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Dairy cows have principles for supplementing oils
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 dairy basal diet itself contains about 3% of fat, so the supplement should be 3% to 4%. Calculating the amount of fat to be added to accurately determine the amount of fat the 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. 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 production. For example, the use of soybean as the only fat in the diet will cause an excess of degradable protein in the rumen, affecting the feed intake of the cow. When the amount of cottonseeds is more than 3.6 kg per day, gossypol poisoning occurs in dairy cows, leading to visceral bleeding and decreased reproductive performance. Therefore, different oils should be selected according to price, utilization and dietary requirements. At the same time, it should be noted that liquid oils are not suitable for the feed of lactating cattle. Pay attention to the interaction between oil and fat. When adding fat, 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 mainly used as a forage, and cotton seeds can be added to the feed. Gradually increasing the amount of fat and oil fed to the fat can avoid poor palatability. He began to feed 1/3 first, and fed the whole amount in 3 stages. It took 3 to 4 weeks.