Simultaneous estrus in the sow is conducive to better management of the herd, better batch production, smoother production, and thus achieve factory farming. So, how do you let the sows estrus at the same time? Today, Hui Nongwang Xiaobian will talk to you about the pig raising technology that allows the sow to estrus at the same time.
First, the reproductive performance of sows is best in January-May, because the weather is cool and better to eat.
Due to the weather, its reproductive performance is lowest in July-September. Transferring a sow from a farrowing house to a breeding house produces positive stress. Most sows will estrus at the same time.
Sow estrus reason
1. Drastic changes in daily life; 2. termination of breast-feeding period; 3. movement; 4. boar stimulation; 5. stress
Second, if the sow has problems with the estrus, you can concentrate the sows together for 1-2 hours after weaning and before going to the breeding house.
Reasons : 1. The level problem will cause more stress; 2. Find the leading sow; 3. Stop breastfeeding. Even if the first two steps are correct, there will still be some sows unable to estrus with other sows.
Practice : These sows are adjusted on the day of weaning on another group of sows for new field stimulation, and new boars may be more attractive than their pigs.
The mucosa returned to normal during lactation and the sow hormone secretion returned to normal.
At the same time, the daily feed intake increased and the milk production increased until it stabilized three weeks after delivery. Stable milk production and increased feed intake can cause sows to approach or exceed prenatal conditions when breastfeeding is extended.
More than 30 days of lactation, some sows start to estrus even before weaning
Therefore, prolonging lactation can improve reproductive performance for most sows. Poor body condition during weaning is usually caused by a large loss of physical energy during breastfeeding, so the body energy is in a negative energy balance during weaning. Therefore, poor body condition after weaning can lead to poor reproductive performance.
Prolonged breastfeeding increases the risk of sow entering estrus before weaning
This can cause a lot of trouble in controlling the number of sows in the delivery room and breeding the sows. If the sow is in estrus, it is more beneficial to breed it. The litter size will be less than the normal breeding in the next estrus, but the number of non-production days will be reduced to compensate for the loss. The bigger problem is that the sows that are already in estrus in the birthing house will not estrus within 4-5 days after weaning, but will not estrus 21 days after the estrus in the delivery room.
If the estrus control is mechanical, that is, 5 days after the sow is weaned, they will return after 18-23 days after the estrus in the delivery room.
The above is the technology of how to make the sows estrus at the same time. In fact, it is necessary to understand the sow's physiological estrus time and also to manage the sows in order to ensure the mother. The pigs estrus at the same time.
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