Summer temperatures are above 30°C for up to 3 months. Under such a high temperature environment, the milk production rate of dairy cows is likely to decrease and the economic benefits will be reduced. First, the analysis of the causes of milk production rate 1. Heat stress. In addition to temperature, temperature, airflow, and solar radiation can all cause heat stress in dairy cows. Heat stress manifested as sweating, increased drinking water, increased body temperature, and increased respiratory rate. Longer times led to decreased feed intake, decreased milk production and reproductive rates, and significantly reduced non-fat solids in milk. 2. Mosquitoes bite. Not only does it make the cow uneasy, it affects the feeding and rest, but it also spreads the disease. 3. The stadium is muddy. Cows often stand up and move in muddy waters, consume large amounts of energy, and their energy intake is less than that of other seasons and they are prone to foot disease. 4. Dry matter dropped in the diet. In summer, cows eat grass or melon leaves gradually increase. The higher water content (usually 80% to 90%) in grasses and melon leaves makes the dry matter quality of dairy cows relatively less. 5. The incidence of mastitis is high. As the outside temperature increases, bacteria multiply quickly, and cow mastitis increases. The usual incidence rate is no more than 5%, and the incidence of mastitis in individual groups in summer can be as high as 60%. Second, the main measures to increase the milk production rate 1. Summer cooling. (1) Afforestation. Tree shades can be planted around the playground to reduce solar radiant heat by 30% to 40%. (2) Build a arbor. This is mainly for outdoor scattered cattle. The arbor should be built in a place with high dryness and cool air. It is usually set on the north-south long axis and is 3 to 4m high and 5 to 6m wide. The roof material can be used to select straws and pastures with good insulation properties. Materials with low emissivity can also be used. When asbestos plates are used as the top, they must be on the surface. Apply a coating with high reflectance or a double-layer plate structure that is left blank in the middle of the top. (3) Sprinkle showers on cows. Open the north and south doors and windows of the cowshed for ventilation and turn on the fans to speed up the flow of air in the houses. When it is impossible to solve the problem of heat dissipation of the cow by turning on the fan, a spray head can be installed on the top of the cowshed to shower the cow. Water spray can also be used with fans. (4) Give the cow cold water. It is best to take water from a deep well or a water pipe. Drinking cold water 3 to 4 times a day, the water quality requirements are clean and fresh. (5) A reasonable mix of rations. Increase energy and protein levels in dairy cow diets, typically by 10% to 12%. For the high-yielding dairy cows, the proportion of concentrate 60, coarse material 30, and dregs 10 can be used as the dietary structure. If the quality of the coarse material is good, the dietary structure can also be changed to fine:rough = 60:40. (6) Adjust feeding time and feeding method. Should choose to increase the amount of feed at night, accounting for 60% to 70% of the daily diet. Feeding should be carried out in a less-than-medium manner. Dairy cows during the prolific lactation should add 1.0 to 1.5 kilograms of fine material per 100 kilograms of body weight in summer and be fed 4 times a day. Green and succulent feeds can be fed to 35 to 15 per day. 45 kg. (7) Supplement potassium salt. With the addition of potassium salt, the intake of dairy cows increased and the milk production increased. In addition, supplements to sodium, calcium, and magnesium must be appropriately increased. 2. Elimination of mosquitoes and flies to prevent the spread of the disease. Can be added in the barn screen screens, can also be used 90% trichlorfon 600 ~ 800 times sprayed cattle body to repel mosquitoes. To kill mosquitoes once a week. When it comes to eliminating mosquitoes and flies, it is best to choose on a rainy day. In order to eliminate mosquitoes and flies, cattle farms should remove weeds, flatten potholes, do a good job of drainage systems, eliminate dead ends, and clean up excrement in time. At the same time, the cowshed should be cleaned 1 to 3 times a day and disinfected once a day. 3. Set a hard ground sports field. Set hard ground and have a certain slope so that the rain can be drained in time to prevent the cows from living in mud. 4. Adjust the diet and feed it properly to maintain the dry matter ratio in the diet. The dry matter in the diet is generally required to be about 3% of the cow's body weight. In order to achieve this level, one should increase the amount of concentrate feed (3.5 to 4.0 kg of feed can be maintained, 3:1 for dairy products, such as dairy cows with a daily output of 15 kg, and 8.5 to 9.0 kg of concentrate can be given each day); The second is to properly increase the proportion of protein in the diet, reduce the proportion of crude fiber, to fine coarse; third is to ensure that the amount of hay fed is not less than 3 kg per cow per day; fourth is to feed more high-quality green and blue juicy feed. 5. Reduce the incidence of mastitis. There should be no items in the playground that are easily punctured and break the cow's breast. When milking, it is necessary to pay attention to early detection of mastitis and timely treatment; after milking, the teat should be soaked with Disinfectant. In the event of mastitis, in addition to medication, cold and hot compresses and milking techniques are economical and simple. 6. Provide plenty of clean drinking water. The amount of drinking water of cows is related to the outside temperature, milk yield, individual, breed, and age. Under normal circumstances, the daily output of milking cows is about 100 liters. Therefore, in addition to drinking water in the trough after feeding, a drinking trough should be set up at the sports ground so that the cows can freely drink water to ease the “heat stress†response. At the same time, 0.5% salt can also be placed in drinking water to promote the metabolism of dairy cows. Ningbo DOKEE Medical Technology Co., Ltd. , https://www.dokeemedical.com