I. Formulating a scientific and rational introduction plan A scientific and reasonable introduction plan should be established according to the actual situation of the farm prior to introduction. The plan includes breeding pig breeds (Dabai, Changbai, Pietrain, Duroc) and breeding pigs (original species, ancestors). Parental generation), number of introductions (related to the formation of the core group), etc. It is necessary to select large-scale breeding farms that can provide healthy, disease-free and high-quality breeding pigs.
2. Pre-introducing preparations Before the introduction, the isolation house should be thoroughly washed, disinfected and left empty for at least one week. The isolation should be far away from the existing herds. A loading hog can be designed so that the pigs can be unloaded into the pit without entering the field, which is both convenient and prevents the introduction of disease.
Third, the selection of gilts points 1 weight should be less than 60 kg, with the characteristics of this species (brown, head type, ear type, etc.), looks handsome. 2 The nipples are arranged neatly and evenly with a certain distance. There are no invalid nipples (sacral nipples, inverted nipples, and inverted nipples). 3 The vulva is large and sagging. Smaller and upturned sows are often the manifestations of poor reproductive organs.
Fourth, the selection of points for the reserve boar 1 testicular development, the outline is obvious, symmetry, the same size, there is no single testis, cryptorchidism or Helnia. 2 There was no significant accumulation of urine in the foreskin. 3 Has obvious male characteristics and strong limbs.
V. After all necessary procedures have been completed, reloading and transporting pig vehicles should be fully flushed and thoroughly disinfected before departure and after reaching the breeding farm. It can be completely washed with 2%~3% fire alkali solution and rinsed with clean water (otherwise it will burn the skin of the pig). Carry some padding (such as sand, sawdust, etc.) properly in the pig car to prevent it from slipping. It is necessary to carefully check the qualification of the introduction quarantine certificate and disinfection certificate. Adequate drinking water should also be prepared during the summer (do not use watermelons, fruits, vegetables, etc. as far as possible, because these may cause diarrhea in pigs). Long-acting broad-spectrum antibiotics can be given to pigs before getting on the train to increase the pig's resistance. For particularly disturbing pigs, sedatives can be injected.
6. Precautions after arrival of breeding pigs After the arrival of a pig on the site, the pig's body surface and transportation equipment shall be completely sterilized with a small irritating disinfectant, washed clean with clean water, and then entered the isolation house.
Do not feed for 12 hours. Let the pig rest and supply drinking water in a small number of ways. You can add oral rehydration salts or electrolytic cubes to your drinking water. After 12 hours, the pigs were fed in small amounts and gradually, and the normal feeding amount was reached within 3 to 5 days. 2 If the breeder has mild diarrhea, constipation, cough, fever and other symptoms, it is generally a normal stress reaction, do not be nervous. In order to reduce the diseases caused by stress, drug prevention can be added to the feed, such as chlorogenic acid and chlortetracycline, for two weeks. After the three pigs arrive at the site for one week, the necessary immunizations (porcine warts, pseudorabies, porcine parvovirus, etc.) should be performed according to the local epidemic situation, the vaccination situation in the field, and the blood quarantine status. A certain interval, so as not to cause immune pressure, so that the immune failure. In addition, insecticides should be performed twice before breeding, and the insect repellent can be selected from ivermectin or abamectin. After 4 and a half months, the feces of the weaned piglets in the original pig herd can be mixed into the feed to feed the introduced pigs 3 to 4 times, and the feces of the original pig herds can also be placed in the isolation room. After a period of observation no abnormalities occurred. The breeding pigs were thoroughly sterilized and transferred to the production area.