Too rough to grow pigs as fattening pigs, feed fattening pigs, and feed freely. This feeding method leads to poor growth of the boar due to poor feed quality, thin semen, high deformity rate of the sperm, poor fertility rate of the sows after breeding, and some boar due to high content of crude fiber in the feed. Excessive volume leads to severe drooping of the abdomen, which makes it difficult to communicate with the penis, affecting the breeding effect, and shortening the period of use. The sows are poorly fed due to extensive feeding, the estrus performance is not obvious, ovulation is low, and the number of children born after conception is small. Dysplasia, prone to multiple diseases.
The breeding pigs are too fine to be kept as pigs, regardless of the actual needs of the breeding pigs and the specific usage, blindly increasing the nutrient content, and excessively feeding various fine feeds. This feeding method will lead to overweight obese pigs, excessive body fat deposits in the body, so that decreased libido, greatly reduced the ability to climb, seriously affecting the use rate, too obese also affect the quality of semen, resulting in more abnormal sperm, die The proportion of sperm is higher, and the sow’s fertility rate after mating is not high. Empty sows’ lyophilia may lead to no obvious estrus performance. It is not easy to grasp suitable breeding opportunities. Many; if the pregnant sow has a good sensation, the body fat will oppress the fetus and lead to fetal death or thin body of the production of the pig, affecting the fertility rate of the pig, the sow often does not appear after estrus or estrus Pregnancy and other phenomena.
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