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Method for superovulation of young dairy cattle with high intensity repeatedly

A superovulation and high-intensity technology, which is applied in the field of livestock breeding, can solve problems such as difficult time control and achieve high economic benefits

Inactive Publication Date: 2010-07-21
李树静 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

You can only wait until the middle of the estrous cycle of cows to start superovulation, and the time is not easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: High-intensity continuous superovulation of young Holstein cows

[0032] Cows to be tested: 139 Holstein young cows

[0033] Step 1. From the age of 10 months, adjust the diet plan to a feed with a protein content of more than 18%

[0034] Step 2. When the cow to be tested is 11.5 months old, use 300-400 units of long-acting oxytetracycline injection 25-40ml to clean the uterus.

[0035] In step 3, select the 12-month-old test cow treated in step 2 without inflammation of the reproductive system as the donor cow, and perform the superovulation treatment in the following steps.

[0036] Step 4. Take the day when the cows were released CIDR as day 0, and on the 4th, 5th, 6th, and 7th days after the CIDR release, every morning (7:00-8:00) and evening (18:00-19:00:00) 00) FSH-P was injected 2 times, for 4 consecutive days, with decreasing injection, and the FSH injection gradient was:

[0037] (2.0mg+1.5mg+1.0mg+0.5mg)×2=10mg

[0038] At the same time as the ...

Embodiment 2

[0046] Example 2: High-intensity continuous superovulation of Flavich dairy and meat cattle

[0047] Cattle to be tested: Flavich milk and meat cattle

[0048] Step is with embodiment 1.

[0049] As a result, from 11.5 months of age to 13 Flavich young cattle, the embryos were continuously superovulated and punched 4-5 times to the age of 15 months, and an average of 6.13 usable embryos / cow / time were obtained. After the continuous superovulation of embryos, 13 cows were directly artificially inseminated for 1-3 estrous periods, and the conception rate of the whole herd reached 92.3%.

Embodiment 3

[0050] Example 3: High-intensity continuous superovulation of Simmental cattle for meat

[0051] Cattle to be tested: 21 Simmental young cattle for meat

[0052] Step is with embodiment 1.

[0053] Results: From 11.5 months of age, continuous superovulation and embryo punching for 4-5 times to 15 months of age, an average of 5.85 usable embryos / head / time were obtained. Artificial insemination and embryo transfer were not performed after the end of continuous superovulation and embryo punching.

[0054] The above implementation cases show that this technical solution is efficient and stable, and can give full play to the reproductive potential of various breeds of cows before breeding age, obtain higher economic benefits, and do not affect the subsequent natural fecundity. The development of breeding technology provides a new way.

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Abstract

The invention relates to a method for superovulation of young dairy cattle with high intensity repeatedly, belonging to the technical field of livestock reproduction. The method comprises adjustment of dietary nutrition standards before superovulation treatment of donor cattle, pretreatment of reproductive system, superovulation hormone treatment program and multiplicative process after repeated superovulation. The superovulation time of donor cattle is advanced to be 11.5 age of the moon, and the superovulation interval is shortened to be 21-26 days; the reproductive potential of various cows before reproductive life can be fully developed, thereby obtaining higher economic benefit without influencing subsequent natural reproductive capacity.

Description

technical field [0001] The invention relates to livestock breeding technology, in particular to a high-intensity repeated superovulation method for 11-15 month-old young cattle. Background technique [0002] The superovulation response is affected by many factors, such as different hormone preparations, different hormone batch numbers, and the duration of superovulation treatment. The stage of the estrous cycle, the total dose of hormones, etc. during superovulation. One of the more important factors is related to the heredity of the animal itself and its environment. These factors include nutritional status, reproductive history, age, season, breed, state of the ovary during superovulation, and the effect of repeated superovulation (Yu Wenli et al., 1999). [0003] The principle of superovulation is based on the dynamics of follicle waves. The concept was first proposed by Rajakoski in 1960 by testing cattle ovaries collected from slaughterhouses. He observed that folli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61D19/00
Inventor 李树静余文莉
Owner 李树静
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