Reserve boar management

Managing well-established boars to increase their utilization is critical to farm production. The boar's annual replacement rate is 40% to 50%. If the boar is not properly managed, there will be azoospermia, dead sperm, thin semen, or unsuccessful tuneups, which will cause great losses to the pig farm. The following describes the management points of the reserve boar.

Feed and feed

1. Feed application boar special materials. If the boars on the site are less than sow feeds, the protein content in the feed is 17% to 18%, the digestible energy is 3,200 kcal to 3,300 kcal per kilogram, and the lysine, VE, and VC can be appropriately increased in the hot season. The content of the boar to improve the anti-stress ability and the quality of semen.

2. The amount of feeding is between 2kg and 3kg, and attention should be paid to ensure clean drinking water. The sensation control should be 1 point lower than the same-day sow (according to the 5-point scoring system).

temperature

The optimum temperature for boar management is 15°C, suitable temperature is 15°C~20°C, relative humidity is 60%~80%, bovine testicular temperature should be 2°C~3°C lower than body temperature, if testicular is under high temperature Increased temperature will lead to degeneration of the reproductive epithelium, impeded synthesis of androgens, impaired spermatozoa, decreased spermatogenesis, and reduced semen quality. If the temperature exceeds 30°C, boar semen quality may take 6 weeks to 8 weeks to recover. Therefore, it is necessary to control the temperature of the boar during the summer to cool the room temperature within 30°C.

Boar cooling measures

Since temperature has a great influence on the quality of boar semen, it is recommended to take effective cooling measures:

1. Since the boar in the positioning column of the boar has a small space, it can use air-conditioning to cool down, and the cooling effect is obvious.

2. The number of boars or pigs in large columns can be reduced by using water curtains. The circulating water must use groundwater to ensure that the room temperature is around 28°C. 3. Some open boar units can use ceiling fans + spray, or a 25 cm-high pool outside the boar and a shade net outside the boar so that the boar can lie in the pool and cool down.

Isolation and adaptation

Isolation and adaptation procedures are a necessary measure for pig farms to maintain their health, and they are increasingly accepted by everyone. This is particularly important when a negative-pig is introduced into a blue-ear disease-positive farm. Otherwise boars may occur. Azoospermia, dead sperm, thin semen.

The isolation time during actual operation should not be less than 2 weeks and 4 weeks is appropriate. If the original farm is positive for PRRS, it should be isolated for more than 8 weeks. After the isolation period is over, if the pig is normal, it will enter the adaptation period and it will continue until breeding.

Adaptation 1. Purpose: To enable new breeder pigs to adapt to the microbial environment of the original herd. The original herd can be balanced with the new breeder pigs in the microbial environment. 2. Measures: 1 Contact the new boar with the feces of the pigs in the first week of production. 2 In the second week, fresh boars (cutaways), fetal clothing, and mummified ingredients were fed to new boars in the delivery room. 3 In the third week, 30 kg to 40 kg of growing pigs are placed next to the new boar at a ratio of 1:5 to 1:10. It is advisable to contact them through the pen. 4 From the fourth week of adaptation to pre-breeding, the eliminated male and female pigs were placed adjacent to the new boar at a ratio of 1:20 (to prevent new boar injuries). 5 If serious adverse reactions occur, contact should be stopped immediately.

Immunity

Vaccine is one of the important measures to ensure the health of pigs. After the isolation period is completed, the type of vaccine injection may not necessarily be the same in each field. It is mainly based on the local epidemic situation and the geographical location of the farm, biosafety and the health of the pigs. Decision.

At least one swine fever before breeding.

Foot-and-mouth disease is used once every 3 months to 4 months.

Although JE maternal antibodies of JE can last for 150 days, the boar testicles often appear in large and small sizes in actual production. It is recommended that JE vaccine be injected as soon as possible after the boar arrives.

Pseudorabies is injected twice during the adaptation period.

The parvovirus was injected twice at 180 days and 210 days of age.

Blue Ear disease is determined on its own initiative.

Panting disease If the original farm is gasping for puffing, the pneumoconiosis-negative pig will be vaccinated 3 days to 7 days after arrival and will be strengthened 3 weeks later.

