What are the causes of the unqualified breeder's semen?
Semen quality is an important index of breeder's fertility. For modern pig production, the poor quality of semen semen is a frequent problem. When the semen quality is poor, the sow is often caused by the inability of the sow to conceive. The sows returned to their love after mating; when artificial insemination, semen quality was poor and semen could not be used and discarded. If you do not perform a thorough check on the quality of your semen, you can use it for insemination, which can also lead to a large number of sows returning. Dole Pig Fairy combines the field of artificial insemination in 11 years of professional pigs and shares it with the technicians of boars or swine artificial insemination centers. How to reasonably judge boar semen quality and analyze why semen is unqualified:
The problem of unqualified index of breeding pig sperm
1. Insufficient ejaculation
When sows are paired, total semen volume, sperm density, and sperm motility entering the reproductive tract jointly determine the total number of spermatozoa that enter the genital tract. Therefore, the lack of ejaculation, to a large extent determines the total number of effective sperm. Under normal circumstances, the amount of ejaculation of the breeding pigs is insufficient, which is mostly caused by the decline of the breeding ability of the breeding pigs. Therefore, there is a considerable correlation with other indicators of semen. The amount of seminal fluid also represents the level of sexual function of the breeding pig to some extent.
2. The normal amount of ejaculation
Under normal circumstances, the amount of ejaculation in breeding pigs should be guaranteed to be between 180-250 ml, and the total amount of semen for a single breeding pig can even reach 600 ml. The amount of ejaculation in breeding pigs is affected not only by individual differences, species, age, physique, but also by season, management style, and microclimate control. From the standpoint of individual differences, the length of the long axis of the testes and the size of the scrotal circumference (ie, testicular volume) of the breeding pig largely represent the size of a boar's ability to produce sperm. The method for determining the amount of ejaculated pigs is to manually collect the boar semen and determine the volume or weight. Under the condition of artificial insemination, semen collected from breeding pigs should not collect clear semen-free semen as much as possible. However, to measure the amount of ejaculation in a breeder pig, collect all the semen from the male breeder except for the jelly and measure it.
3. Causes of insufficient ejaculation
It is difficult to establish a uniform limit for the lack of ejaculation in breeding pigs because of the differences in breeds, physical differences, and testicular size. For modern lean-type pigs, under normal breeding frequency, adult pigs collect all the semen of each ejaculate after several times of semen collection. If the average ejaculation of a boar is less than 100 ml, it should be considered The amount of ejaculation in this breeding pig is insufficient.
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