Method for increasing timed insemination efficiency of gilts

A technology for gilts and timing insemination, applied in the field of livestock breeding, can solve the problems of pregnancy rate, litter size not reaching a high level, affecting the effect of external application procedures, etc., to increase the economic benefits of pig farms, improve reproductive performance, The effect of improving overall efficiency

Active Publication Date: 2020-09-29
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Claims
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Problems solved by technology

However, under the current technical level, the pregnancy rate and litter size of gilts with timed insemination have not yet reached a high level. The consistency state of internal organ functions before insemination procedures also directly affects the effect of external procedures

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  • Method for increasing timed insemination efficiency of gilts
  • Method for increasing timed insemination efficiency of gilts
  • Method for increasing timed insemination efficiency of gilts

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Embodiment Construction

[0018] The present invention will be further explained below in conjunction with the embodiments and the accompanying drawings. The following examples are only used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] 1. Experimental animals

[0020] Randomly select a group of healthy gilts (growth binary sows), aged between 190-220 days, with a body weight of about 100-110kg.

[0021] 2. Experimental grouping and process

[0022] like figure 1 As shown, the experimental sows were divided into 3 groups: PMSG-15D timed insemination group, that is, the timed insemination began on the 15th day after intramuscular injection of 1000 IU (10 mL) / head of pregnant horse serum gonadotropin (PMSG) According to the estrus cycle of the sow, the ovary is still in the luteal phase at this time, and the dominant follicles have begun to be recruited, but they have not yet started to develop; the PMSG-20D timed insemination group, th...

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Abstract

The present invention discloses a method for increasing the timed insemination efficiency of gilts. The method includes: selecting healthy gilts with suitable ages, intramuscularly injecting 1000 IU of PMSG per gilt, and starting to execute a timed insemination program after 15-20 d. PMSG pretreatment on the silts is preformed at the early stage of a conventional timed insemination program to provide a follicular development process for the gilts, so that the gilts are in an artificial known estrus before the conventional timed insemination program, that is, a follicular luteal phase begins from the 15th d, a follicular development period begins from the 20th d, and the initial follicular development states of the overall population are consistent and controllable. Shown by a result, the consistency of the initial follicular states may increase the pregnancy rate, the total number of births and the number of live births after timed insemination program processing, so that the overall efficiency of timed insemination of the gilts is increased, defects of an existing program are effectively overcome, an existing timed insemination program is optimized, the reproduction performance ofthe gilts is increased, and thus, the economic benefit of a pig farm is increased.

Description

technical field [0001] The invention relates to the technical field of livestock breeding, in particular to a method for improving the timing insemination efficiency of gilts. Background technique [0002] In the actual production of breeding enterprises, 10% to 30% of gilts have recessive estrus, and the production time is delayed because no obvious signs of estrus are observed; 9% to 21% of primiparous sows are weaning After that, they were eliminated because they did not show the characteristics of estrus for a long time; even for multiparous sows, the estrus rate within 7 days of weaning was only 75% to 85%. However, most of the above sow populations in recessive estrus were able to ovulate as usual. Timed insemination technology can promote sows' estrus, increase the number of sows' annual births, reduce the number of non-production days of sows, and improve the production and utilization efficiency of sows. Therefore, timing insemination is an important reproductive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K67/02A61D19/02A61K38/22A61P15/08A61K31/567
CPCA01K67/02A61D19/02A61K31/567A61K38/22A61P15/08
Inventor 黄菁赵倩倩潘建治朱志伟陈晓宇张樑于福先
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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