The sexual maturity of Rex rabbits is generally 4-6 months old, and the female rabbit is slightly earlier. The suitable breeding time is 8-9 months old. The breeding time cannot be too early; otherwise, it will not only affect the quality of the pups but also affect the growth and development of the rabbits.
The technical points of breeding are now described as follows:
Scientifically determine initial age
Determine the initial age of meat rabbits, mainly based on body weight and the age of the moon to decide, under normal feeding and management conditions, when the male and female rabbits reach 70% of the standard weight of the species, they have reached body maturity and can start breeding. Generally small breeds have an initial age of 4-5 months and a weight of 2.5-3 kilograms; medium breeds are 5-6 months old and weigh 3.5-4 kilograms; large breeds are 7-8 months old and weigh 4.5-6 kilograms.
Because the sexual age of male rabbits is later than that of female rabbits, the initial age of male rabbits should be about one month later than that of female rabbits. In order to prevent early mating and inbreeding, the male and female should be kept separately before sexual maturity.
Scientifically determine the age of use to eliminate and update rabbit populations in due course
The service life of male and female rabbits is generally 3 to 4 years. If the physique is robust and the use is reasonable, the breeding period can be appropriately extended. However, if they are too old, their fertility rate, litter size and survival rate are all poor, and the quality of the litter-bearing rabbits is also poor. Therefore, it is necessary to eliminate and update the rabbit population in due course. Generally, it will be eliminated 1/3 each year and it will be changed every three years, so that rabbits of appropriate age will have an absolute advantage in the rabbit population.
Scientific arrangements for breeding season
Mastering the mating season of meat rabbits is an important part of raising the survival rate of puppies. Although there is no obvious seasonality in breeding rabbits, breeding can be done throughout the year, but due to different seasons such as temperature, light, and nutritional status, The female rabbit's conception rate and the survival rate of pups have a certain influence.
Spring and autumn
The climate is mild, dry, rabbit libido is flourishing, the female rabbit has a high conception rate, the number of litters is high, and the survival rate of the pups is high. It is the best season for meat rabbits to breed and reproduce. A lot of rabbit farms in spring are using frequency spawning method (blood allocation), and even after producing 2-3 tires, they will be adjusted again to restore their physical strength.
summer
Where the Shewwin temperature is above 30°C, breeding should be stopped. Generally, breeding is stopped during June to mid-July each year. However, if the female rabbit is physically strong and has heat-treating conditions, breeding can be properly arranged.
winter
In winter, the temperature is relatively low, and the breeder's physique is relatively weak, and the conception rate is low. If there is no insulation equipment for the pups born, it is likely to freeze or freeze. Therefore, to be winter-producing, nutrient-rich feed must be provided to maintain a healthy constitution; there must also be insulation measures, generally requiring that the room temperature be not lower than 15°C, the nest of rabbits should not be lower than 30°C, and the young rabbits should require 20°C. surroundings.
Timely breeding
Determination of mating time of natural mating
(1) Determine breeding time based on female estrus performance. The estrus cycle of meat female rabbits varies greatly, usually in 8-15 days, and the estrus period is generally about 3 days. The estrus manifests itself in uncomfortable behavior and loss of appetite. It is often preceded by paralyzed cases or hindlimbs. Sometimes it has nesting phenomenon. The genital area is wet and swollen. The entire estrus period is divided into the early, middle, and late periods. The judgments are mainly based on the changes in the pudendal area: the early stage of estrus becomes more humid, slightly swollen, and pink; the middle stage is moist, swollen, showing a large red (commonly known as old red); and the latter is moist. , swollen, purple black. The best breeding time is in the middle and late stages of heat.
(2) The test method determines the mating period. Put the female rabbit in the male rabbit's box. When the male rabbit chases after climbing, if the female rabbit accepts the mating posture, it means that the female rabbit has estrus, and the breeding can be performed. Otherwise, they are not in heat and cannot mate.
(3) blood allocation. That is, the female rabbits are mated after 1-2 days after farrowing.
Determination of artificial insemination breeding time
Female rabbits are stimulating ovulatory animals and do not ovulate automatically without mating or drug stimulation. Therefore, ovulation stimulation is required before artificial insemination. Usually take injection of reproductive hormones to stimulate ovulation, the highest infertility rate within 2-8 hours after ovulation stimulation. In order to increase the conception rate, stimulation of ovulation should be carried out during the estrus.
