In the early stages of pregnancy, the nutritional needs of cows did not differ significantly from those before mating. Cows entering mid-pregnancy (4-5 months of pregnancy) may be allocated a diet based on the nutritional signatures of dry cows. By the sixth month of pregnancy, due to the rapid development of the fetus and the need to store some nutrients in the mother's province prior to lactation, its nutritional needs are very different from before, and some concentrates can be added to increase the nutritional value of the diet by about 10%. However, cows should be prevented from becoming obese at the end of their pregnancy, resulting in dystocia or other conditions. Early pregnancy cattle can maintain a medium body condition.
In the 30 days before delivery, first-time pregnant cows can appropriately increase the amount of feed on the basis of feeding marks, but the amount of feed should not exceed 1% of the weight of first-infant cows; at the same time, vitamins and calcium should be added to the diet. Phosphorus and trace elements.
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