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Treatment method for improving effect of synchronous estrus and timing insemination in dairy cows in summer

A treatment method and a technology for timing insemination, which are applied in the fields of medical science, additional food elements, animal feed, etc., can solve the problems of unsatisfactory effects of the simultaneous estrus technology of dairy cows in summer, and achieve the improvement of the estrus rate of the same period, the improvement of breeding efficiency, and the saving of breeding. cost effect

Active Publication Date: 2019-10-25
HUAZHONG AGRI UNIV
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the unsatisfactory effect of the simultaneous estrus technology of dairy cows in summer, the present invention provides a treatment method for improving the effect of simultaneous estrus-timed insemination of dairy cows in summer, so as to improve the simultaneous estrus rate and breeding conception rate of dairy cows in summer

Method used

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  • Treatment method for improving effect of synchronous estrus and timing insemination in dairy cows in summer
  • Treatment method for improving effect of synchronous estrus and timing insemination in dairy cows in summer
  • Treatment method for improving effect of synchronous estrus and timing insemination in dairy cows in summer

Examples

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Effect test

Embodiment 1

[0033] In this experiment, N-carbamylglutamic acid (NCG) was added to the diet of Chinese Holstein dairy cows at different times during the perinatal period to study the effect of N-carbamylglutamic acid (NCG) on the development of follicles and estrus of cows. In order to improve the problem of poor estrus effect of the existing estrus synchronization program in summer, and increase the milk production of dairy cows. A total of 169 healthy pre-peripartum Holstein cows in good body condition were selected, and the cows were randomly divided into 4 groups according to the principle of age, weight, parity, milk production in the previous lactation period and the expected date of delivery. From the 260th day of embryonic pregnancy or 20 days before the expected date of delivery to different times after delivery (15 days, 30 days, 50 days), NCG 20g / head was added to the daily diet. Experiment Ⅰ started 20 days before delivery, added 20 g of NCG to the basal diet every day, and con...

Embodiment 2

[0044] For the four groups of experiments in Example 1, the milk production at the initial stage of postpartum lactation was measured, and the milk production on the 5th day, the 10th day, the 15th day, etc. were detected by analogy every 5 days, and the cows were supplemented with different NCG The effect of time on the milk production in the early stage of postpartum lactation is shown in Table 3, and the daily milk production is as follows image 3 shown. The results showed that the average daily milk production of dairy cows showed a gradual increase trend in the first 20 days after calving. From 20-25 days, the milk yield of the 20g / 70 day experimental group was significantly higher than that of the control group (P0.05). The 20g / 70 day experimental group III had Trend above 20g / 35 days. On the 30th day, although there was no significant difference between the groups, the treatment group was higher than the control group. On the 40th day and 45th day, the supplementary...

Embodiment 3

[0056] For the four test groups with different days of NCG supplementary feeding, lipoprotein esterase, aspartate aminotransferase, urea, and nitric oxide were measured one day before the simultaneous estrus treatment, on the day of mating, and 50 days after mating. The results are shown in Table 5 , different supplementary feeding times of NCG had no significant effect on the concentrations of lipoprotein esterase, aspartate aminotransferase, urea, and nitric oxide indicators on the day before the synchronous estrus (P>0.05), but there were significant differences in arginine and blood sugar in different supplementary feeding groups ( P<0.05), wherein the test group III of the blood glucose index concentration of 20g / 70 days was significantly higher than that of the test group I of 20g / 35 days (P<0.05), but there was no significant difference between the control group and the test group II of 20g / 50 days difference. The test group III with arginine index concentration of 20g / ...

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Abstract

The invention provides a treatment method for improving the effect of synchronous estrus and timing insemination in dairy cows in summer. The treatment method includes the steps of S1, adding NCG (N-carbamyl glutamate) to daily ration of the dairy cows for continuous feeding of 70 days from the day 260 of the cows' pregnancy or from 20 days before the expected date of delivery to the post natal period of 50 days; S2, on the 0th day of synchronous estrus treatment, intramuscularly injecting gonadotropin-releasing hormone to the cows of estrous cycle; S3, on the 7th day, intramuscularly injecting PGF2a; S4, on the 9th day, injecting the gonadotropin-releasing homore and meanwhile injecting mifepristone; S5, on the 10th day, carrying out artificial indoctrination; S6, on the 15th day, intramuscularly injecting human chorionic ganodotropin; S7, on the 55th day, determining pregnancy of the cows by B-mode ultrasound. With the treatment method, the estrus rate, the distribution rate and thepregnancy rate of the postpartum dairy cows can be effectively increased, the milk yield and the early embryo survival rate of the dairy cows can be increased, detection of estrus is not needed, timing insemination is achieved, and operation is facilitated.

Description

technical field [0001] The invention belongs to the technical field of buffalo breeding in animal husbandry, and in particular relates to a treatment method for improving synchronous estrus-timing insemination of dairy cows. Background technique [0002] In the production of dairy cattle industry, the low reproductive rate is the key factor leading to the low production performance and benefit of dairy cattle in our country. The reproductive performance of dairy cows is directly related to the production and breeding benefits of dairy cows, and it is also one of the important conditions for the sustainable development of dairy cow production. High-yielding dairy cows are prone to abnormal estrus due to various stresses during the postpartum lactation peak period, manifested as no obvious estrus symptoms, no estrus, irregular estrus and ovulation, quiet estrus, delayed ovulation, ovary quiescence, follicular cysts, etc., resulting in reproductive failure. The rate of decline...

Claims

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Application Information

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IPC IPC(8): A61D7/00A61D19/02A01K67/02A23K20/142A23K50/10
CPCA01K67/02A23K20/142A23K50/10A61D7/00A61D19/02
Inventor 滑国华杨利国阿地力·阿不来提
Owner HUAZHONG AGRI UNIV
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