The lactation period of dairy cows is generally 305 days, but in production, some dairy farmers have milked milk from milking to no milk. This practice causes cows to over-consume nutrients in the body, making it more difficult for the cow to conceive, and thus affecting the increase in milk production. Therefore, milk must be milked during the lactation period of dairy cows and there must be a certain period of dry milk so that the cows have enough time to supplement their physical strength and loss of nutrition.
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