The gilt rearing management mainly pays attention to the following aspects:
1. Control of sensation and boar induction. The gilts should be allowed to develop fully before 60 kg, and 60 kg should be properly restrained to prevent over-fertilization in the first half of breeding. Feed about two kilograms per day and feed twice a day. Swine stocks can be used for growing pigs.
When a gilt grows to 160 days of age, it is best to put the sow on the adult boar for 35 minutes every day. The pheromone secreted by the adult mandible glands of the boar contributes to the induction of estrus in the gilt.
2. Short-term excellent feeding
Fourteen days before gilt breeding, breeding can be strengthened and free-feeding can be conducted so that the sows can have about 2.5 eggs in a row. This will undoubtedly have an important effect on raising the number of litters in the primiparous sows.
3. The number of ovulation of the maternal gilts at least when the sow is estrus at least is related to the number of affective periods. The number of litters is low due to the low number of ovulation during mating at the time of first love. Because the number of gilts in the entire group accounts for about 30% of the total number of gilts, their litter size has a direct impact on the entire population. The important purpose of the boar in inducing its early estrus is also to make it more emotional before the breeding. Some pig farms have no record of the number of love days for the gilts that are being bred. This is undoubtedly an incorrect method of operation.
4. Single compound and double match.
The best time for breeding should be 10-26 hours after estrus sows are allowed to cross. The single match means that only the boars are mated once in the estrus of the sow. Although this can reduce the number of breeding boars, it is difficult to control the timing of the most suitable sows, so a single arrangement may reduce the conception rate and reduce the number of litters. The compounding refers to using the same boar for two times in one estrus, with an interval of 8-12 hours. In production practice, different boars of the same breed are also used twice at regular intervals. This method can make sperm often present in the reproductive tract of the sow to increase the chance of egg fertilization, thereby increasing the number of litters of sows. Double mating refers to the use of two boars of the same species or different breeds in the same period of time (10-15 minutes) with the same sow in one estrus. This method can promote accelerated egg maturation, shorten the ovulation time, increase the number of ovulation. However, due to the short interval between the two breedings, this method often has the disadvantage of similarity to single matching.
For the best time for mating, there are four sayings for reference: vulva dung grass, insemination is good; look daze, insemination, abortion; standing still, just breeding; mucus thickens, it is the heat.
1. Control of sensation and boar induction. The gilts should be allowed to develop fully before 60 kg, and 60 kg should be properly restrained to prevent over-fertilization in the first half of breeding. Feed about two kilograms per day and feed twice a day. Swine stocks can be used for growing pigs.
When a gilt grows to 160 days of age, it is best to put the sow on the adult boar for 35 minutes every day. The pheromone secreted by the adult mandible glands of the boar contributes to the induction of estrus in the gilt.
2. Short-term excellent feeding
Fourteen days before gilt breeding, breeding can be strengthened and free-feeding can be conducted so that the sows can have about 2.5 eggs in a row. This will undoubtedly have an important effect on raising the number of litters in the primiparous sows.
3. The number of ovulation of the maternal gilts at least when the sow is estrus at least is related to the number of affective periods. The number of litters is low due to the low number of ovulation during mating at the time of first love. Because the number of gilts in the entire group accounts for about 30% of the total number of gilts, their litter size has a direct impact on the entire population. The important purpose of the boar in inducing its early estrus is also to make it more emotional before the breeding. Some pig farms have no record of the number of love days for the gilts that are being bred. This is undoubtedly an incorrect method of operation.
4. Single compound and double match.
The best time for breeding should be 10-26 hours after estrus sows are allowed to cross. The single match means that only the boars are mated once in the estrus of the sow. Although this can reduce the number of breeding boars, it is difficult to control the timing of the most suitable sows, so a single arrangement may reduce the conception rate and reduce the number of litters. The compounding refers to using the same boar for two times in one estrus, with an interval of 8-12 hours. In production practice, different boars of the same breed are also used twice at regular intervals. This method can make sperm often present in the reproductive tract of the sow to increase the chance of egg fertilization, thereby increasing the number of litters of sows. Double mating refers to the use of two boars of the same species or different breeds in the same period of time (10-15 minutes) with the same sow in one estrus. This method can promote accelerated egg maturation, shorten the ovulation time, increase the number of ovulation. However, due to the short interval between the two breedings, this method often has the disadvantage of similarity to single matching.
For the best time for mating, there are four sayings for reference: vulva dung grass, insemination is good; look daze, insemination, abortion; standing still, just breeding; mucus thickens, it is the heat.
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