What should cows do with high temperature asthma in summer?

The milk production characteristics of high-yield dairy cows are: compact body, thin fur, delicate head and neck, thin bones, obvious edges and corners, developed breasts, bathtub-shaped breasts, symmetrical breasts before and after, and curved and equal breast veins.

Improve the diet structure of dairy cows

Appropriately improve the diet structure of dairy cows. In summer, hay should be fed as little as possible to reduce the amount of roughage. Increase the content of protein and fat in the diet, and appropriately increase the content of corn, bean cake and fish meal in the compound feed, so as to increase the protein concentration by about 4% compared with the normal level. You should also feed more green and juicy feed, such as high-quality grass, carrots, potatoes and so on. Rich in carbohydrates and a lot of water, it is not only palatable, but also quenches thirst, which is very beneficial to heatstroke prevention and cooling, and relieves the heat stress of dairy cows.

In addition, concentrated feed can be made into porridge. The porridge has good palatability, can increase the feed intake of dairy cows, and is beneficial to the digestion and absorption of dairy cows, thus greatly improving the effective utilization rate of feed.

Improve the feeding time of dairy cows

When the temperature is high at noon in summer and the appetite of dairy cows is low, the feeding time should also be adjusted. In the hot season, at night and early morning when the temperature is low, the intake of dairy cows accounts for 75%-80% of the whole day intake, so it is best to add more feed in the morning and evening to improve the intake and meet its nutritional needs.

Improve the living conditions of dairy cows

Greening the environment and improving the microclimate of the site. Increase site greening and absorb solar radiation through plant transpiration and photosynthesis; Reduce radiation by shading; Through the moisture maintained by the roots of plants, a lot of heat energy is absorbed to cool the air, and at the same time, the ground temperature is lowered, so that the heat radiated to the roof, external walls, doors and windows is reduced, and the sunlight is blocked from penetrating into the room through the shade of trees, thereby reducing the indoor temperature.

Strengthen the heat insulation and ventilation design of cowshed. In the design of cowshed, we should pay attention to the design of doors and windows inside the cowshed, try to build an open or semi-open cowshed, reduce the structure that blocks ventilation, and keep the solid core wall. At the same time, choose materials with low thermal conductivity to strengthen the heat insulation of roof and wall. Secondly, for the external structure, especially the roof, it is of certain significance to use light-colored building materials to alleviate the influence of strong sunlight on the house.

Necessary cooling equipment and measures. You can cool the cows by spraying and relieve their heat stress. Use sprinklers or drilled water pipes to spray water on cows. Generally, it is sprayed automatically every 5 minutes to 10 minutes, lasting about 30 seconds each time, and then blown alternately with a fan for 3 to 5 minutes.

Other comprehensive prevention and control measures

Use anti-pressure additives. Anti-stress additives can strengthen the nutritional value of diet, improve utilization efficiency, increase milk production and improve dairy cow metabolism. Rich in nutrients such as riboflavin, nicotinic acid, magnesium, potassium and chromium. Adding100g-115g/day of potassium carbonate to each head in summer can minimize the negative impact of heat stress on dairy cows. In addition, adding organic chromium can reduce the concentration of cortisol in serum of dairy cows and improve their anti-stress ability.

Insect repellent and health care. After delivery, cows should take 70 mg of thiabendazole per kilogram of body weight to drive away parasites in cows. Spraying 1%- 1.5% trichlorfon solution or other efficient and non-toxic pesticides in the cowshed and its surrounding environment can effectively prevent mosquito and fly bites. Fly-killing lamps can also be installed around the cowshed and its sports ground, which can generally increase milk production by about 10%.

Precautions:

Feed mung bean soup. Mung bean soup has the functions of clearing away heat and toxic materials, heatstroke prevention and cooling. Use fresh mung beans 1 kg-1.5 kg, add 4 kg -5 kg of water, boil 1 h -2 h, and add 40 kg of clean drinking water to the cows once a day.

Heat stress will lead to the decline of milk production performance, reproductive ability and immunity of dairy cows. Only by improving the comprehensive protective measures such as feeding management environment and feeding technology can the heat stress of dairy cows be effectively alleviated. Minimize the impact of heat stress on dairy production, reduce the economic losses it brings to farms (households), and ensure the breeding benefits.