Analysis of reasons for the low vigor of boar sperm
There are many causes of low sperm viability. To sum up, there are mainly the following categories:
1. Infectious Diseases: Chronic or acute diseases such as JE, swine fever, and blue ear infections in boars will result in low sperm motility.
2. Overweight or overweight, lack of exercise, etc. will cause boar sperm motility.
3. Immune factors: immunosuppression, or injection of vaccine stress.
4. Endocrine factors: Endocrine disorders or disorders.
5. High temperature effects, heat stress.
6. Chromosome abnormalities.
7. Testicular development is not normal.
8. Other factors:
(1) Zn, Cu, and Mg in seminal plasma are related to semen quality. Zinc in seminal plasma is more than 100 times that in plasma. Zinc, iron, and magnesium in seminal plasma of patients with low sperm motility are significantly lower than Normal healthy boar. Zinc can delay the lipid oxidation of the cell membrane, maintain the stability and permeability of the cell structure, and thus ensure good sperm motility. When the content of trace element cadmium (Cd) is high, the activity of sperm can be reduced. Cadmium can directly inhibit the oxidative enzymes of sperm and directly inhibit the movement organs of sperm. The content of cadmium in the semen of infertile boar is significantly higher than that of normal boar.
(2) Spermatozoa-related enzyme deficiency or reduced enzyme activity, vitamin deficiency, high temperature stress, drug effects, and exposure to chemical toxicants can all cause decreased sperm motility.
(3) Fungal factors and drug factors Mycotoxins, such as mycotoxins, affect sperm motility through direct and indirect damage to sperm. Long-term use of antibiotics can directly and indirectly influence sperm motility and affect sperm motility.
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