Method for inducing high-yield dairy cow to regularly ovulate and increasing conception rate

Abstract

The invention provides a method for inducing a high-yield dairy cow to regularly ovulate and increasing the conception rate. The method includes the steps that 1, 35-40 days after the high-yield dairy cows calve, a progestational hormone device is embedded into a dairy cow vagina for the first time; 2, the progestational hormone device is taken out after being embedded for 14-16 days; 3, prostaglandin is injected; 4, 2 days after the prostaglandin is injected, an ovulation promoting hormone is injected; 5, 12-16 hours after the ovulation promoting hormone is injected, artificial insemination is carried out; 6, on the sixth to eighth day after artificial insemination, the progestational hormone device is embedded again, and the further embedding time ranges from 14-16 days. According to the method, the development and ovulation time of follicles in the ovary of the dairy cow can be regulated, detection of oestrus is not needed, artificial insemination is directly carried out, fetus protection medicine is adopted, and the survival rate of embryos is increased. The defects that oestrus of the high-yield dairy cow is not easy to observe is overcome, the oestrus rate and the conception rate of the dairy cow can be increased, the calving interval of the high-yield dairy cow is shortened, breeding benefits of the high-yield dairy cow are increased, and production management of a dairy cow farm is convenient.

Description

technical field [0001] The invention relates to a livestock breeding method, in particular to a method for inducing high-yielding milk cows to ovulate regularly and improving conception rate. Background technique [0002] At present, artificial insemination technology is mainly used in the breeding of dairy cows in my country. Compared with natural mating, artificial insemination technology can reduce the spread of diseases and reduce the cost of reproduction. Interchange and trade, instead of the introduction of breeding males. When carrying out artificial insemination, it is necessary to do a good job of accurate estrus identification. At present, estrus identification is mainly determined by observing or monitoring the estrus performance of cows. However, with the continuous improvement of milk production of dairy cows, the symptoms of estrus are not obvious, that is, quiet estrus. According to the survey, quiet estrus accounts for about 10%-20% of estrous dairy cows (Z...

AI Technical Summary

Problems solved by technology

According to the survey, quiet estrus accounts for about 10%-20% of estrous dairy cows (Zhang Guilan et al., 2012, Heilongjiang Animal Breeding). Since the estrus cannot be judged accurately in time, the estrus period is missed, and insemination and breeding cannot be performed, which greatly affects the breeding of dairy cows. rate, increasing feeding costs and generation intervals, reducing the economic benefits of dairy farming