Breeding method for replacement gilts

A technology for gilts and breeding methods, which is applied in animal husbandry and other fields, and can solve problems such as inconsistency

Inactive Publication Date: 2019-02-22
天津市农业科学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the feeding standards adopted in the breeding process of gilts are not unified, and the feeding standards of gilts provided by various parties are also very different

Method used

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  • Breeding method for replacement gilts
  • Breeding method for replacement gilts
  • Breeding method for replacement gilts

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The breeding method of gilts includes the following steps:

[0065] (1) Control the best mating age of gilts: the best mating age of gilts is 221-230 days, and the maximum age of gilts participating in mating does not exceed 250 days;

[0066] (2) Determine the suitable weight of the gilt: the suitable weight of the gilt is 135-145 kg;

[0067] (3) Method for inducing estrus in gilts: using adult boars to induce estrus in gilts does not need to be too long, as long as 5-10 minutes each time is enough. The key method for inducing estrus is to design two boars (male The pigs are separated from each other), the heads and tails of the two boars are in opposite directions, and then the sows are driven to turn around the boar pens. No matter which direction the sows turn from, they can touch the boar's head, allowing it to reach the nose-nose, mouth -Mouth contact;

[0068] (4) Dietary protein / lysine standards and feeding methods for gilts: adopt a two-stage feeding mode and free-fe...

Embodiment 2

[0071] Comparative test

[0072] (1) The breeding method of conventional gilts:

[0073] First mating time: 220-270 days old; first mating: weight 125-170 kg; boar induction time 15-20 minutes, no more than 90% of gilts will come into estrus within 6 weeks after puberty stimulation; traditional Three-stage feeding mode: weight 30-60 kg stage, free intake; weight 60 kg-two weeks before mating, restricted feeding; two weeks before mating-mating, aphrodisiac feeding; no clear regulation of gilts in Appropriate age and estrus reach the protein / lysine nutrition standard of appropriate weight.

[0074] (2) The breeding method of the gilt of the present invention:

[0075] 1) It is determined that the best breeding time for gilt fingers is between 221-230 days of age, and it is clearly stated that gilts are bred at the age of 250 and above, which will not only cause high breeding costs, but also affect the reproduction performance (the litter size is reduced by 9.8% , The number of live li...

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Abstract

The invention discloses a breeding method for replacement gilts obtained after long x big and big x long binary hybridization. According to the method, four key control points in the breeding processof the replacement gilts are mainly involved and comprise the best mating day age, adaptive weight, an estrus induction method (stimulation on boars) for the replacement gilts and the time length anddaily ration protein / lysine standards for the replacement gilts; if mating is too late, not only is the breeding cost high, but also the breeding performance of the replacement gilts in the whole life can be influenced; the mating replacement gilts the weight of which is lower than the adaptive weight give birth to few live piglets in the first farrow and are easily eliminated prematurely; the problem of difficult estrus of the replacement gilts is solved, and meanwhile the working efficiency of personnel is greatly improved; a nutrient regulation method is adopted for controlling the weightof the replacement gilts in the most suitable stage at the best mating day age and in the best estrus cycle under the free foraging condition. The breeding method can fully exert the production potential of the replacement gilts in the whole life and can also prevent the gilts from premature elimination.

Description

Technical field [0001] The invention belongs to the technical field of pig production and pig nutrition, and mainly relates to a breeding method for the gilt finger system, which solves the problem of non-estrus and the reproduction performance of the gilt in a lifetime. Background technique [0002] The basis for high and stable production of large-scale pig farms is to maintain a reasonable gestational age structure of the basic sow herd. Therefore, it is extremely important to ensure the supply of gilts and properly breed them in a planned way, which is often seen in production practice. When the supply of gilts is not guaranteed, it is impossible to eliminate old sows and reduce the reproductive performance of the entire farm. Like investment, gilts must be carefully taken care of. Failure to properly cultivate and manage will Failure to fully exploit the production potential of gilts may lead to premature culling of sows. [0003] Compared with sows 20 years ago, modern high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K67/02
CPCA01K67/02
Inventor 赵宏志穆淑琴李千军郑梓马墉李宁闫峻李平
Owner 天津市农业科学院
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