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Breeding method for improving estrus rate of American-series large white replacement gilt

A technology of gilt and estrus rate, applied in the direction of animal feed, animal feed, application, etc., can solve problems such as poor reproductive performance of farmers

Active Publication Date: 2017-08-22
浙江美保龙种猪育种有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

American pigs have the advantages of fast growth, thin backfat, high feed utilization rate, good body shape and strong adaptability. However, a prominent problem that plagues farmers is that the reproductive performance of American pigs is worse than other breeds.

Method used

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  • Breeding method for improving estrus rate of American-series large white replacement gilt
  • Breeding method for improving estrus rate of American-series large white replacement gilt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: A breeding method for improving the estrus rate of American Large White gilts

[0017] 1) 4-6 months old

[0018] When the sows grow to 4 months old and weigh 70-80 kg, gilts are selected and fed with feed for gilts; the feeding method at the age of 4-6 months is: free drinking water, free food intake, large pen feeding 12 to 15 pigs in pens; every 100 kg of gilt feed contains 60 kg of corn, 19 kg of soybean meal, 10 kg of bran, 5 kg of extruded soybean, 4 kg of 4% gilt premix and 2 imported fish meal (PRODUCT OF PERU (made in Peru) kg, the nutritional indicators are 17.5% crude protein, 0.9% calcium, 0.7% total phosphorus and 3150 digestible energy;

[0019] 2) 6-7 months old

[0020] After 6 months of age, when the sows weighed 110 kg, optimal feeding and restricted feeding were carried out, and 2.0-2.5 kg of optimized sow feed was fed every day to maintain a daily gain of 0.5 kg. , increase feeding optimized sow feed, daily feeding amount is 3-3.5kg unt...

Embodiment 2

[0025] Example 2: The method of Example 1 is adopted, but the optimized sow feed in step 2) is changed to the gilt feed in step 1), and other steps and conditions are the same as in Example 1.

Embodiment 3

[0026] Embodiment 3: adopt the method of Embodiment 1, but change the gilt feed in step 1) to the optimized sow feed in step 2), and other steps and conditions are the same as in Embodiment 1.

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Abstract

The invention discloses a breeding method for improving the estrus rate of an American-series large white replacement gilt, and belongs to the technical field of sow breeding methods. The oestrus of the American-series large white replacement gilt is stimulated in time by means of optimizing the feed formula and injecting hormones at the reasonable periods at the four different stages of 4-6-month stage, 6-7-month stage, 7-9-month stage, and 9-10-month stage, so that the estrus rate of the American-series large white replacement gilt is improved.

Description

technical field [0001] The invention belongs to the technical field of breeding methods for sows, and in particular relates to a breeding method for improving the estrus rate of American Large White gilts. Background technique [0002] At present, most of the breeding pig breeds popular in the market are foreign breeds, while the American breed pigs occupy the domestic mainstream market. American breed pigs have the advantages of fast growth, thin backfat, high feed utilization rate, good body shape and strong adaptability, but a prominent problem that plagues farmers is that the reproductive performance of American breed pigs is worse than other breeds. Because the American Large White pig is a late-maturing breed, its sexual maturity is late, and estrus is not obvious. If it is not used properly, it will not be conducive to the maximum production value of breeding pigs. The higher the culling rate of gilts, the greater the economic loss. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): A01K67/02A23K50/30A23K10/30A23K10/37A23K10/22
CPCA01K67/02Y02P60/87
Inventor 沈建军舒鑫标黄黎娟邢晓军彭俊平宋占学
Owner 浙江美保龙种猪育种有限公司
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