Problems with boar semen collection
As we all know, artificial insemination has two sides, and it is well applied. It can make a great contribution to the improvement of pig breeds and can create considerable economic benefits. If it is not applied well, it will not only create benefits but also cause disasters. The author visited more than 40 farms in Guangdong, Guangxi, Jiangxi and Fujian provinces in 2004 and found that there are still some problems in pig farms with artificial insemination, especially in smaller pig farms. More and more serious. The issues that should be noted in the collection of boar semen are described below:
Training method
1. Observe the law: arranging the training boars to wait until the sperm collecting column, allowing them to observe the mating or sperm extraction process of adult pigs and sows, and stimulate sexual impulses of young boars. After 3-4 observations, Let it crawl across the fake sow. In this way, after 2-3 times a week for 2-3 weeks of training, most small boars can successfully collect sperm.
2, estrus sows inducement method: Select heat-producing sows with obvious estrus, sows with obvious symptoms, allow the bouncing boar to climb, and wait for the penis of the new boar to hold the penis after his hand and hold the rhythm. Stimulate the penis and collect the semen.
3. Inspire with the urine of the gilt sow: Spray the urine and vaginal secretions of the estrus sow on the hindquarters of the fake sow to lure the new boar to cross the fake sow. Most of them can make the small boar smooth. Picking.
Semen collection facilities
1. Harvesting cup: It requires good insulation performance and is easy to carry. Cups or bottles made of various materials can be used as harvesting cups. 500 ml disposable cups are available in warm areas. In cold areas, it is best to use double-insulated stainless steel or glass.
2. Filter paper or sterile gauze: It is required that the micropores of the filter paper should be about 100 microns so that the sperm can pass through and filter the gelatinous substances in the semen. Semen filter paper covers the mouth of the collection jar and is secured with rubber bands. Use 4-5 layers of sterile gauze to filter the gel material in the semen, but be sure to prevent the lint from falling off in the gauze, otherwise the semen quality will deteriorate.
3, disposable gloves: latex or plastic film can be, but does not allow substances that affect the survival of sperm.
4, false sows: steel roll, length 95 cm, width 36-40 cm, height can be raised and lowered. The rubber covering on the false sow is slightly flexible, and the front end has a better setting for the forefoot of the boar.
5, non-slip mat: 1.2 meters long, 1 meter wide, 2 to 3 centimeters thick rubber made of non-slip mat, is a kind of cushion with many holes, the equivalent of carpet. Place the anti-slip mat on the ground behind the buttock's buttocks to prevent the boar from slipping during semen collection and protect the boar limbs.
Chest chamber equipment is generally 4-4.5 meters long and 3.5-4 meters wide. The minimum area of ​​the sperm chamber needs 12 square meters. If the area is too small, not only is it inconvenient to operate, but it also causes personnel accidents. The appropriate chamber size allows boars to be swept around the fake sow to stimulate boar libido. On the one side of the chamber, there must be a channel that connects with the barn and on one side there is a wall separated from the semen chamber. There is a double-glazed window on the wall to deliver semen. An ultraviolet lamp is installed in the middle of the small window, which can be sterilized and sterilized to ensure the sterility of the semen processing room. The collection room is equipped with water pipes and sinks, cleaning tools and so on.
1. The sperm collection room requires quiet environment, flat ground, clean and sanitary, and equipped with ultraviolet sterilizing lamp or flame sterilizer. Requires no irritating disinfectant, so as not to affect boar sexual reflexes. In the collection room can be installed to play sound recordings when the male and female pigs are mated. It is the same when the environment is completely mated with male and female sows.
2, to collect the column: At the end of the sperm chamber, close to the entrance to set a fence with an area of ​​1.8 meters wide and 4 meters long (made of 4-5 cm diameter steel pipe), surrounded by 4-5 small In the meantime, let the boar waiting to pick up stand up and watch the other boars. The boar stimulates libido in the viewing column. Once the gate is opened, the boar will jump across the fake sow, flexing his penis, preparing for mating, and ejaculation soon. In this way, the time for picking can be saved and the efficiency of sperm collection can be improved.
3, fence: in the mining room of the four corners with steel columns (diameter of 4-6 cm steel pipe) erected, spacing 18-20 cm, the person can pass sideways, and the boar can not pass, to ensure protection during boar attacks Securing personnel safety.
4, basins and towels: used to clean the boar's lower abdomen to prevent semen contamination.
5. The sperm collection room needs to be equipped with a fresh water pool and water pipes to prepare for flushing the ground. The chamber wall is 1.8 meters high to the ground and is tiled to facilitate cleaning and disinfection.
Collection method
1. Hand-holding method: Hand-holding method is the most commonly used method for collecting boar semen. Because of its easy operation, simple equipment, and semen access, it is widely used. The method of grasping is that after the boar crosses the false sow and the penis is ready for mating, the head of the penis spiral is locked by hand and is not allowed to rotate, and then rhythmically and evenly, the other hand holds the upper cover. The sperm collection cup with the filter semen filters is used to access semen-rich semen. Breeding the boar will pause for 1-2 minutes and then ejaculate again. Boar ejaculation is usually done in 2-3 stages.
