For cows, the optimum temperature is 8-16°C. In most parts of northern China, winter temperatures are below 0°C, coupled with poor feeding and management, milk production will be affected. The measures to change this effect are as follows: The suitable ambient temperature for raising Sherwin cows is generally 8-16°C. Within this range, the cow's metabolic rate and heat production are at the lowest level. The performance is: low feed consumption and low incidence. If the temperature of the barn is below 0°C, the cattle will emit a lot of energy to maintain body temperature. Therefore, it is particularly important to keep the appropriate temperature of the cows in the cold winter. The doors and windows and wall joints on the west and north side of the cowshed should be blocked tightly to prevent the cold winds from invading. The doors and windows on the sunny side should be hung. Raising the feed standard The rumen fermentation of dairy cows and the energy generated by them are diverted to maintain body temperature. The nutrition of cows for maintenance and production also increases correspondingly, which is generally 10-15% higher than the standard for raising dairy cows. Therefore, it is necessary to increase 15% of the mixed concentrate in the winter so as to maintain or increase milk production. Drinking warm water in winter cows eat more hay, increased secretion of digestive juice, only saliva secretion of about 50 liters per day, if you can not fully drink water, appetite will drop, resulting in decreased milk production, or even disease. Cows need about 5 kilograms of water for every 1 kilogram of dried feed. Therefore, the total amount of drinking water can not be less than summer. According to reports, drinking milk at 8.5°C in winter cows is about 8% higher than drinking water at 1.5°C. However, drinking milk at 20°C for a long time will weaken the body and reduce the digestive capacity of the stomach. The suitable temperature for dairy cows to drink in winter is: 12-14°C for adult cows, 15-16°C for pregnant cows, 35-38°C for calves. Topping up salt is one of the main components of gastric juice. As the secretion of gastric juice from cows increases in winter, the demand for salt also increases. If the salt intake is insufficient, the appetite of dairy cows will decrease and the milk production will decline. The daily supply of salt should be determined by the size of the cow's body weight and the amount of milk produced, generally 50-100 grams per day. In addition to mixing 1% of dietary concentrate, a salt tank can also be set up to allow cattle to feed freely. Intensive sports cows are kept in the winter for a long period of time in a house where there is not enough light and the air is not fresh. This will not only reduce milk production, but also lead to some diseases.
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