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A method to improve the efficiency of timed insemination of gilts

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

Active Publication Date: 2021-11-19
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A method to improve the efficiency of timed insemination of gilts
  • A method to improve the efficiency of timed insemination of gilts
  • A method to improve the efficiency of timed insemination 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] Such as 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,...

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Abstract

The invention discloses a method for improving the efficiency of timed insemination of gilts. Healthy gilts of the right age are selected, and 1000 IU / head of PMSG is injected intramuscularly, and the program of timed insemination starts after 15-20 days. In the early stage of the routine timed insemination program, the gilts are pretreated with PMSG to provide a process of follicle development for the sows, so that the gilts are in an artificially known estrus before the routine timed insemination program, that is, The luteal phase of follicles began at 15 days, and the follicle development period began at 20 days. The initial follicle development state of the whole population was consistent and controllable. The results show that the consistency of the initial follicular state can increase the pregnancy rate, total litter size, and live litter number after the timed insemination procedure, thereby improving the overall efficiency of timed insemination of gilts and effectively making up for the existing Insufficiency of the program, realize the optimization of the existing timing insemination program, improve the reproductive performance of gilts, thereby increasing the economic benefits of the pig farm.

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 Patents(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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