What are the aphrodisiac procedures for hollow sows in batch production?

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(2) the experienced breeding supervisor carefully observes, touches, stimulates and feels one by one behind the sows (for weaned empty pigs).

A. observe the expression of sows: dull expression

Changes of vulva: redness and swelling, mucus.

B, touching the vulva of sows: fever, dampness.

C, massage the vulva with your hands, press your back, ride a pig, and rub your breasts with your feet to stimulate.

D, feel the performance of sows in estrus: standing still and mucus.

7. Estrus procedure of weaned sows

1. 0-3 days after weaning: the boars will be driven into stimulation once in the morning and once in the afternoon.

2. 4-7 days after weaning: adjust to the limit fence to drive the boar around in front of the sow pen every day, artificial stimulation: pressing the back, massaging the vulva, breast.

3. 8-10 days after weaning: drive boars to walk around in front of sows every day. Artificial stimulation: pressing back, massaging vulva and breasts.

4. 11-13 days after weaning: adjusted to the limit pen of the empty pig area to drive the boar around in front of the sow pen every day, artificial stimulation: pressing the back, massaging the vulva, breast, at the same time: increasing (supplementary feeding) or reducing (hunger) feed. On the 11th day, D-chloroprostol sodium was injected intramuscularly.

5. 14-21 days after weaning: in the empty area, the limit bars are interspersed with each other to drive boars around in front of the sow pen every day, artificial stimulation: pressing the back, massaging the vulva, breasts, and at the same time: increasing (supplementary feeding) or reducing (hunger) feed. PG600 was injected intramuscularly on the 14th and 21st day.

6. 21-30 days after weaning: adjust to the big column to be eliminated and drive the boar to the big column to stimulate for 5-10 minutes every day. Artificial stimulation: pressing the back, massaging the vulva and breast, at the same time: increasing (supplementary feeding) or reducing (hungry) feed, replenishing green and succulent feed; go to outdoor sports and daylighting.

7. No estrus more than 30 days after weaning: eliminated.

Note:

1. The numbers required in 6 different stages are different.

2. After stage 2-5, other measures can be adopted at the same time except injection of D-chloroprostol sodium.

3. The figures of stage 6 are based on the normal days of estrus (5-7 days) and the estrous cycle (18-24 days) of sows after weaning.

8. The specific operation of the method of estrus in weaned sows.

1. The lure of boar patrol

Move the boar slowly in front of the pen and stay in front of each empty pen for 10-20 seconds, so that each sow and boar can get in touch with each boar.

2. Artificial stimulation

Massage the vulva with your hands, kneel on the hindquarters of the sow, press the hindquarters with your knees and press the back with both hands; ride on the back of the sow and gently rub the sow's breasts with your feet. In artificial stimulation, sows showed the best effect when moving back and forth, jumping and roaring.

Indicate the part that reacts to the stimulus during estrus.

3. Migrate / adjust columns

The backup pigs are tightly transferred to the positioning bar, which is conducive to oestrus checking and reminding; empty pigs are often exchanged with each other, and it is best to transfer the estrus sows to the side of the non-estrous sows, through the restlessness of the oestrus sows, biting the fence and biting the sows next to them to stimulate the next sow to estrus, and never forget the empty sows in the corner.

4. Rush into Dahan to stimulate

Each big column into 5-6 empty pigs, twice a day in the morning and afternoon to drive boars into estrus, each column to stimulate 5-10 minutes, boars through climbing, arching its abdomen, licking pubic parts to stimulate sows estrus, which can also stimulate boars to maintain exuberant libido. It is better to press the back of the sow while boosting the boar.

Oestrus can also be stimulated by increasing the amount of exercise of sows, mutual arching and biting frames of sows.

5. Change food intake

The fat sows are properly reduced, the lean ones are fed properly, and the green and succulent fodder is fed.

6. Outdoor sports and daylighting

In the morning or afternoon on a sunny day, the outdoor temperature is 18-28 degrees and direct sunlight is not suitable. Empty sows (more than 10) are rushed to outdoor sports. Sunlight stimulates sow hormone secretion to promote sow estrus. Mutual arching, biting and climbing between sows can stimulate sow estrus, sows in outdoor arching ground and eating some miscellaneous food can also stimulate sow estrus.

7. Drugs to promote estrus

Sodium D-chloroprostol can stimulate the degeneration and dissolution of persistent corpus luteum in sows and promote estrus in sows.

8. Keep the boar's libido

The boar with good sexual desire plays an important role in the aphrodisiac of the sow. The boar can maintain the exuberant libido through the stimulation of the sow, or stimulate the boar by having sex once a week.