The quality of yak cultivation is directly related to the success or failure of dairy cows. According to the growth stages of dairy cows, we call cows born to 6 months old as calves. Yak resistance is relatively poor, it is easy to get sick, not good management, especially in summer and winter more incidence, mortality is high, the mortality rate can reach 50%, mainly digestive tract disease, gastroenteritis, diarrhea, etc. There are three main reasons: First, congenital factors, the mother lacks vitamins (such as feeding dry stalks for pregnant and nursing cows, more cottonseed cakes, feeding green fodder, less carrots); second is acquired factors, newborn yak The colostrum should not be eaten within two hours. Third, after the yak was born, it was due to poor management and gastrointestinal pathogen infection. Prevention of diarrhea in calves from the following three aspects, first, to increase the amount of green feed for pregnant cows and lactating cows, such as increased barnyardgrass, silage, hay, carrots, etc., to reduce dry corn and cottonseed cake feeding Feeding quantity is forbidden to feed moldy grass; secondly, the newborn yak should eat colostrum within two hours after birth. Yak is not afraid to eat colostrum as soon as possible. The earlier the better, the initial feeding amount is 1kg-2kg. , According to the size of the calf increase or decrease; third is to master the calf feeding method, calf feeding to master the three set, that is, regular, fixed temperature, quantitative. Timing: Feed 3 times a day, 7 o'clock in the morning, 2-3 o'clock in the afternoon, and 1 o'clock at 9 o'clock in the afternoon; Fixed temperature: Keep the milk temperature between 38 o C and 40 o C, feed milk after being squeezed, and warm water in winter. To 40 °C, or to boil the milk to 40 °C; quantitative: should not be less, morning 2 kg -2.25 kg, 1.5 kg in the afternoon, night 2 kg -2.25 kg, the amount of feeding increases with age, not more than 7.5 kg. If diarrhea occurs in yaks, it is possible to use drugs such as diarrhea hemorrhoids, furazolidone, and sulfamethoxazole. The dosage can be controlled by the range of medications used by adults. If the diarrhea is severe, dehydration may require infusion. There are two things to be aware of when feeding calves: First, the calves are prevented from adding soybean meal and cornmeal to their milk. The second is not to add water to the milk, to drink after half hour -1 hour, water temperature 20 °C -40 °C, summer should drink more water, calf water shortage, can cause an excessive drinking water, hemolysis, resulting in hematuria. Calves can grow to 5-8 days of age to guide the start of food, 15-30 days of age is safe, can give appropriate amount of hay, do not feed straw. Introduce a calf feed formula for reference: Bean cake 18% Wheat bran 20% Sorghum 10% Corn 47% Bone meal 1.0% Calcium phosphate 2.0% Sodium bicarbonate 1.0% Sodium chloride 1.0% Calf compound feed is free to eat daily Feed intake generally does not exceed 1 kilogram, which can be flexibly controlled according to the individual size of the calf. The calf's feeding period can be fed for two months, and the feeding time can be controlled according to the milk production. Talk about calf weaning: calves weaning is quite critical, successful weaning is directly related to the success or failure of calf feeding, safer in the spring and autumn, summer and winter season easy to digestive tract infection, catching cold, causing diarrhea. It is generally about 50% off a week, or feeding the porridge, and gradually weaning it takes about two weeks. In the breeding process of yak, the quality of the milk should be guaranteed. There should be no milk or solidified milk in the milk. It is best to use milk for self-produced milk. Observe whether or not the yak has an abnormal condition, especially observe it in the morning. The yaks need to be sunny, ventilated, and advocate a single cow's lap to prevent bite damage. Cowhouse suitable temperature 10 °C -25 °C, winter can be covered with plastic sheeting, summer in the shade of trees and other ventilation, yak foot grass should not use straw. Keep cleanliness in the barn and sports grounds, eliminate mosquitoes and mosquitoes in summer to prevent transmission of diseases. Yak venues should avoid sharp objects such as razor clams, razor clams, and razor clams as well as woven fabrics, woven bags, plastic bags, etc. to avoid unnecessary injuries and diseases. During the breeding and management of yak, we must also pay attention to epidemic prevention of infectious diseases and vaccinate on time, such as foot-and-mouth disease, Pasteurella, Clostridium perfringens, Japanese encephalitis, etc., in order to ensure the successful cultivation of yak and lay a foundation for the breeding of cows. .