Effective measures for prevention and treatment of reproductive stress in sows

1. Symptoms:

⑴ showed abnormal bone metabolism, weak hooves, abnormal limb shape and gait. Soft feet, cracked hooves, bleeding under the hoof shell, severe postpartum paralysis.

⑵ sows showed reproductive disorders, especially first-born sows, with delayed estrus, anestrus or non-estrus. There are more babies in the first birth, less in two, or more in one and fewer in one. Sows have weak disease resistance, decreased immune function, incomplete involution of uterus, increased incidence of endometritis and mastitis, easy to cause various infections and higher elimination rate.

The fecundity of ⑶ sows and the survival rate of piglets decreased. The litter size of sows decreased, the weak fetus increased, the fetus size was uneven, the birth weight of piglets was small, the disease resistance was weak, the incidence of yellow and white dysentery of piglets was high, the lactation of lactating sows was insufficient, the development of piglets was slow and the weaning weight was small.

3. Prevention and treatment:

The diet of ⑴ reserve sows should be adjusted to promote the sexual maturity of sows from 6 months to 7 days after breeding. The weight of 6-month-old sows should be 80-90 kg. If the weight is not up to the standard, the feeding amount should be increased moderately.

During 70-114days after pregnancy, 70-80% of the birth weight and immune organs of the fetus are formed in ⑵ sows. The nutrients needed for the full development of the fetus should be ensured. 1-1.5% "Liusheng No. 1" should be added to the sow diet, and the feeding amount should be increased by 30-50%.

⑶ attaches importance to the feeding and management of lactation, ensuring the nutrients needed for lactation and uterine repair of sows, and adding 2% of "Liusheng No. 1" to the diet of sows. If sows give birth to more than 10 litters, they should feed freely.

The feed quality of ⑷ sows was kept unchanged during lactation from weaning to the 7th day after mating, but the feed quantity should be moderately reduced according to the fat condition of sows.