How many calves can a cow give birth to in her life? What are the main factors affecting the annual calving rate of cows?

Cattle can not only help people to carry out agricultural production, but also meat and milk can provide nutrition, with great economic benefits. So how many calves can a cow give birth to in her life? What are the main factors affecting the annual calving rate of cows? Let's learn more about it.

How many calves can a cow give birth to in her life?

The main results are as follows: 1. heifer generally has its first estrus at the age of 6 ~ 12 months, when the duration of estrus is short, the cycle is abnormal, and the reproductive system and its function are still in the stage of growth and development, which is not suitable for calf breeding. Males and cows already have fertility during the sexual maturity period from 8 to 12 months old, but at this time the body is in an exuberant stage of growth and development. if mating and conception, it will affect their growth and development and future breeding, and shorten their utilization years. The vitality and production performance of offspring are also low. Therefore, it is not suitable to breed at this time.

2. In general, the growth of cows is basically completed at the age of 2 to 3 years old, reaching the mature stage that can be mated. According to experience, the first mating age is 1.5-2 years old for female yellow cattle, 2-2 years old for male yellow cattle and 1.5-2 years old for imported bulls and cows. It should be based on the growth and development of the individual, taking the adult cattle as the standard, when the body weight of the individual reaches 65% to 70% of that of the adult, the body height reaches 90%, and the chest circumference reaches 80%, the initial mating age is the best. The average cow normally gives birth to two babies in three years. Once in a while, there's one having one child a year.

What are the main factors affecting the annual calving rate of cows?

1. Age and weight at puberty

2-year-old calving young cows should reach proestrus before 14 months of age and go through one or two estrous cycles before mating. First-born cows need enough nutrition to reach the standard weight needed for mating. When the body condition score is 5, the standard weight of a cow during the mating stage should be 60% to 65% of its adult weight. When mating, the body condition score of the reserve cow should not be less than 5 points, and finally 6 points. Compared with purebred young cows, hybrid young cows reach proestrus earlier and weigh slightly less.

2. Breeding of first-born cows

If conditions permit, the breeding farm will adopt the estrus synchronization technique for the reserve cows and breed them 2 weeks earlier than the parturient cows.

3. Feeding of first-born cows

The feeding of first-born cows during pregnancy should be scientific and reasonable, and the body condition score should reach 5 to 6 points during calving. If the feeding restriction is carried out on the newborn cows, the body condition score will be reduced, the interval of postpartum anestrus will be prolonged, and the mortality of calves may be increased.

4. The ease of calving

Dystocia is the main cause of death of born calves. Too much birth weight of calves can easily cause dystocia. The most effective measure to regulate the birth weight of calves is to choose a suitable male parent. Compared with parturient cows, dystocia occurs more frequently in 2-year-old cows. Therefore, the selection and management measures of bulls are particularly important.

5. Interval between reestrus after delivery

The score of comfortable body condition during delivery is mainly affected by nutrition, milk production level and adult weight. The result of body condition score plays a guiding role in the feeding and management of postpartum interval. The implementation of early weaning can help cows improve their health scores before winter and ensure that early weaned calves receive an adequate supply of roughage. At the level of one birth a year, the interval between weaning cows is only 70 to 90 days at most. Practice shows that the calving stage of about 70 days is the most favorable.