Boar production technology management points
The aim of the boar raising and management is to make it have a suitable body condition (8 to 9 months of age), good libido and excellent semen quality. The main points of feeding and management in the pig production process are as follows:
1. Boar feeding
Provide the nutrients needed to optimize the quality of the semen and the maximum quantity; require single-column feeding, boars are fed twice a day, boars are fed 3 kg per head per day during the breeding period, and 2.8 kg per head per day is charged during the non-breeding period . Suitable feed supply. Many pig farms supply high-energy, high-protein feeds to the boars in reference to the practice of adding eggs during the breeding of the farms. This is not necessary under the premise of systematic use of boars on large-scale pig farms. It will be more conducive to improving the quality of semen, so it is recommended that boars be fed with empty sow material to keep 8-9 months of age. Don't overfeed each meal so that pigs do not get fed up and snooze.
2. The use of boars
The reserve boar begins to be used at 9 months of age. Before use, breeding and semen quality tests are conducted. When used, the body weight requirement is 12 okg, and the age is 240 days (8 months old). The use of the boar can be used every week for 1 to 5 weeks. 1 to 2 times, 3 to 4 days apart, 1 to 2 year-old young boar can use 2 to 3 times a week. For boars over 2 years of age, they can be accompanied by 2 to 3 times a day in the case of a high level of feeding and management. If they are used twice, they should be separated by 8-10 hours for two times and should be rested for one day after being used for 5 to 6 days. The resting period of a healthy boar must not exceed 2 weeks in order to avoid breeding disorders. If the boar is ill, it must not be used within 1 month.
3. Regular testing of semen quality
The quality of the semen should be checked every time the insemination is performed. The quality of the semen must be checked twice a month for the monthly quality of the semen, and twice a month for the summer. If three consecutive fine inspections fail or two consecutive fine inspections fail, When a fruit pill is swollen, atrophied, hypoactive, or claudication, it must be eliminated. In particular, 2 or 3 seizures should be performed before the reserve boar begins to use and before the non-mating period shifts to the breeding period. Part of the infertility that occurs in sows is due to boar semen quality. There are 3 conditions that can result in insemination of sperm from boars: high ambient temperatures; increased body temperature in boars; some vaccine injections. Regular testing of boar semen quality will provide a basis for monitoring mating performance, avoiding the premature elimination of some elite sows and increasing the fertility rate of mating.
4. Boar movement
Two or three times per week are required to drive the sports when conditions permit. In addition to the movement of the boar in the column, the boar should be driven to the outside of the pens for exercise, 1 in the afternoon and 1 in the afternoon, and exercise for 0.5 to 1 hour per day in order to maintain adequate exercise. Summer (air temperature higher than 30°C) is carried out when it is cool in the morning and in the evening, and during the winter (temperature below 10°C), it can be exercised once in noon. On rainy days and temperatures below 5°C, it should be exercised in the walkway. Appropriate exercise is conducive to maintaining the boar's healthy constitution and good breeding ability, and increasing the service life. It has been adopted for most pigs.
5. Management of breeding
The breeding assistant work is done. From the moment the male and female pigs are released, the brooding staff must be kept aside all the time. Once they begin to climb, they should immediately assist and use their feet to stand on the sow to prevent boars during the mating process. If the gilt-sweeping sow cannot sustain the mating and suspends the mating, the boar that cannot enter the pus cunt smoothly should pull the sow's tail out, hold the penis sheath or form a circle with his right hand, and then guide the penis to the pussy. If the pigs are physically disparate, they may choose to have slopes so that the big boars can stand under the slopes and the gilts can stand on them or put a sack on the back of the sow. When the boar climbs on the sow, The two corners of the sacks were raised by two people to relieve the pressure on the sows from the boar's precursor. Control mating time, when the boar mating task is not large, do not control its ejaculation, allowing it to complete the down, when the mating task is large, when the boar twice ejaculation, you can drive the sow to terminate the mating.
6. Avoid the influence of high temperature on breeding results
If the ambient temperature is higher than the ambient temperature, the temperature of the boar will be higher than the appropriate 34-35°C, which will increase the rate of sperm death and the conception rate will be greatly reduced. The solution is to reduce the ambient temperature, and air-conditioners, wet curtains, and spray can be used. Water and other methods. When the weather is hot, you should choose to breed in the cooler morning and evening, and reduce the number of uses. If using artificial insemination or treating expensive boars, air conditioning is the best solution, although the investment is large but it is insignificant relative to the resulting benefits. The cooling of the wet curtain is suitable for use in large-scale pig houses, but the effect is not ideal when the high temperature is above 38° C., especially when the humidity is high. Water cooling is an economical way to keep the fertility rate of the breeding at more than 80%. In this method, a fan is installed on the beam of the pig house, and the direction is upwards. A water pipe (plastic) is installed on the upper part of the barn. The water continuously dripping in the water pipe encounters high-speed rotation of the fan blade and turns into a mist and flies to the surroundings by centrifugal force. 40W fan spray radius up to 3m.
7. Routine work procedures for the boar
Go to work* Check the temperature, air, and feed of boars and barns. Sweep, scan feed, clean the environment area. Semen collection or breeding to catch boars on the road to check the boars and the barn, from work.
8. other
(l) Formulate a reasonable boar breeding program, establish good living habits, and carry out various operations such as feeding, sperm collection or breeding, sports, etc., at a fixed time, and use conditional reflex to develop a regular living system. Management operations.
(2) Prevent boars from biting and not allow two or more boars to be driven on the same walkway at the same time. In the event of a bite, the boar should be quickly removed and the boar must be led away or used to flush the boar. Eyes will be taken away, but also can be used to promote their separation.
(3) Boar training: The reserve boar is 8 months old and weighs 120 kg. Reserve the boars on the fence near the boar with strong breeding ability to observe and learn the breeding methods; when the first breeding, the proportion of male and female should be reasonable, the estrus status of the sows should be better, so that the sows do not climb the new boar In order to avoid affecting the active breeding of boars, they cannot push boars when they are mating, and they can't play boars.
(4) Reasonably weed out boars with poor production performance and poor semen quality. Boars with ill and abnormal limbs and excessive viciousness. Old boars.
(5) The boar will not be used for a long time, and the semen quality and libido will be reduced. The frequency of use of the boar should be adjusted during use.
(6) Pay attention to safety at work: Keep a distance from the boar during work, and do not turn away from the boar. When using the boar to try the situation, you need to pull the boar that is climbing from the back of the sow, and be careful. Do not push shoulders or head to prevent attacks. It is strictly forbidden to treat boars roughly.
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