An empty sow refers to a gilt that has not been bred to a breeding age, or to a lactating sow after weaning until estrus, including weaned sows, aborted sows, returning sows, and long-term non-estrus sows. . Efficient breeding of empty sows in pig production to allow normal estrus and multiple rows of robust eggs, increasing the mating rate and conception rate after mating, so that each sow is productive piglets a year is to improve pig economy One of the keys to benefit.
Rational breeding of empty sows
Moderate body size To prevent empty sows from being over-fat, the energy level in the diet should not be too high. The per kilogram of formulated feed contains 11.715 MJ of digestible energy, and the crude protein level is 12% to 13%. If the feed contains energy High, appropriate amount of hay powder or green feed should be added to reduce the energy concentration in the feed and prevent the sows from becoming over-fat. For the leaner sows, they may begin 10 to 14 days before mating, and the gilts may start 7 to 10 days before mating. The feeding time is generally about 7 days. During the excellent feeding period, each sow will increase the feeding amount by about 1.5 kg per day, for example, 1.4 to 1.8 kg/day, and during this time, it may be fed by 2.9 to 3.3 kg/day. Increasing the amount of feed has a significant effect on stimulating endocrine and improving reproductive performance. It should be noted that short-term superior feeding does not increase dietary protein levels but increases total energy in the diet.
The rational feeding of empty sows uses wet mix, quantitative feeding methods, feeding 2 to 3 times a day. The sows of 90-120 kg body weight are fed 1.5-1.7 kg per day, the sows of 120-150 kg body weight are fed 1.7-1.9 kg per day, the sows of 150 kg or more are fed 2.0-2.2 kg per day, and the sows of medium lyrical level are daily sows. Feeding 2.5 kilograms, followed by moderate lyrical feed intake. For sows that are extremely emaciated and not estrus after they have been weaned, the feed should be quantified, allowing it to recover quickly, and be able to estrus early and receive mating.
Increase the content of vitamins and trace elements in feeds Vitamins play an important role in the reproductive performance of sows. Increasing the amount of green feed (5 to 10 kilograms per head per day) to empty sows can increase the estrus of sows. Because, green feed contains not only a variety of vitamins, but also contains some substances with aphrodisiac similar to estrogen. In addition, reasonable supplements of calcium, phosphorus, and other trace elements can greatly help the sows’ estrus, ovulation, and abortion. In general, 0.7% of calcium and 0.5% of phosphorus per kilogram of compound feed can meet the demand.
Promotes ovulation in sows with estrus and improves conception rate
The typical performance of grasping the estrus of the sow 1 The genital area begins to fade from the appearance of redness and swelling and shrinkage, while secreting thick and thin vaginal mucus. 2 The spirit appears to be weak and strong, moving back and forth, trying to jump to find a spouse. 3 Loss of appetite, not even eating. 4 Climb other sows from the beginning, but not other sows, to be able to accept the other sow's climb. 5 Pressing on the back does not evade. It is generally believed that the sow has a phenomenon of “standing reflection†and is suitable for the first match. It is assigned once every 8 to 10 hours. This can result in a higher conception rate and a higher number of births. many.
Promote ovulation in sows so that sows achieve high yields of multiple births or promote normal estrus and ovulation in estrus-inoperated sows and infertile gilts. According to the situation, the following measures may be taken: (1) Boar induction method: often used in trials The boar goes for a non-estrus empty sow, which produces a nerve reflex through the exogenous hormone odor and contact stimuli secreted by the boar, which causes the pituitary gland to secrete follicle stimulating hormone and promotes ovulation. (2) Grouping and merging: bringing non-estrus empty sows into the shed where the estrus is found, and stimulating ovulation in estrus by soaring. Strengthen exercise: Place the non-estrus empty sow in a larger enclosure to allow it to move freely, receive sunlight, return to nature, promote metabolism, improve sensation, and promote ovulation. (3) Hormonal aphrodisiac: The injection of chorionic gonadotropin 100 international units or pregnant horse serum per 10 kilograms of body weight to an estrus-free sow with an intramuscular injection of 800 to 1000 IU per stimulator has the effect of promoting ovulation in sows.