Choose the right breeding time on the day of breeding
The spring and autumn seasons are best arranged from 8 to 10 am. The summer season uses the early morning and late evening when it is cooler, and the winter season takes place at the relatively warm noon. In addition, 1 hour before and after feeding should not be suitable for breeding.
Master the breeding program correctly
Checking male rabbits to create a suitable environment
Prior to mating, male rabbits should be examined. All male rabbits who are frail, poorly developed, diseased, and related have no ability to mate. Where conditions permit, semen quality checks should also be performed on male rabbits. After the male rabbit was identified, all the utensils in the male rabbit cage were removed and a large wooden board was placed on the bottom of the cage to prevent the rabbit claws from being caught in the cage slits.
Place the female rabbit in a male rabbit cage for breeding
The female rabbits with good estrus, good health, and appropriate breeding were gently placed in male rabbit cages for breeding. The male rabbits cannot be placed in the female rabbit cage for breeding. If the male rabbit is placed in the female rabbit cage, the male rabbit can easily affect the sexual desire activity due to the change of the environment, and even does not climb across the female rabbit, resulting in failure of the breeding.
Post-processing
Immediately after mating, immediately pat on the buttocks of the female rabbit. After the female rabbit has a tight body, the semen can be deeply inhaled, which facilitates the movement of the sperm from the vagina to the uterus and prevents the semen from flowing back. After that, the female rabbit was removed from the rabbit cage and checked for spuriousness in the vulva, and the female rabbit was sent back to the original cage for timely registration.
Compounding
In order to ensure that the female rabbits become pregnant and prevent false pregnancy, they must be reconstituted. There are two methods for compounding. (1) Repeated breeding. The same male rabbits were reconstituted 6-8 hours after the first breeding. According to experiments, the rate of conception of repeat breeding can reach 95-100%. (2) Double breeding. About 10 minutes after the first breeding, another male rabbit is used for the second mating. According to the experiment, the rate of adopting double-breeding can be increased by 25-30% compared with that of single-breeding. This method is only suitable for the production of commercial rabbits because it is impossible to judge the ancestry of the ancestry.
Do a good pregnancy test
Timely judge whether the female rabbit is pregnant. If it is not pregnant, it should be supplemented in time. Can use external observation method and touch tire method inspection.
The technical points of breeding are now described as follows:
Scientifically determine initial age
Determine the initial age of meat rabbits, mainly based on body weight and the age of the moon to decide, under normal feeding and management conditions, when the male and female rabbits reach 70% of the standard weight of the species, they have reached body maturity and can start breeding. Generally small breeds have an initial age of 4-5 months and a weight of 2.5-3 kilograms; medium breeds are 5-6 months old and weigh 3.5-4 kilograms; large breeds are 7-8 months old and weigh 4.5-6 kilograms.
Because the sexual age of male rabbits is later than that of female rabbits, the initial age of male rabbits should be about one month later than that of female rabbits. In order to prevent early mating and inbreeding, the male and female should be kept separately before sexual maturity.
Scientifically determine the age of use to eliminate and update rabbit populations in due course
The service life of male and female rabbits is generally 3 to 4 years. If the physique is robust and the use is reasonable, the breeding period can be appropriately extended. However, if they are too old, their fertility rate, litter size and survival rate are all poor, and the quality of the litter-bearing rabbits is also poor. Therefore, it is necessary to eliminate and update the rabbit population in due course. Generally, it will be eliminated 1/3 each year and it will be changed every three years, so that rabbits of appropriate age will have an absolute advantage in the rabbit population.
Scientific arrangements for breeding season
Mastering the mating season of meat rabbits is an important part of raising the survival rate of puppies. Although there is no obvious seasonality in breeding rabbits, breeding can be done throughout the year, but due to different seasons such as temperature, light, and nutritional status, The female rabbit's conception rate and the survival rate of pups have a certain influence.
