1. The fat and oil should be fed in an amount appropriate to the maximum amount of oil in the diet of the dairy cow not exceeding 7% of the dry matter in the diet. Under normal circumstances, the basic dairy cow diet itself contains about 3% of fat, therefore, the amount of supplement should be 3% to 4%. 2. Calculate the amount of oil to be added. The exact amount of fat that a cow needs depends on the amount of fat. If a dairy cow produces 36 kilograms of fresh milk per day, and the butterfat ratio is 3.5%, then the fat content per day is 1.26 kilograms. If the cow's normal body condition and continuous production level are maintained, 1.26 kilograms of fat should be added to the diet. 3. Feeding fats from different sources and types The effect of adding fats to the feed of dairy cows depends on the source and type of fats. Therefore, do not use only one fat in the production. At the same time, liquid oil is not added to the feed of lactating cattle. 4. Pay attention to the interaction between oil and fat. When adding oil, consider the type of roughage that makes up the diet. When silage corn is used as the main forage, only the addition of sheep and beef can increase milk production. The wolfberry is used as the main forage and cottonseed cake can be added to the feed. 5. Gradually increase the amount of oil fed to grease to avoid poor palatability. He began to feed 1/3 first and fed the whole amount in 3 stages. It took 3 to 4 weeks.
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