2. In the usual form and method of ingestion.
3. Marked with a label biological adjustment functions.
Rational breeding of empty sows
Moderate body size To prevent empty sows from being over-fat, the energy level in the diet should not be too high. The per kilogram of formulated feed contains 11.715 MJ of digestible energy, and the crude protein level is 12% to 13%. If the feed contains energy High, appropriate amount of hay powder or green feed should be added to reduce the energy concentration in the feed and prevent the sows from becoming over-fat. For the leaner sows, they may begin 10 to 14 days before mating, and the gilts may start 7 to 10 days before mating. The feeding time is generally about 7 days. During the excellent feeding period, each sow will increase the feeding amount by about 1.5 kg per day, for example, 1.4 to 1.8 kg/day, and during this time, it may be fed by 2.9 to 3.3 kg/day. Increasing the amount of feed has a significant effect on stimulating endocrine and improving reproductive performance. It should be noted that short-term superior feeding does not increase dietary protein levels but increases total energy in the diet.
The rational feeding of empty sows uses wet mix, quantitative feeding methods, feeding 2 to 3 times a day. The sows of 90-120 kg body weight are fed 1.5-1.7 kg per day, the sows of 120-150 kg body weight are fed 1.7-1.9 kg per day, the sows of 150 kg or more are fed 2.0-2.2 kg per day, and the sows of medium lyrical level are daily sows. Feeding 2.5 kilograms, followed by moderate lyrical feed intake. For sows that are extremely emaciated and not estrus after they have been weaned, the feed should be quantified, allowing it to recover quickly, and be able to estrus early and receive mating.
Increase the content of vitamins and trace elements in feeds Vitamins play an important role in the reproductive performance of sows. Increasing the amount of green feed (5 to 10 kilograms per head per day) to empty sows can increase the estrus of sows. Because, green feed contains not only a variety of vitamins, but also contains some substances with aphrodisiac similar to estrogen. In addition, reasonable supplements of calcium, phosphorus, and other trace elements can greatly help the sows’ estrus, ovulation, and abortion. In general, 0.7% of calcium and 0.5% of phosphorus per kilogram of compound feed can meet the demand.
Promotes ovulation in sows with estrus and improves conception rate
The typical performance of grasping the estrus of the sow 1 The genital area begins to fade from the appearance of redness and swelling and shrinkage, while secreting thick and thin vaginal mucus. 2 The spirit appears to be weak and strong, moving back and forth, trying to jump to find a spouse. 3 Loss of appetite, not even eating. 4 Climb other sows from the beginning, but not other sows, to be able to accept the other sow's climb. 5 Pressing on the back does not evade. It is generally believed that the sow has a phenomenon of “standing reflection†and is suitable for the first match. It is assigned once every 8 to 10 hours. This can result in a higher conception rate and a higher number of births. many.
Promote ovulation in sows so that sows achieve high yields of multiple births or promote normal estrus and ovulation in estrus-inoperated sows and infertile gilts. According to the situation, the following measures may be taken: (1) Boar induction method: often used in trials The boar goes for a non-estrus empty sow, which produces a nerve reflex through the exogenous hormone odor and contact stimuli secreted by the boar, which causes the pituitary gland to secrete follicle stimulating hormone and promotes ovulation. (2) Grouping and merging: bringing non-estrus empty sows into the shed where the estrus is found, and stimulating ovulation in estrus by soaring. Strengthen exercise: Place the non-estrus empty sow in a larger enclosure to allow it to move freely, receive sunlight, return to nature, promote metabolism, improve sensation, and promote ovulation. (3) Hormonal aphrodisiac: The injection of chorionic gonadotropin 100 international units or pregnant horse serum per 10 kilograms of body weight to an estrus-free sow with an intramuscular injection of 800 to 1000 IU per stimulator has the effect of promoting ovulation in sows.
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2. In the usual form and method of ingestion.
3. Marked with a label biological adjustment functions.
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