Introduction is an important task for the improvement of pig breeds. The contribution rate of breeds to the technological advancement of pig production accounts for 40%-50%, while the pig production in China is still in the stage of traditional pig production. With the process of China's reform and opening up, large-scale cultivation has emerged. Pigs, introducing advanced pig raising technology from the United States and the United Kingdom, and introducing excellent international varieties such as Duroc, Landrace, Dabai and Pietrain, have significantly improved pig production in China, and the pig slaughter rate is less than 100% before reform and opening up. It has increased to 130-140% now, and these achievements can be attributed to the improvement of pig production technology and the effect of variety improvement. Therefore, the breed is the key to raising the pig raising level. Choosing the excellent variety in the pig raising system is an important work that cannot be ignored. The introduction of a plan and the use of the seed are the preconditions for the success of pig raising. 1 Introduction of basic principles The introduction of large-scale swine breeding is a continuous work, with at least four important basic principles. First, to maintain a good reproductive capacity of the population, sows are updated about 30% annually, and boars are updated 40%-50%. Second, continue to introduce excellent genes to improve the production performance and sales competitiveness of herds. Third, each introduction should consider minimizing the risk of introducing disease. Fourth, take the most effective introduction method and the best time. 2 Introduction steps First, the pig farm itself carries out a detailed plan for the production of the farm, which is generally a five-year production plan. Correspondingly, it needs the needs of stocks and breeds, and at least three years of introduction and variety improvement programs, from the reality. Looking at the situation, this work needs to be conducted under the guidance of experts. Second, select the correct method of introduction and introduction time, implement 100% artificial insemination in the venue, reduce the number of introduced boars and improve the quality of introduction. For non-breeding groups, if only for production of parental sows or dual sows, introduce The progenitor pig semen is both economical and effective. Third, the newly introduced organic combination with the original population, regardless of the quality of the species or health status, the newly introduced breeding pigs will have advantages, and should strictly abide by the correct breeding programs and breeding methods to ensure that the varieties play their advantages. 3 Introduce specific practices 3.1 Preparation 1 Introduction program. According to the actual situation of the farm and the population renewal plan, determine the varieties and quantities needed, and selectively purchase the fine individuals that can improve the performance of the breeding pigs, meet their own requirements, and have the same health status as their own pigs; For breeding into the core population, boars or breeding sows that have been tested for performance performance should be purchased. The new farm should plan from the aspects of the scale of production of the farm, the product market and the direction of the future development of the farm, and determine the number, breed and level of pigs introduced, whether exotic or local breeds, or whether it is an ancestor or a parental generation. According to the introduction program, select high-quality, reputable breeding farms. 2 understand the specific situation. Epidemics: To investigate the prevalence of epidemics and the quality of pigs in various farms, pigs must be introduced from areas where epidemics are not endangered, and where breeding pigs are known in detail. At the same time, the immunization procedures and other specific measures for the farms must be known. . Breeding standards for the breeder breeding pigs: the boars need to understand the growth rate, feed conversion rate, lean meat and other indicators, the sow to understand its reproductive performance. It is advisable to select seeds for the breeding farms in combination with the comprehensive selection index of the breeding pigs, especially when introducing breeding pigs from abroad. 3 introduction applications. According to the current national laws and regulations, in accordance with the needs of the production development of the field and their own situation, the superior department in charge introduced the application for breeding pigs, explained the reason for introducing the breeding pigs, introduced the species, quantity, production performance, and production field name of the breeding pigs, and obtained them. The breeding pigs can only be introduced after approval by the higher authorities. 4 Isolation preparation. The pig farm should be equipped with isolation rooms. It requires a distance of more than 300 meters from the production area. 30 days before the breeding pig arrives, and at least 7 days, the disinfectant with good quality should be selected, and the isolation fence and utensils should be strictly sterilized. . 3.2 Attention when selecting seeds The pigs are required to be healthy, free of any clinical signs and genetic disorders, have good nutritional status and normal development. The limbs require a reasonable structure, strong and strong, the appearance of the body should meet the characteristics of the breed and the requirements of the field, the ear number is clear, and the pure breed pigs should be labeled with ear tags. For identification. The boars require that the testicles be well-proportioned and there is no more effusion in the foreskin. The reproductive organs of the sow are required to develop normally. The vulva should not be too small and upturned. Individuals with large vulvaes and sagging should be selected. The effective nipples should be no less than six pairs, and the distribution should be symmetrical and without nipples. Requires the farm to provide the immunization program and the status of the swine immunization purchased, and indicate the dates of various vaccine injections. It is advisable to sell the boars after measurement, together with the data and the third generation pedigree of the breeding pigs. Sales of breeding pigs must be tested by the veterinarian clinically without swine fever, No. 5 disease, wilt, brucellosis, circovirus disease and other diseases, and the veterinary quarantine department issued a quarantine certificate. 