Spring and autumn
The climate is mild, dry, rabbit libido is flourishing, the female rabbit has a high conception rate, the number of litters is high, and the survival rate of the pups is high. It is the best season for meat rabbits to breed and reproduce. A lot of rabbit farms in spring are using frequency spawning method (blood allocation), and even after producing 2-3 tires, they will be adjusted again to restore their physical strength.
summer
Where the Shewwin temperature is above 30°C, breeding should be stopped. Generally, breeding is stopped during June to mid-July each year. However, if the female rabbit is physically strong and has heat-treating conditions, breeding can be properly arranged.
winter
In winter, the temperature is relatively low, and the breeder's physique is relatively weak, and the conception rate is low. If there is no insulation equipment for the pups born, it is likely to freeze or freeze. Therefore, to be winter-producing, nutrient-rich feed must be provided to maintain a healthy constitution; there must also be insulation measures, generally requiring that the room temperature be not lower than 15°C, the nest of rabbits should not be lower than 30°C, and the young rabbits should require 20°C. surroundings.
Timely breeding
Determination of mating time of natural mating
(1) Determine breeding time based on female estrus performance. The estrus cycle of meat female rabbits varies greatly, usually in 8-15 days, and the estrus period is generally about 3 days. The estrus manifests itself in uncomfortable behavior and loss of appetite. It is often preceded by paralyzed cases or hindlimbs. Sometimes it has nesting phenomenon. The genital area is wet and swollen. The entire estrus period is divided into the early, middle, and late periods. The judgments are mainly based on the changes in the pudendal area: the early stage of estrus becomes more humid, slightly swollen, and pink; the middle stage is moist, swollen, showing a large red (commonly known as old red); and the latter is moist. , swollen, purple black. The best breeding time is in the middle and late stages of heat.
(2) The test method determines the mating period. Put the female rabbit in the male rabbit's box. When the male rabbit chases after climbing, if the female rabbit accepts the mating posture, it means that the female rabbit has estrus, and the breeding can be performed. Otherwise, they are not in heat and cannot mate.
(3) blood allocation. That is, the female rabbits are mated after 1-2 days after farrowing.
Determination of artificial insemination breeding time
Female rabbits are stimulating ovulatory animals and do not ovulate automatically without mating or drug stimulation. Therefore, ovulation stimulation is required before artificial insemination. Usually take injection of reproductive hormones to stimulate ovulation, the highest infertility rate within 2-8 hours after ovulation stimulation. In order to increase the conception rate, stimulation of ovulation should be carried out during the estrus.
Choose the right breeding time on the day of breeding
The spring and autumn seasons are best arranged from 8 to 10 am. The summer season uses the early morning and late evening when it is cooler, and the winter season takes place at the relatively warm noon. In addition, 1 hour before and after feeding should not be suitable for breeding.
Master the breeding program correctly
Checking male rabbits to create a suitable environment
Prior to mating, male rabbits should be examined. All male rabbits who are frail, poorly developed, diseased, and related have no ability to mate. Where conditions permit, semen quality checks should also be performed on male rabbits. After the male rabbit was identified, all the utensils in the male rabbit cage were removed and a large wooden board was placed on the bottom of the cage to prevent the rabbit claws from being caught in the cage slits.
Place the female rabbit in a male rabbit cage for breeding
The female rabbits with good estrus, good health, and appropriate breeding were gently placed in male rabbit cages for breeding. The male rabbits cannot be placed in the female rabbit cage for breeding. If the male rabbit is placed in the female rabbit cage, the male rabbit can easily affect the sexual desire activity due to the change of the environment, and even does not climb across the female rabbit, resulting in failure of the breeding.
Post-processing
Immediately after mating, immediately pat on the buttocks of the female rabbit. After the female rabbit has a tight body, the semen can be deeply inhaled, which facilitates the movement of the sperm from the vagina to the uterus and prevents the semen from flowing back. After that, the female rabbit was removed from the rabbit cage and checked for spuriousness in the vulva, and the female rabbit was sent back to the original cage for timely registration.
Compounding
In order to ensure that the female rabbits become pregnant and prevent false pregnancy, they must be reconstituted. There are two methods for compounding. (1) Repeated breeding. The same male rabbits were reconstituted 6-8 hours after the first breeding. According to experiments, the rate of conception of repeat breeding can reach 95-100%. (2) Double breeding. About 10 minutes after the first breeding, another male rabbit is used for the second mating. According to the experiment, the rate of adopting double-breeding can be increased by 25-30% compared with that of single-breeding. This method is only suitable for the production of commercial rabbits because it is impossible to judge the ancestry of the ancestry.
Do a good pregnancy test
Timely judge whether the female rabbit is pregnant. If it is not pregnant, it should be supplemented in time. Can use external observation method and touch tire method inspection.
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