Raising dairy cows, breeding calves, and prolific milk are an extremely important part of cattle production. The breeding of dairy cows is the basis of breeding, and raising the conception rate is the key to breeding.
I. Reasonable feeding and management
In order to ensure the normal breeding of dairy cows, cows must meet the needs of protein, vitamins, and calcium, phosphorus and other minerals in terms of feeding and management. Diversification of feed types, winter and spring green and juicy feed and quality hay must ensure that the supply, and timely supply of a certain amount of salt, bone meal and enough clean warm water to prevent malnutrition during yak. After the yak is born, sufficient fresh milk must be given so as not to hinder the growth and development of the yak and affect the normal development of the reproductive organs. Long-term nutritional deficiencies in bred cows can delay the puberty and affect pregnancy. Before cows are exposed to lochia, they should not be given more concentrates to avoid affecting reproductive organs and normal estrus after birth. Exercise and sunbathing play an important role in strengthening the development of cows at various stages and improving the reproductive performance of cows. The cowshed needs to be cool in winter and cool in summer, with air circulation and good drainage to ensure the health of cattle.
Second, young cows should be suitable for age breeding
1. Correctly grasping the initial mating age of cows can not only exert individual production performance and breeding ability, but also have an important role in improving the quality of future generations of cows. The average cow is initially assigned to 16-18 months of age and weighs 350 kg. The premature mating of cows not only affects their own growth and development, but also the calf born is of small birth weight and is of weak constitution and is prone to dystocia.
2, understanding the law of estrus, grasp the timing of mating, grasp the objective law of cow estrus, timely breeding, is the key to improving the conception rate. "If you want to be quasi, the heat must be stable." Accurately grasping the timing of breeding has an important role in improving the conception rate. The first estrus occurs 45 to 60 days after the cow is born. The estrus interval is usually 18 to 21 days. Cows are more irritated than usual, squawking, not quiet, willing to close to other cows or bulls, and take the initiative to climb.
Third, make a cold match, to avoid indiscriminate allocation
In order to improve the utilization rate of excellent bulls, to speed up and expand the transmission speed and scope of good genetic traits, and to avoid unlawful allocation. For bulls that are not suitable for breeding purposes, they should be cast off or managed separately to prevent unlawful matches and close relatives from mating. When using frozen semen, attention should be paid to the species, name, and lot number of the bull, and records should be made that the number of spermatozoa containing linear motion should not be less than 1,500.
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