1, prevent the introduction of the disease. Before introduction, it is necessary to understand in detail the epidemic situation in the breeding pig production area and confirm that there is no disease before it can be introduced. After the introduction of breeding pigs, the pigs cannot be released immediately, and at least the animals must be isolated and observed for more than 20 days. The disease-free pigs can be reared in groups.
2, consider blood relations. Breeding pigs may have blood relations with each other. Therefore, the breeder pedigree card should be brought back and kept for future reference.
3, the introduction of the number should not be too much. Under normal circumstances, it is sufficient to introduce two or three good breeds with different characteristics. Introducing 1-2 breeds of boars on small-scale pig farms, and systematically carrying out economic crosses with local sows to provide fattening piglets with heterosis, and it is fine to introduce too many varieties, which can easily lead to chaos and pedigrees. .
4. The introduced breeding pigs should adapt to the local natural conditions so as to avoid unadapted phenomena, easy to develop disease, unable to carry out normal breeding, and bring losses to production. In this case, indirect introductions can be introduced to introduce foreign pig breeds that have adapted to local natural conditions from other local farms.
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