Grasp the breeding and management of boars. The boars must be fed special feed for boars and fed twice a day, feeding 2.5 kg to 3 kg per head per day, 1 egg, and 2 kg to 3 kg of green feed per day. The temperature of the boar can not exceed 28°C (above 28°C adversely affecting the sperm), keep the pens and the pigs clean, and remove the boars from the pens every morning for 30 minutes.
Strict semen quality. After the semen is collected, first look at the semen volume, color, and odor (the amount of ejaculate in the normal semen is generally 150 ml to 300 ml, the color is milky white or light gray, with a slight smell). If the sense is normal, it should be immediately performed. Microscopic examination, fresh sperm can achieve dilution above 0.7, otherwise it is abandoned. Semen should be diluted as soon as possible after collection, and the original sperm will not be stored for more than 30 minutes. Diluted with semen-specific diluent. When diluting, dilute the temperature of the diluent to the temperature of the semen. Slowly pour the diluent into the semen as the semen of the semen is poured into the semen. Gently shake it to mix it and then dispense it.
Semen preservation. The ambient temperature for storing semen must be controlled between 11°C and 17°C. The temperature difference between day and night should not exceed 2°C. It is best to use a 17°C constant temperature freezer. Diluted and packed semen first room temperature (22 °C ~ 25 °C) 1 hour after several layers of towels wrapped directly into a 17 °C incubator to save. During semen preservation, the semen should be shaken once every 12 hours to prevent the death of spermatozoa and the storage period should not exceed 3 days.
Semen storage during insemination. Cold winter or hot summer semen can not be exposed for too long in the outside world (because cold stress or heat stress will affect the quality of sperm), in the winter insemination should be placed in the palm of your hand semen for 2 minutes to 3 minutes, In order to avoid semen temperature is too low and cause semen backflow. Semen transport should be stored in a foam box, cool water in summer and warm in winter.
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