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It is not better to introduce breeding pigs
The introduction of improved varieties is the primary factor in raising the efficiency of raising pigs. Many small-scale pig farmers, especially those who have just entered the pig industry, are eager to introduce large-scale pigs. The greater the weight of imported pigs, the greater the production performance. The better. In fact, the introduction of overweight boars can easily bring hidden problems for future production. The reasons are as follows: 1. Most of the boars with large boars are selected by the customers during the long-term sales of pig farms. It is also very likely to have defects in reproduction or production performance. In the future, if the quality of the breeding pigs purchased is found to be poor, the growth rate of the breeding offspring is slow, the feed conversion rate is low, and the slaughter time is often longer than one year, resulting in heavy losses. Second, gilts with a body weight of more than 60 kilograms need a large amount of nutrients to promote the development of reproductive organs. Therefore, it is necessary to replace their diets with gilts in time, but there are many kinds of pig breeders in actual production. Replace the gilt feed with a relatively inexpensive finishing pig feed. It is well known that there are many growth-promoting agents added to finishing pigs. These growth-promoting agents usually impair the development of the reproductive system, reduce the gilts' estrus rate and the rate of mating conception, and cause losses in subsequent production. Third, in order not to affect the estrus breeders, breeding households usually use limited feeding methods to prevent breeding pigs. Obese pigs are obviously more fat, poor planting conditions, adverse for future production. 4. The introduced breeding pigs should have sufficient time for immunization and deworming before use to ensure safe breeding. The appropriate body weight for immunization and deworming of breeding pigs is 50-70 kg. The breeding pigs that have missed this optimal period and are overweight are bound to leave hidden dangers for safe and efficient rearing.