Detailed and correct methods of boar semen collection

Training method

The observation method drives the young boar to the pen to be collected, and makes it observe the mating or sperm collection process of adult pigs and sows, and stimulates the sexual impulse of the young boar. After 3 to 4 times of observation, it climbs across the fake sow. After 2 ~3 times a week and 2 ~3 weeks of training, most young boars can collect sperm smoothly.

Estrus sow luring method to select estrus exuberant, obvious characteristics of the sow, so that the boar is trained to climb, such as the penis of the new boar out of the hand to hold the spiral part of the penis, rhythmic force to stimulate the penis, can collect semen.

The urine of oestrus sow is used to stimulate the urine of oestrus sow and vaginal secretions are smeared on the hind body of false sow to lure new boar to climb over false sow, most of which can make young boar smoothly let people collect sperm.

sperm collection facility

The semen collection cup requires good thermal insulation performance and is easy to carry. Cup or bottle made of various materials can be used as semen collection cup. Disposable paper cups with a capacity of 500 ml are available in warm areas. In cold areas, it is best to use double-insulated stainless steel or glass.

Filter paper or sterile gauze requires that the pores of the filter paper are about 100 microns, allowing sperm to pass through and filtering colloidal substances in semen. Semen filter paper covers the mouth of semen collection cup and fixes it with rubber band. Use 4 - 5 layers of sterile gauze to filter the colloidal particles in semen, but be sure to prevent cotton scraps from falling off the gauze, otherwise the semen quality will deteriorate.

Disposable gloves latex or plastic film can be, but do not allow substances that affect sperm survival.

The artificial sow is rolled into a steel plate, 95 cm long, 36 cm-40 cm wide, and can be raised or lowered. The rubber skin on the fake sow is slightly elastic, and the front end has a setting for the boar's forefoot to hold.

The anti-slip mat is 1.2 meters long, 1 meter wide and 2 cm-3 cm thick. It is a soft cushion with many small holes, equivalent to carpet. Put the antiskid mat on the ground behind the buttocks of the fake sow to prevent the boar from slipping and protecting the limbs and hooves of the boar during semen collection.

Sperm collection room equipment

Generally 4 m-4.5 m long, 3.5 m-4 m wide. The minimum area of sperm collection room is 12 square meters. Too small area, not only inconvenient operation, but also can cause personal accidents. Suitable collection room area, can let collect semen boar around false sow rotation, in order to stimulate boar sexual desire. One side of the semen collection room should have a passage connected to the boar house, and the other side should have a wall separated from the semen processing room. There is a small window with double glass in the wall, which is used to transmit semen. An ultraviolet lamp is installed in the middle of the small window, which can disinfect and sterilize to ensure that the semen treatment room is sterile. The sperm collection room is equipped with water pipes, pools, cleaning tools, etc.

The sperm collection room requires a quiet environment, flat ground, clean and hygienic, and is equipped with ultraviolet sterilization lamps or flame sterilizers. Requirements do not use irritating disinfectant, so as not to affect boar sexual reflex. In the collection room can play the sound recording of male and female mating. Make the environment exactly the same as when the male and female are mated.

A fence (made of steel pipes with diameters of 4 cm to 5 cm) with an area of 1.8 meters wide and 4 meters long is arranged at one end of the sperm collection room near the entrance of the sperm collection pen to be enclosed into 4 to 5 small rooms, so that boars waiting for sperm collection can stand and watch other boars collect sperm. Boar in the observation column stimulated sexual desire, open the door, boar will jump climb across the false sow, out of the penis, ready to mate, ejaculate soon. In this way, it can save the time of collecting sperm and improve the efficiency of collecting sperm.

The fence is erected at the four corners of the sperm collection room with steel columns (steel pipes with a diameter of 4 cm-6 cm) with a spacing of 18 cm-20 cm. People can pass sideways, but boars cannot pass through, ensuring the safety of sperm collection personnel when boars attack.

Basins and towels are used to clean the boar's underbelly to prevent semen contamination.

The sperm collection room shall be equipped with a tap water tank and water pipe for washing the floor. The wall of semen collection room is 1.8 meters high and is faced with ceramic tiles for easy cleaning and disinfection.

sperm collection method

Hand grip method Hand grip method is the most commonly used method for boar semen collection. Due to the convenience of operation, simple equipment, can be segmented semen, so widely used. The hand-holding method is that when the boar climbs across the pseudo-sow and the penis sticks out to prepare for mating, the spiral glans part of the penis is locked by hand to prevent it from rotating, and then the force is evenly applied rhythmically. The other hand holds a semen collection cup covered with semen filter paper to receive semen rich in sperm. The boar will pause for 1 - 2 minutes before ejaculating. Boar ejaculation is generally divided into 2 - 3 segments to complete.

False vagina method False vagina consists of outer tube, inner tube, rubber funnel, semen collecting bottle, double inflatable ball, rubber stopper and rubber band. The outer cylinder is made of hard plastic, about 30 cm long, 7 cm-8 cm in inner diameter, 20 cm away from one end has an inflation and water injection port, which can be connected with a switch and a double balloon. The other end of the false vagina can be connected to a semen collection bottle. The false vagina inner tube requests the elasticity to be strong, has the network structure, can rub the penis, produces the pleasure, stimulates the ejaculation. Inner tubes are required to last. Before semen collection, install artificial vagina, inject hot water above 40℃, measure and adjust the temperature of inner tube at 38℃-39℃, connect double-connected balloon to inflate, and then coat a layer of special biological lubricant on inner tube. In order to avoid boars start to ejaculate sperm bacteria, sperm less, do not start to connect to the collection bottle, such as ejaculation of milky white thick semen by the assistant connected to the collection bottle, semen collection. Pseudovaginal semen collection is suitable for cold seasons and high latitudes.

Tube grip tube grip consists of a sponge sleeve forming a tube shaped sperm collector, funnel-shaped. Boar penis out, with the sleeve around the head of the penis, with the hand rhythmically apply pressure, similar to the hand grip method semen collection. The advantage of this method is that it does not need to disinfect and clean the arm, and the sponge sleeve is disposable, eliminating cumbersome cleaning procedures.

Electrical stimulation is suitable for excellent boars with damaged hind limbs. The electrostimulation sperm collector consists of pulse current generator and probe. When in use, the boar is injected with sedatives (sedative or anesthesia can be used such as Jingsongling and ketamine), then the probe is coated with lubricant and inserted into the boar rectum, the current is switched on, the frequency is adjusted from low to high, and the stimulation intensity is increased until ejaculation is smooth.

No matter which method is used to collect semen, it is necessary to prevent preputial fluid from mixing with semen. Preputial fluid sometimes drips onto the penis and flows down the penis into the semen collection cup to kill sperm. To prevent prepuce dripping into the collection cup can be sterile tissue wrapped penis.

Sperm collection process boar ejaculation process takes about 5-10 minutes, to be patient. After semen collection, boars should naturally climb down false sows. Best to reward boar. Feed 1 - 2 eggs, so that boars develop conditioned reflex, in order to collect sperm. The sperm collector collects semen and transmits it to the semen processing room through the semen delivery window. Both sides of the window have movable glass, above which infrared lamps are installed to kill bacteria. Open one side of the glass and put it into the semen collection cup. Close it immediately. Open the other side of the glass to keep the semen processing chamber in a relatively sterile state.