2, fake vaginal law: false vagina by the outer tube, inner tube, rubber funnel, collection bottles, double inflatable ball, rubber plug and rubber map. The outer cylinder is made of rigid plastic and has a length of about 30 cm, an inner diameter of 7-8 cm, and an inflation and water injection port at a distance of 20 cm from one end. The switch can be connected to a double balloon. The other end of the false vagina can receive a sperm bottle. Pseudo-vaginal tubes require strong elasticity and a reticular structure that can rub the penis and produce pleasure and stimulate ejaculation. Inner tubes require durability. Before harvesting, install a false vagina, inject hot water above 40°C, measure and adjust the inner tube temperature at 38°C-39°C, and then inflate the double balloon, then apply a special layer of bio-lubricant to the inner tube. . In order to avoid the bacteria in the semen that the boar starts to shoot and the spermatozoa is small, do not start to collect the sperm bottle. When the milky white thick semen is injected, the assistant collects the sperm bottle to collect the semen. Fake vaginal ejaculation is adapted to cold seasons and high latitudes.
3, tube grip method: tube grip method consists of a sponge sleeve cylindrical seizure device, was funnel-shaped. After the boar's penis is stretched out, use a sleeve to put it on the head of the penis and apply pressure rhythmically by hand. The advantage of this method of sperm extraction is that the arm is not disinfected and cleaned, and the sponge sleeve is disposable, eliminating tedious cleaning procedures.
4. Electrical stimulation method: Excellent boar for injured hind limbs. The electrical stimulation seizure device consists of a pulsed current generator and a probe. When used, the boar is injected with a sedative sedative (stabilized or anesthetized with static pine, ketamine, etc.), then the probe is coated with lubricant and inserted into the rectum of the boar, the current is switched on, and the stimulation frequency is increased by adjusting the frequency from low to high. Until smooth ejaculation.
Regardless of the method used for sperm collection, the foreskin solution should be prevented from entering the semen. The foreskin solution can sometimes drip onto the penis and flow along the penis into the collection cup to kill the sperm. To prevent the foreskin from dropping into the collection cup, it is possible to wrap the penis with a sterile paper towel.
5, the sperm extraction process: boar ejaculation process takes about 5-10 minutes, to be patient. After the harvesting, the boar is allowed to naturally climb off the fake sow. It is best to reward boars. Feed 1-2 eggs, so that the boar develop conditioned reflexes to facilitate sperm retrieval. The sperm picker picks up the semen. The semen is transferred to the semen processing chamber through the "hand-finishing window". There are movable glass on both sides of the “handing windowâ€, with infrared lamps above it to kill bacteria. After opening a glass, the glass is closed immediately after being placed in the collection cup, and the other side of the glass is opened to maintain a relatively sterile state in the semen processing chamber.
Training method
1. Observe the law: arranging the training boars to wait until the sperm collecting column, allowing them to observe the mating or sperm extraction process of adult pigs and sows, and stimulate sexual impulses of young boars. After 3-4 observations, Let it crawl across the fake sow. In this way, after 2-3 times a week for 2-3 weeks of training, most small boars can successfully collect sperm.
2, estrus sows inducement method: Select heat-producing sows with obvious estrus, sows with obvious symptoms, allow the bouncing boar to climb, and wait for the penis of the new boar to hold the penis after his hand and hold the rhythm. Stimulate the penis and collect the semen.
3. Inspire with the urine of the gilt sow: Spray the urine and vaginal secretions of the estrus sow on the hindquarters of the fake sow to lure the new boar to cross the fake sow. Most of them can make the small boar smooth. Picking.
Semen collection facilities
1. Harvesting cup: It requires good insulation performance and is easy to carry. Cups or bottles made of various materials can be used as harvesting cups. 500 ml disposable cups are available in warm areas. In cold areas, it is best to use double-insulated stainless steel or glass.
2. Filter paper or sterile gauze: It is required that the micropores of the filter paper should be about 100 microns so that the sperm can pass through and filter the gelatinous substances in the semen. Semen filter paper covers the mouth of the collection jar and is secured with rubber bands. Use 4-5 layers of sterile gauze to filter the gel material in the semen, but be sure to prevent the lint from falling off in the gauze, otherwise the semen quality will deteriorate.
3, disposable gloves: latex or plastic film can be, but does not allow substances that affect the survival of sperm.
4, false sows: steel roll, length 95 cm, width 36-40 cm, height can be raised and lowered. The rubber covering on the false sow is slightly flexible, and the front end has a better setting for the forefoot of the boar.
5, non-slip mat: 1.2 meters long, 1 meter wide, 2 to 3 centimeters thick rubber made of non-slip mat, is a kind of cushion with many holes, the equivalent of carpet. Place the anti-slip mat on the ground behind the buttock's buttocks to prevent the boar from slipping during semen collection and protect the boar limbs.
