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The implementation of coarse matching of feeds and feeding of feed in groups is the material basis for dairy cows. In developed dairy cows in developed countries, dairy cow diets generally consist of 1/3 for silage corn, 1/3 for alfalfa hay and 1/3 for supplemental concentrates. In China, the ratio of dietary crude to crude of cows is generally 40:60, and that of partial concentrates is 60:40. Some farmers use too much of the fine material, resulting in frequent metabolic disease of dairy cows, so it is more suitable for rough type, crude fiber content of cattle should account for 15% to 24% of dry matter, and roughage should have 2 More than one. Dairy cows should be reared in groups. Farmers should adjust the herd according to the milk production level of the cows and divide the high-, middle- and low-yield groups to separate them. This can provide reasonable feed remuneration according to the nutritional requirements. Prevent and treat Common diseases and extend the useful life. The average age of dairy cows is not long, and the majority of them are forced to be eliminated because of cow disease. In addition to epidemic vaccination and tuberculosis quarantine for dairy cows every year, cattle farmers also have to focus on the immunization work of several common and more harmful diseases. Mastitis In addition to lowering the milk production and causing damage to the mammary glands of cows, it is also possible to reduce the milk quality (creams, milk proteins), somatic cells, chlorides, and milk bacteria. Therefore, cattle farmers must strengthen the health of their cattle beds and cattle body, and use the teat nipples before and after milking. They must adhere to 1 or 2 subcutaneous mastitis tests every month, especially during the dry period. Metabolic disease This disease often occurs in high-producing dairy cows during perinatal and lactation periods, mainly due to inadequate nutrient content (mainly sugar), poor dry milk management, and unreasonable diet mix. The general incidence of limb and foot disease accounts for about 10%, which seriously affects the normal activities and health of cattle. The main causes of morbidity are unbalanced diets, poor quality of roughage, excessive moisture in the cattle bed, frequent flushing of the body with water, no prompt hoof repair, and genetic factors of the bull. Choose good breeds and improve breeding ability. The bulls selected by farmers need to have a clear source of origin, a body appearance of more than 88 points, production performance and improvement effect, that is, more than TPI1500. At the same time, they must observe and identify the appearance of their offspring and production performance. The bull that has made a significant improvement will continue to expand its use. This is an important way to establish and expand the improved Seed system. At the same time, farmers need to master the estrus law of cows, and use frozen semen to make timely breedings to ensure that the conception rate of cows is more than 60%, and the calving interval is 13 months. One good breed of cattle is produced each year to improve the efficiency of dairy cow breeding. .