Research shows that in very bright, 16-hour-per-day (8-hour dark) environments, piglet weaning is significantly more important than low light, because high light results in both the frequency of suckling and the amount of lactation in the sow. There is improvement.
In addition, studies conducted in dry sows and lactating sows showed short light (250 lux, 8 hours of light per day, 16 hours compared to the case of long light (250 lux, 16 hours of light per day, 8 hours of darkness). In the case of hourly darkness, the level of cortisol in the sow is higher, and cortisol can measure stress levels.
However, free-range sows look for dark areas during nesting to build nests and deliveries. Therefore, it may be necessary to consider increasing the intensity and duration of light after all sows have been delivered in the delivery room. Studies have shown that increased light intensity and time after delivery can promote piglet suckling and sow lactation, thereby increasing weaning weight.
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