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Keeping the cows undernutrition will cause serious cow weight loss and will reduce the cow's conception rate. If protein nutrition is lacking, the amount of blood is greatly reduced, so that the supply of nutrients to the pituitary gland and ovary is insufficient, and the secretion of hormones is reduced, so that the cow cannot be in normal oestrus.
High-quality semen must have good quality semen, and the sperm motility before freezing should not be less than 0.6; the activity after thawing should not be less than 0.3, and the frozen semen should be thawed at the time. It is best not to exceed 1 hour at that time.
Timely insemination to grasp the infertility "heat", the mother's steak time is generally 7 to 10 hours after the termination of estrus, 0 to 12 hours before ovulation, that is, within 3 to 4 hours after the end of estrus.
Mastering the insemination technique must use the rectal grasp of the insemination method, and the insemination site should reach about 5 cm deep in the cervix.
Strict operation must be strictly in accordance with the operating procedures, with special attention to hygienic conditions such as washing and disinfection of the vas deferens, disinfection of the thawing liquid, disinfection of the genital area of ​​the cow, etc., and no one aspect can be ignored.
Pay close attention to compound early pregnancy to check the cows, generally 18 to 20 days after insemination, 30 days each pregnancy test, preferably in 40 days to do once, if it is determined that there is no pregnancy, the cause should be identified as soon as possible, Take corresponding measures and check the situation to improve the overall conception rate.
Improve skills for cold cattle
To improve the cold allocation rate of cattle, focus on the following six aspects: