance should be closed immediately to prevent excessive air in the silo.
The amount of silage used for feeding has a certain sour taste. Some cows may not be accustomed to the initial feeding, and they should follow the principle of decreasing the amount of silage. Mix with other concentrates or hay, put the silage less for the first time, then gradually increase the amount and feed it on an empty stomach to allow it to gradually adapt. Because silage contains a large number of amino acids and has a laxative effect, it is not advisable to feed more females during the later period of pregnancy and stop feeding for 15 days before birth. In general, calves are fed silage after weaning. The daily feeding amount of silage for adult dairy cows is preferably 20 kg to 25 kg, and the calves after weaning range from 5 kg to 15 kg. As the amount of green feed is gradually increased, the amount of silage fed can be appropriately reduced.
Clever mix silage is a kind of high-quality roughage, but it must be scientifically matched with the fine feed according to the actual needs of the cow to improve the utilization of the feed. In terms of ingredients, the feed ratio of dairy concentrates and silage (moisture content) is reasonable in the range of 1:3 to 1:3.5. If the silage acidity is large, 5%~10% baking soda or 1%~2% lime water can be added to the feed, rinsed and fed to reduce the acidity, increase the palatability, and promote digestion and absorption.
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