To control the birth weight of a litter of sows, one litter should be controlled at 3.2 kilograms per day at the end of pregnancy, with a maximum of 3.4 kilograms. To increase the feed nutrition of a sow during lactation and add soya bean powder at a rate of 3% to 4% of the daily feed intake. The peak feed amount should be no less than 6.0 kg per day, and be maintained for more than 10 days to reduce the occurrence of stinking. .
A pregnant sow is treated with microecological preparations to regulate the gastrointestinal tract two weeks before birth, and the use of green materials can be increased before labor. Minimize the number of artificial births of a sow, reduce uterine inflammation, if there is a midwifery, a bottle of metronidazole can be suspended in the delivery process, postpartum tracking care in place.
Controlling the number of litters of a single lactating sow, the number of litters within 10 days after delivery is 11 and the number of litters after 10 days is not less than 10. There is no control over the material before weaning. Weaning pigs of a single child are placed in groups, or placed in the positioning column for tapping, to ensure sufficient amount of tapping, and delaying the occurrence of estrus or estrus abnormalities requires a love period to be allocated. Strengthen the optimization efforts to resolutely eliminate one-week-weaned pigs that do not meet the requirements for species use, and resolutely not meet the performance of static reflexes, so as to improve the status of estrus in a single weaned pig.
Grasp the initial age and weight of the gilts, and strictly implement the standards for reserve pigs. The appropriate initial age and weight of the gilts vary according to breed and feeding management conditions, among which the opening is not less than 8 months old. Weight not less than 140 kg, with excellent body size and sensation. In general, local breeds can be planted between 6 and 8 months of age and 50 to 60 kilograms after birth, and cultivars should be bred and used starting from 9 to 10 months of age and weighing 100 to 120 kilograms. All spare organs and organs of spare pigs are still far from perfect, such as premature mating, not only affect the reproductive performance of the first child, but also affect the growth and development of the pig itself, thereby affecting the reproductive performance of the subsequent fetuses, and the shorter service life. If the breeding is too late and the weight is too large, it will increase the probability that the gilts will develop obesity and obstructed labor, and at the same time increase the gilt breeding costs.
If the gilt's feeding and management conditions are poor, it is advisable to postpone the initial matching age, although the age of the primordial primordial primordium is smaller and the weight is smaller. If the feeding and management conditions are good, although the weight reaches the initial weight requirement and the age of the month is still small, it is best to control the weight by adjusting the nutrition level of the diet and the amount of feeding, and to perform the mating until the age meets the requirement. Ideally, both the age and weight meet the requirements for the initial deployment.
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