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1. The production cows should be derived from excellent cows, and the mother's milk yield should not be lower than the group's milk production; finally, the breeding breeder's cows can be put into production using the breeding value.
2. The cow is well developed and has good body shape, which is in line with the characteristics of the variety and has no obvious defects;
3. Individuals whose families have no genetic diseases;
4. The initial age is controlled to more than 70% of the adult body weight; prematurely adjusting the age of the early-stage cow will hinder the growth of the cow, and the calf will also be affected.
5. From a physically strong mother, the reserve cow has strong physique, strong resistance and disease resistance.
Only careful selection of the maternal parent can guarantee the milk yield of the group and the quality of the offspring, so as to increase milk yield and quality.
High-yield dairy cow mother selection technical points
There are large differences in the offspring of dairy cows in Fengyi Town, and the poor uniformity of the population affects the average milk production level of the group. Therefore, it is also necessary to strengthen the selection of cows while strengthening bull selection; the production of cows is not only related to their own milk production. , also affect the quality of future generations, the technology is as follows: