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

A conception rate, dairy cow technology, applied in the field of livestock breeding, can solve the problems of insemination and breeding, missed estrus, increase feeding cost and generation interval, save manpower and material resources, promote estrus, and reduce embryo loss.

Inactive Publication Date: 2016-11-23
HEBEI UNIV OF ENG
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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

Method used

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Embodiment Construction

[0020] A method for inducing high-yield dairy cows to ovulate regularly and improve conception rate, the specific steps are as follows:

[0021] 1. 35-40 days after calving of high-yielding dairy cows, implant progesterone sponge plugs (18-norethisterone 50-100mg, or progesterone with equivalent biological activity, progesterone methyl acetate (referred to as medroxyprogesterone) , chlormadinone acetate (referred to as chlormadinone), megestrol or norethindrone) or CIDR (progesterone 1.38g, or 18-methyl norethindrone, progesterone methyl acetate with equivalent biological activity , chlormadinone acetate, megestrol or norethindrone).

[0022] 2. Take out the sponge plug or CIDR 14-16 days after implantation, and then inject prostaglandin (intramuscular injection of 0.4 mg domestic cloprostenol or PGF2α, fluprostenol, methyl PGF2α or PGF1α methyl ester with equivalent biological activity; or uterine Intraperfusion of domestic cloprostenol 0.2 mg, or PGF2α, fluprostenol, methyl...

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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...

Claims

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Application Information

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IPC IPC(8): A61D7/00A61D19/02
Inventor 杨凌于学颖张乐颖杨亚熙张鹤平
Owner HEBEI UNIV OF ENG
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