Chest chamber equipment is generally 4-4.5 meters long and 3.5-4 meters wide. The minimum area of ​​the sperm chamber needs 12 square meters. If the area is too small, not only is it inconvenient to operate, but it also causes personnel accidents. The appropriate chamber size allows boars to be swept around the fake sow to stimulate boar libido. On the one side of the chamber, there must be a channel that connects with the barn and on one side there is a wall separated from the semen chamber. There is a double-glazed window on the wall to deliver semen. An ultraviolet lamp is installed in the middle of the small window, which can be sterilized and sterilized to ensure the sterility of the semen processing room. The collection room is equipped with water pipes and sinks, cleaning tools and so on.
1. The sperm collection room requires quiet environment, flat ground, clean and sanitary, and equipped with ultraviolet sterilizing lamp or flame sterilizer. Requires no irritating disinfectant, so as not to affect boar sexual reflexes. In the collection room can be installed to play sound recordings when the male and female pigs are mated. It is the same when the environment is completely mated with male and female sows.
2, to collect the column: At the end of the sperm chamber, close to the entrance to set a fence with an area of ​​1.8 meters wide and 4 meters long (made of 4-5 cm diameter steel pipe), surrounded by 4-5 small In the meantime, let the boar waiting to pick up stand up and watch the other boars. The boar stimulates libido in the viewing column. Once the gate is opened, the boar will jump across the fake sow, flexing his penis, preparing for mating, and ejaculation soon. In this way, the time for picking can be saved and the efficiency of sperm collection can be improved.
3, fence: in the mining room of the four corners with steel columns (diameter of 4-6 cm steel pipe) erected, spacing 18-20 cm, the person can pass sideways, and the boar can not pass, to ensure protection during boar attacks Securing personnel safety.
4, basins and towels: used to clean the boar's lower abdomen to prevent semen contamination.
5. The sperm collection room needs to be equipped with a fresh water pool and water pipes to prepare for flushing the ground. The chamber wall is 1.8 meters high to the ground and is tiled to facilitate cleaning and disinfection.
Collection method
1. Hand-holding method: Hand-holding method is the most commonly used method for collecting boar semen. Because of its easy operation, simple equipment, and semen access, it is widely used. The method of grasping is that after the boar crosses the false sow and the penis is ready for mating, the head of the penis spiral is locked by hand and is not allowed to rotate, and then rhythmically and evenly, the other hand holds the upper cover. The sperm collection cup with the filter semen filters is used to access semen-rich semen. Breeding the boar will pause for 1-2 minutes and then ejaculate again. Boar ejaculation is usually done in 2-3 stages.
2, fake vaginal law: false vagina by the outer tube, inner tube, rubber funnel, collection bottles, double inflatable ball, rubber plug and rubber map. The outer cylinder is made of rigid plastic and has a length of about 30 cm, an inner diameter of 7-8 cm, and an inflation and water injection port at a distance of 20 cm from one end. The switch can be connected to a double balloon. The other end of the false vagina can receive a sperm bottle. Pseudo-vaginal tubes require strong elasticity and a reticular structure that can rub the penis and produce pleasure and stimulate ejaculation. Inner tubes require durability. Before harvesting, install a false vagina, inject hot water above 40°C, measure and adjust the inner tube temperature at 38°C-39°C, and then inflate the double balloon, then apply a special layer of bio-lubricant to the inner tube. . In order to avoid the bacteria in the semen that the boar starts to shoot and the spermatozoa is small, do not start to collect the sperm bottle. When the milky white thick semen is injected, the assistant collects the sperm bottle to collect the semen. Fake vaginal ejaculation is adapted to cold seasons and high latitudes.
3, tube grip method: tube grip method consists of a sponge sleeve cylindrical seizure device, was funnel-shaped. After the boar's penis is stretched out, use a sleeve to put it on the head of the penis and apply pressure rhythmically by hand. The advantage of this method of sperm extraction is that the arm is not disinfected and cleaned, and the sponge sleeve is disposable, eliminating tedious cleaning procedures.
4. Electrical stimulation method: Excellent boar for injured hind limbs. The electrical stimulation seizure device consists of a pulsed current generator and a probe. When used, the boar is injected with a sedative sedative (stabilized or anesthetized with static pine, ketamine, etc.), then the probe is coated with lubricant and inserted into the rectum of the boar, the current is switched on, and the stimulation frequency is increased by adjusting the frequency from low to high. Until smooth ejaculation.
Regardless of the method used for sperm collection, the foreskin solution should be prevented from entering the semen. The foreskin solution can sometimes drip onto the penis and flow along the penis into the collection cup to kill the sperm. To prevent the foreskin from dropping into the collection cup, it is possible to wrap the penis with a sterile paper towel.
5, the sperm extraction process: boar ejaculation process takes about 5-10 minutes, to be patient. After the harvesting, the boar is allowed to naturally climb off the fake sow. It is best to reward boars. Feed 1-2 eggs, so that the boar develop conditioned reflexes to facilitate sperm retrieval. The sperm picker picks up the semen. The semen is transferred to the semen processing chamber through the "hand-finishing window". There are movable glass on both sides of the “handing windowâ€, with infrared lamps above it to kill bacteria. After opening a glass, the glass is closed immediately after being placed in the collection cup, and the other side of the glass is opened to maintain a relatively sterile state in the semen processing chamber.
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