Pig-raising households know that the sows themselves are sows produced by cross-breeding. So what kind of boars should be matched if the piglets produced by the sows are of good quality? Is it the same variety, or is it a good quality boar?
1 Guarantee the quality of semen
1.1 Grasp the breeding management of boars
Boars must be fed a special feed for boars, fed twice a day, 2.5-3kg per day, 1 egg, and 2-3kg per day. The temperature of the boar house should not exceed 28oC (more than 28oC has adverse effects on sperm), keep the pens and pigs clean, and drive the boars out of the pens for 30 minutes every morning.
1.2 Strictly control the quality of semen
After semen collection, first look at the amount, color and odor of the semen (the normal semen ejaculation is generally 150-300mL, the color is milky white or light gray, slightly astringent), if the sense of normal, should be immediately microscopic examination The fresh sperm can reach the level of 0.7 and can be diluted above, otherwise it will be discarded. The semen should be diluted as soon as possible after collection, and the original essence should not be stored for more than 30 minutes. Dilute with a special dilution of semen. When diluting, adjust the temperature of the diluent to the temperature of the semen. Pour the diluted solution into the semen along the cup (bottle) of the semen. Gently shake it to mix it, then dispense. .
1.3 preservation of semen
The ambient temperature for storing semen must be controlled between 11-17oC, and the temperature difference between day and night should not exceed 2oC, preferably stored in a 17oC thermostat freezer. Dilute the dispensed semen first at room temperature (22-25oC) for 1h, then pack it with several layers of towels and store it directly in a 17oC incubator. The semen should be shaken once every 12 hours during the preservation of semen to prevent sperm from causing death. The shelf life is generally no more than 3d.
1.4 Storage of semen during insemination
In the cold winter or hot summer, the semen cannot be exposed to the outside for too long (because heat stress or cold stress will affect the sperm quality). In winter, the semen bottle should be placed in the palm of the hand for 2-3 minutes to avoid semen. The temperature is too low and the semen is backflowed. Semen transport should be stored in a foam box, cool water in summer and warm in winter.
2 Overcoming the sow's own cause
2.1 Selection of sows
Overcoming the traditional selection method of the mother, the selected double-hybrid sow body should meet the requirements of reproductive production, the body is wide, the back waist is straight, the hindquarters are wide and developed, the limbs are firm and slightly longer, and the vulva develops normally. , the vulva is larger, the effective nipple is more than 7 pairs; the parent of the binary hybrid sow used for breeding should have excellent reproductive performance, and the hybrid is produced by using Changbai or about grams as the first male parent to produce a grown or large long binary mother. Pig, Duroc is generally used as the terminal father.
2.2 age-appropriate breeding
The sows are mature and sexually mature late, generally reach sexual maturity at 6-8 months of age. At this time, do not rush to breed, wait until the body weight reaches 120kg or more, and after 3 estrus, that is, the fourth estrus can be bred. .
2.3 Grasping the management of sows
Sows must be fed a special sow feed (divided with sow feed, pregnant sow feed and lactating sow feed) at different stages and feed. The sow has a moderate sensation, can not be too fat or too thin, and at the same time supplement a certain green feed to ensure the normal supply of vitamins.
2.4 timely elimination of not applicable sows
The types of elimination include: estrus symptoms are not obvious, estrus cycle is irregular; long-term infertility and treatment has no obvious improvement; violent temperament, poor motherhood; poor lactation performance, nipple defect; suffering from infectious diseases. Because the above types of sows have low fertility rates and low productivity, they have no practical value.
The above is how the fertility rate of the dual sows brought by Huinong.com is improved. If you have also raised a double sow or are ready to start breeding a sow, you may wish to refer to this article. Article, more content in Huinongwang!
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