First, the kind of situation Pietrain pigs originated in the town of Pietland in Belgium's Houghite area, hence the name Pietrain. Pitlan is one of the most lean breeds in the lean pig breeds in the world. It began cultivation in 1920 and was developed in Wolong in 1950. During the breeding process, the local pigs were crossbreed with French shellfish, and imported into the blood of the Thai Tamworth pigs. China was introduced from the 1980s, and the Institute of Animal Husbandry of the Shanghai Academy of Agricultural Sciences introduced French legal system Pietrain from France in the early 1990s. Beijing Shunxin Agricultural Shop The original Lee Pig Breeding Farm introduced 47 direct from Belgium in 1997, including 33 sows and 16 boars and 8 pedigrees. In 2000, Pitland was introduced from France and 27 boars were born. Second, the appearance of appearance Pitlan was a large black and white flowers, coat color from gray to maroon or between red, ears, medium and slightly tilted down, body width short, wide back in the middle, there is a deep groove, rear fullness, muscular, muscle It is apparently obvious in the community that the posterior blood vessels are exposed and the limbs are short and fine (but the current introduction of the lineage, the legal system Pietrain, the upper and lower extremities are taller and thicker), the dog's abdomen, and the head is delicate. Third, production performance 1, reproductive performance of medium reproduction, litter size, generally 9-11 head, nursery ability, maternal good, lactation early milk is good, high milk yield, late lactation poor, 20 days old Wo Weight 48.52.3 kg, 35 days old nest weight 87.74.8 kg. 2. Finishing Performance Pietrain pigs have low feed intake and slow late growth. According to the information, the low feed intake is due to the low physiological insulin level. During the fattening period, the average daily weight gain was 720 grams, and the feed ratio was 2.8:1. 3, carcass traits thick muscle fibers, fleshy meat taste is poor, but the introduction of the Belgian Pielan slaughtered after the discovery of PSE meat, carcass lean meat 78%, meat rate of 83%, three back fat 0.5cm thick. Management Considerations 1. Stress The latest introduction of the Belgium Pietrain genotype to CT is less sensitive to stress, but intense irritation still causes stress, so the following points should be noted in daily production: (1) Boars When participating in breeding, there must be proper exercise time. (2) When the pigs are turned around, try to make original nests, and the pigs should be firm to prevent fighting. (3) When the pig walks, it should try to hurry and rush, and it must not be forcibly driven or strenuous exercise. (4) It is best to have litters on the ground to give birth, and then go into bed after giving birth. (5) In the hot summer season, cooling facilities such as electric fans and conditional installable air conditioners should be provided for male and female sows, especially litter sows. (6) During transportation, excessive crowding, overheating or good ventilation should be avoided. Do not force binding when getting on and off the train. You can inject a sedative before transportation. (7) If stress is found, stop stimulation immediately, keep quiet, pour cold water on the neck, water slowly, and do not spray it all over the body. Do not inject sedative drugs when stress occurs. 2. Dystocia Piltland pigs are more likely to have a difficult-to-produce sows during their first-mother sows (rarely seldom-born sows). The reason is that the back muscles are full and the birth canal is incompletely opened. The countermeasures to prevent it from occurring are: (1) To extend the mating age, the initial period of the Pietrain is generally 8 months, and the apparent weight of the mating month should be 11-12 months. (2) Strengthen the exercise during the second and third trimesters, and the nutrient concentration should not be too high. (3) Use prostaglandins to increase calving by 1-2 days than the expected date of birth. It is better to control the calving during the day and facilitate midwifery (usually on the same day.) One shot in the morning and the next day begins to give birth.) (4) When dystocia occurs, midwifery should be performed. Midwives should not be in a hurry, nor can they damage the birth canal. Arms and midwifery instruments must be thoroughly disinfected, and the number of arms entering the birth canal should be minimized. The uterus should be flushed within 7 days after birth to reduce inflammation. Prevent the next estrus or breeding difficulties. (5) When leaving a seed, try not to select those pigs with hindquarters that are too small and have a small cunt as a gilt. 3, to prevent the leg disease Pietrain before and after the heavy negative limbs, and do not like exercise, prone to leg problems. Exercise should be strengthened to ensure that each pig is more than 1 hour per day, especially pigs in the middle and late stages of fattening. In addition, the stocking density cannot be too great. Conditional breeding can be carried out outside or grassland. Relieve the parts of the wearer when they are lying and promptly treat them. 5. Hybridization Pietralan is an ideal terminal cross male parent, which can obviously increase the lean meat percentage and the fullness of the hindquarters. The general hybridization methods are: Pidu, the skin grows, the skin is big, Pidu grows up, the skin local pig Species. 6. Nutritional requirements Since the petrified pig has a low fat content and its own fat stores are insufficient, high energy is very important when formula feeds are fed (other nutritional traits are being explored). The nutrition requirements table attached to my farm is for reference only. 7. Conclusion Although the Pietrain pig is prone to many problems in feeding and management, there are also many deficiencies in the performance in production, but it can not be replaced as a superior terminal male parent of any breed of pigs, as long as we in the daily production management To create certain conditions and constantly explore and explore these problems and shortcomings are solutions. China Agricultural Network Editor