With the development of the swine industry, the exchange of breeding pigs has become more frequent. Breeding pigs have been introduced throughout the country. Even in the breeding farms, frequent introductions are needed to update the blood source and improve the quality of breeding pigs. Introduced from foreign countries need to pay attention to the following points:
1. We must guard against the introduction of the disease: Before introduction, we must learn more about the epidemic situation in the introduced regions. We can first quarantine the blood diseases of some infectious diseases that are highly endangered, and confirm the introduction before confirming health. Introduced transport vehicles should be strictly disinfected. After the pigs have been re-introduced, they must be isolated and observed for at least 30 days. After the quarantine is confirmed to be free of disease, they will be immunized after being immunized with the immunization procedures in this field.
2. Consider the kinship: When updating the herd of blood, the number of pigs introduced should not be too high. Individuals should avoid kinship and have clear pedigree records. Individual performance records should be averaged over the same period.
3, Introduction should not be too indiscriminate: The introduction of parent breeding pigs in commercial pig farms should be based on the production needs and characteristics of the field, determine the introduction of varieties and quantities, select the introduction of breeding pig farms. The introduction field should be relatively fixed in l ~ 2 fields to avoid introduction everywhere. Although it was confirmed that there was no disease in the introduction field, the bacterial flora of various common diseases was of different types or subtypes. In other words, every time a field is introduced, it is possible to introduce bacteria that are common diseases that are not present in the field.
4, pay attention to the introduction of species age: breeding pigs about 4 months of age, weight 50 ~ 70 kg when introduced suitable. At the time of introduction, the breeding pigs are too young and too light for weight, and their growth and development will change greatly in the future. It is difficult to select accurately, resulting in high elimination rate; overweight, unfavorable transport and increased economic burden.
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