Sows breeding technology program

Breeding goal: timely breeding, increase the sow fertility rate of sows and increase the number of sows born. The key technology: sow estrus identification and breeding time. Sow estrus symptoms: reduced feed intake, unsatisfactory performance; vulva infiltrates, with mucus outflow; crawling across other pigs; pressing on the back, standing still, ears upright (pressure back, estrus identification mark); Climbing (heating identification mark); Acceptance of climbing time is generally 36-48 hours. Estrus appraisal: Try a boar twice a day, 9:00 am and 4:00 pm. Check if the sow receives boar or pressure backs. Breeding time: gilts. The first match, the third estrus cycle, weighing more than 105 kg, the age of 225 days or more. Sows are produced. 3-10 days after weaning. According to the selection plan, the boars were selected and found to be able to be bred for the first time when they received the climb or push back, and the second time the same time the next day. Not estrus sow treatment: timely adjustment or polyculture with other sows; use of boar stimulation; hormone treatment (intramuscular pmsg1000iu); observation of the three estrus cycles (63 days) is still not estrus, then eliminated. Measures to delay postpartum estrus and low litter size in a producing sow: Short-term high-quality feeding after weaning; intramuscular injection of pmsg1000iu at weaning.

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