Three-stage production process for large-scale pig farms

The swine breeding process in large-scale pig farms in Beijing has used the four-stage pig raising process since the 1980s: the sow's empty and pregnant stage, and the sow's calving stage. The four stages of weaning piglet cultivation stage and breeding and fattening are convenient for production management, and also have different purpose for pig production according to different stages, and create certain conditions to raise the pig production level, and pig raising for more than 20 years. Practice has played an important role.
With the continuous development of all aspects of pig production, the pig production process has also achieved new development. With the main goal of all-in and out-control epidemics, early (ultra-early) weaning stage isolation and rearing techniques have been implemented in some pig farms, but most of the large-scale pig farms cannot achieve this new process because of the conditions.

1 Three-stage process implementation and effectiveness

After many years of experience in feeding and management, my field has been under the guidance of experts from the Institute of Animal Husbandry of the Chinese Academy of Agricultural Sciences. Took the lead in the implementation of a three-stage pig raising process in China. That is to say, the original “carcassing” and “conservation” stages are combined into one, that is, the piglets are rotated 90 degrees after the weaning (cage production can be active), and the mothers are left behind. Nursery pigs were kept on the bed (60-70 days) in their original circling (all-in and all-out structure unchanged). Weaned piglets from individual litters after weaning can be kept in one or two feeding beds and fed separately.

The characteristics of this process are more than the four-stage pig-raising process, which increases the number of depots in the delivery bed, that is, all the nursery-beds are built as birthbeds, but this investment is one-time. In addition, feeding piglets in one place for too long (60-70 days) is not conducive to the control of the disease. However, after my field practice over the past five years, this process has improved the pig production index in the actual production compared with the four-stage process. See the following table:

70-day survival rate
70-day group weight (kg)

Four-phase process
90%
25 4.3

Three-phase process
93%
29 5.2

(This data is the comparison data before and after the field process improvement)

2 Advantages of the three-stage process

2.1, reduce weaning environmental stress

When the piglet is switched to a new environment at weaning and the piglet transitions from lactating to feed intake, the two stresses are detrimental to the growth of the first week of the piglet, and poorly managed pig farms show zero or negative growth during this period. The process reduces the stress of changing the environment.

2.2, reduce the intensity of weaning labor

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