3.3 Pig Transportation Considerations Breeding pigs is the most troublesome process in the introduction of breeding pigs. It must ensure that roads along the road are unimpeded, no disasters occur, there is no epidemic along the way, vehicles are in good condition, and vehicles and utensils should be used with efficient disinfectants starting 24 hours before breeding pigs. More than two times of strict disinfection, it is best to vacate a day after the pig, before loading pigs and then disinfectants with a less irritating disinfectant once, and open a good disinfection certificate. In the transportation process, special attention should be paid to reducing the stress and damage of the pigs to the limbs and feet, and avoiding the death and infection of the disease during transportation. It is required to stop the feed for the breeding pigs to be transported 2-3 hours in advance. When catching pigs on the train, you can't rush too fast. Pay attention to protecting the pig's limbs. Fix the door after loading the pig. For long-distance transport vehicles, it is advisable to have carpeting in the carriage, straw and wheat bran in winter, fine sand in summer, so as to reduce the possibility of limb and hoof damage in breeding pigs; Too dense will cause squeezing and cause the death of breeding pigs; the carriages carrying the breeding pigs will be divided into several partitions, and 4-6 pigs will be arranged as a barrier. The fences are best made of smooth water pipes to avoid scratching the breeding pigs. Boars that have reached sexual maturity should be separated and sprayed with a disinfectant with a stronger odor to prevent boars from biting each other. For long-distance transportation of breeding pigs, one long-acting antibiotic should be injected into each pig to prevent bacterial infections on the way to the pigs. For pigs that are particularly excited about clinical manifestations, suitable chlorpromazine and other sedatives can be injected. For long-distance transportation, each vehicle should be equipped with two drivers to drive alternately. During the driving process, sudden braking should be avoided as much as possible. During the journey, care should be taken to select places where other animal-carrying vehicles are not parked, and it must not be parked together with other vehicles that transport pigs; Some necessary tools and medicines should be prepared, such as ropes, iron wire, forceps, antibiotics, analgesic antipyretics and sedatives. Winter should pay attention to keeping warm, summer should pay attention to heatstroke, should be avoided in the hot noon loaded pigs, can be shipped in the morning and evening, after the pig is loaded, rinse with clean water, the amount of water to be washed, cool, and finally Wind oil is sprayed immediately after being sprayed on the head of the pig; on the way, regular supply of drinking water should be noted. Water can be prepared for the breeding of pigs if conditions permit, to prevent breeding pigs from suffering heat stroke, and to seek reliable water sources for the cooling of the breeding pigs. 3-6 times. Pig transport vehicles should be provided with car tarpaulins. If there is a hot sun or storm, the tarpaulin should be covered on the top of the roof to prevent direct sunlight and storms from hitting the breeding pigs. The tarpaulins on both sides of the carriage should be suspended for ventilation and cooling. The tarpaulin should be hung above the front of the compartment to keep the wind warm. For long-distance transportation, some electrolyte solutions may be prepared first, and then powdered milk may be used for feeding the pigs on the road. During the transportation, it is necessary to stop at a proper time to check whether there are pigs for injuries or not. It is best to prepare a spare car for a large number of transports so as to avoid malfunctions of the pigs and long delays in causing unnecessary losses. Attention should be paid to the observation of the pigs. If there are abnormalities such as rapid breathing or elevated body temperature, effective measures should be taken in time. Injectable antibiotics and antipyretic analgesic injections should be used. The body of the pig should be cooled with a low-temperature clean water, and the tip of the pig can be used if necessary. Bloodletting therapy. 3.4 Management of Breeding Pigs on the Field Newly introduced breeding pigs should first be kept in the isolation house, and they cannot be directly transferred to the production area of ​​the pig farm, because the introduction is likely to bring about new diseases, or different strains can cause the same disease. After the breeding pig arrives at the destination, it immediately disinfects the unloading platform, the vehicle, the pig body and the ground around the unloading vehicle. The breeding pigs are then unloaded, and the animals are sorted by size, male and female, and the sick pigs should be promptly treated and treated. Pigs were given drinking water first, and only a small amount of feed was provided after 6-12 hours of rest. The amount of feed was gradually increased from the second day, and the normal feeding amount was restored after 5 days. In the first two weeks after the arrival of the breeding pig, due to fatigue and environmental changes, the body's resistance to the disease is reduced. Feeding management should be strengthened to minimize stress, and antibiotics and vitamins can be added to the feed to restore the pigs as soon as possible. status. After one week of breeding pigs, all kinds of vaccines such as swine fever and No. 5 disease should be vaccinated according to the immunization procedure. The 7-month old breeding pigs can do some immunizations during the period to avoid abortion, stillbirth, and mummy diseases. Viral disease, Japanese encephalitis vaccine, etc. In the isolation period, the breeding pigs should be fully dewormed after vaccination. After the end of the isolation period, in accordance with the requirements, the competent authority at a higher level is required to quarantine and collect blood from the imported pigs in the isolation pig house. After confirming that there is no prescribed disease, the body of the batch of pigs is disinfected and transferred to the production area for normal production. Circular UV Lamp, Quartz UV Lamp, UV Lamp Manufacturer Ningbo Sunfine UV lighting Co.,ltd. , http://www.uvlightings.com