Breeding intensity

Training period 7 months to 9 months: 1 sperm per week.

Early mating stage 10 months to 12 months old: 1.5 times weekly sperm extraction.

Mature stage more than 12 months old: 2 times a week sperm, even if not used, must also be refined once a week (discard), in order to maintain the vitality of testicular sperm.

Boar training

When the age of the reserve boar reaches 6 months to 7 months, the training can be started. As long as the method is proper, more than 90% of the boars under 10 months of age can be successfully tuned. Some people in the production think that boars are difficult to tune up. It is because of lack of patience. There will be problems with conversations with boars or placement of picking stations.

1. The boars should be raised in a single column, do not polyculture, prevent mutual climbing. 2. If boars are adjusted for age, they will appear in the evening. 3. If the design is unreasonable, the boars in the next room, the boar can not see the other boar collection process. 4. If the fence is too big, it will distract the boar.

Method of Adjustment 1. When the boars are transferred to the GTC, they should not be trained immediately. They should be allowed to become familiar with the environment. After 3 days to 5 days, the boars will begin to be tuned.

2. If it is an old farm, the new boar should be kept next to the fake Taiwanese to allow him to observe the other boar collection process; if it is a new field, first adjust the boar with strong sexual desire and easy to attack, after the success of the training In the remote areas, place the untrained boars next to the fake table animals and let them observe the process of other boars. The boar's pleasant expression after seeing the boars down is easy to imitate. Do not climb without training.

3. Don't put anything around the counterfeit livestock so as not to distract the boar and try to focus the boar on the counterfeit livestock.

4. Firstly adopt a boar with good tune. The secretions left by the boar should not be cleaned. The pig's sense of smell is very sensitive. The smell of the pigs on the fake table animal will form a strong olfactory stimulus to the boar, especially the boar. The urine.

5. Adjust the height of the counterfeit livestock. After the new boar has entered the harvesting column and let it move for a few minutes, use a wet towel (with boar secretions on the top) to lure the boar closer to the fake table. Keep in touch with the boars and pat the counterfeit livestock by hand to focus their attention on the counterfeit livestock. If the boar bite the pseudo-tablet with his mouth, gently stroke his head and nose with his hands. During the whole process, he should constantly talk to the boar and say something praise. Then the boar may have to climb. If the boar does not panic after climbing, use the thighs to keep the hips from sliding down. After the boar has been twitched several times, pull the penis with his left hand or right hand to pull out the penis (new employee) At this point you may use your eyes to look at the boar's penis, and you may not be able to catch it, let alone use your right hand to operate on the right side, and wait until the boar is completely ejaculated and the penis is atrophied. After the boar comes down, you can touch it and say something of praise. The activity will be driven off after 1 minute to 2 minutes.

6. If the new boar is not heading in the wrong direction at the first time, do not try to correct it. Beating the boar will only have the opposite effect, as long as the semen can be produced to produce a pleasant feeling. If it is only a little bit off, you can use the elbows to push it closer to the exact position.

7. New boars are generally afraid of people when they begin to adjust. It is very important to talk to the boars at this time, so that they have a trust in you, otherwise the tune can not be successful. At this time, be patient, do not because the boar does not climb And angry with the boar or hit it. The training time for each boar is 15 minutes to 20 minutes. If it is unsuccessful, wait for the next time. Because it is not interested in fake Taiwan animals, it will not only waste time but may also affect the next training session.

8. Once the tuning is successful, it will be continuously refined in the next 3 days to consolidate its habits.

If the above method does not work, you can try the following method: 1 adjust the height of the fake table animal. The boars were controlled by the two railings behind the pseudo-tablets, and the boars could not walk. The boars were lured by the side and the individual boars were successfully tuned. 2 spread the skin of a fat pig on the fake table animal, sprinkle the urine or secretions of the boar and stimulate the boar visually and olfactoryly. 3 Take a pig and place it on a counterfeiting platform to make it make a call. Individual boars will climb. 4 Choose a sow with a particularly good hair and place it next to the harvesting column. Use pheromones to stimulate the boar and increase sexual desire. Then induce it to climb.

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