There are three kinds of boar reproductive disorders in general: first, the loss of libido or loss; Second, there is sexual desire, but not across the breeding stock, can not be mated; Third, there is sexual desire, but abnormal sperm, no fertilization ability.
1 Loss or loss of libido, reluctance to approach or climb estrus sows
The reasons for this are mostly congenital genital dysplasia, abnormal hormone secretion, and malnutrition. Improper methods of adjustment and poor feeding conditions can also be caused.
Prevention: (1) should be carefully selected in the purchase of breeding pigs, testicular size or testicular dysplasia and other congenital reproductive organ abnormalities should be eliminated.
(2) Hormones with abnormal hormone secretion are mainly manifested as decreased male hormone secretion. During the treatment, while maintaining the health of the pig, available chorionic gonadotropin 80 mg, pregnant horse serum 100 mg, testosterone propionate 80 mg, three drugs are optional intramuscular injection.
(3) Science rearing. Nutrition is the material basis for maintaining boar life activities and producing semen. Boar feed should be mainly high protein, crude protein content of more than 14%. Vitamins (especially vitamin A, vitamin D, vitamin E) and minerals must be comprehensive. Can not use pig feed, because the fat pig feed may contain sedative, hypnotic drugs, long-term consumption of boars prone to cause central paralysis and unresponsive.
(4) pay attention to feeding and management. Young boars should be raised in a single lap to avoid cross-breeding, masturbation, premature ejaculation, and impotence. Stay away from sow pens and avoid stimuli caused by external factors. The barracks should be spacious, bright, airy, dry and hygienic. Summer heat season should pay attention to heatstroke cooling, winter to keep warm and cold.
(5) Scientific training. Plugging should be started at 7-8 months of age for formal breeding at 10 months of age. Early mating can shorten the breeding period of the breeding pigs and use smaller estrus sows than boars. If the sow is oversized, it will cause the initial breeding failure and affect boar libido. When training, the breeder must be careful, patient, and should not whiplash and other irritating actions.
(6) Exercise. Reserve boars should be given appropriate exercise, exercise each morning and evening, 1 hour each time. Guaranteed no less than 2 hours of exercise per day. Through exercise, you can exercise your limbs and shoes to ensure your body shape.
2 Have sex, but can't mate
The reasons for this are more common in boar penis, abnormal prepuce, inflammation, limb and hoof disorders, etc.
Prevention (1) When the penis and foreskin are inflamed and pain can't be mated, 4 million units of penicillin, 1 million units of streptomycin, and 10 ml of amniotic fluid are mixed and injected intramuscularly twice a day for 3 days. Or smear with fish ointment, erythromycin ointment.
(2) If the foreskin is too thick, too tight, or has adhesions, surgical treatment should be performed in time to remove the foreskin and divide the adhesions.
(3) If it is joint and muscle pain, the cause should be identified and symptomatic treatment should be provided. Due to rheumatism, 10 ml of sodium salicylate can be used intramuscularly for 1 week; or humans can be injected intramuscularly with 10 ml of Pacers injection. Due to injury caused by contusions, sprains, can be used below: natural copper, Zeeland, Angelica each 50 grams, wind, myrrh, frankincense, saffron, 25 grams each, 20 grams of Dragon's Blood, into powder, warm wine transfer service. If the ball joint is sprained, acupuncture will be made at the hole of the child's side, sprained at the hoof, acupuncture at Yongquan, Cunzi and Huanmen, and then wipe with warm wine.
3 sperm abnormalities and not sperm
Sperm abnormalities include oligozoospermia, oligospermia, spermatogenesis, and teratogens. One boar ejaculate semen volume is about 200-500 ml. There are about 800 million spermatozoa. After microscopy, the sperm count is less than 100 million.
The causes of sperm abnormalities are more common in the sequelae of heat diseases such as JE, erysipelas, pulmonary epidemics, and heat stroke. If fever takes a long time, it can cause testicular enlargement and sperm inactivation.
Prevention: The treatment of fever rickets should be treated with antibiotics combined with antipyretic drugs such as aminopyrine and bupleurum. Can also be used cold water, ice and other cold scrotum.
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