The long-haired rabbits are mainly hair-producing, and the fine high-yield long-haired rabbits also produce excellent offspring while producing wool. However, as the amount of wool produced increases, the fecundity decreases. Many farmers generally reflect the difficulty of breeding long-haired rabbits, and it is more difficult for high-yield long-haired rabbits to breed. It is undeniable that the fertility of long-haired rabbits is indeed lower than that of rabbits and rabbits, but it is not difficult to grasp the main points and touch the habits and improve the fertility of high-yield long-haired rabbits.
Selection
The selection is critical, and the hair growth and reproductive performance of the long-haired rabbits are highly heritable. Rabbits must be selected for high yield, high fecundity, one-child litter size, good milk, and good maternal leave. age
The male rabbit is 10-20 months old and the female rabbit is 8-22 months old. Due to the large body size, late maturation, and late mating age of rabbits, rabbits and rabbits are younger than the age of rabbits and rabbits. Below these ages and higher than the above ages, the breeding effect is poor, and the yield and survival rate of the offspring are reduced. breeding
The season of breeding is best in spring, followed by winter and autumn, and in summer, breeding is stopped for 2 months. When mated, the length of rabbit hair is 10-50 days for male rabbits and 5-40 days for female rabbits. If the length of rabbit hair is more than one month, the hair of the male rabbit's leg is cut short and the female rabbit's tail hair is cut short. Such as the implementation of artificial insemination breeding, rabbit hair can not be cut after the tail. Regardless of natural mating or artificial insemination, the hair must be cut for more than 60 days, especially if it is accompanied by a species. After the fetus is found, the length of the rabbit hair must be cut after more than 60 days. Because long-haired rabbits grow in rabbit hair after 60 days, feed intake decreased significantly, nutrition can not keep up, affecting the growth of the fetus and the female rabbit milk production, but also affect the quality of the litter.
Artificial insemination
When high-yield long-haired rabbits naturally mate, long-haired mating is not easy to mate. Using artificial insemination techniques can not only improve the conception rate, but also save time and effort, reduce the spread of disease, and can make full use of excellent breeding male rabbits and breeding. The female rabbit reaches the same period of estrus and mating at the same time to facilitate management.
Preparation before insemination. One 200x microscope, one spermatozoa, hormones, slides, coverslips, saline, pusher No. 3, and a collection device. The production of the picker is made of a hard plastic tube with a diameter of 5 cm and is cut into a 6 cm section. The two ends are polished smoothly and a hole with a diameter of 1.3 cm is drilled in the middle so that the bottle can be inserted into the brine without leakage. The person uses a condom to cut off with a pair of scissors, put it in a plastic tube, roll it on both ends, put it on both ends of the plastic tube, and then tie it tightly with a rubber band so that it does not leak, and then put the other in a sterile package. Inside, used to collect male rabbit sperm.
disinfection. Put the inner tube of the collection sperm, the insemination device and the empty needle into the disinfection box, disinfect it with boiling water for 15 minutes, remove it after 15 minutes, rinse the inner tube, inseminator, and empty needle with saline for 2-3 times and put it back.
Kinds of rabbits ready. The hair around the genitals of the breeding male rabbit was cut short, the female rabbits ready for breeding were picked, and the injection of No. 3 was given, 0.5-1 micrograms per rabbit.
Picking. Put the sterilized inner tube into the eliminator and add about 45 degrees of warm water to the anaesthetic device. After filling, fill it with a cork stopper, plunge the needle into the tampon, blow it with a mouth, and pressurize it. After the pressurization, put a small amount of salt water before the picker to lubricate. When the sperm is collected, an assistant grasps the female rabbit, the sperm extractor holds the sperm in the right hand, the male grasps the back of the male rabbit in the left hand, the spermator points at the penis of the male rabbit, and collects the male rabbit while waiting for the male rabbit to crawl the female rabbit. Semen. After harvesting, gently release the warm water from the harvester and do not splash water into the finish.
Prenatal management
Before the female rabbits get pregnant, they should not change their raw materials to prevent stress while increasing their nutrition. Five days before childbirth, the female rabbit is placed in a special litter for the female rabbit or placed in a litter box and placed in clean grass and cotton. Let the female rabbit be familiar with the new environment and new smell in advance. Two days before delivery, the female rabbit's abdomen hair was pulled out to reveal the nipple. In particular, female rabbits born first, the female rabbits are best to pull out the hair near the nipple in advance, so that the newborn rabbits can easily drink colostrum.
Why do long-haired rabbits pull their hair out in advance? The difference between long-haired rabbits, rex rabbits and meat rabbits is on rabbit hair. The hairs of the long-haired rabbits are longer and stronger than those of the rex rabbits and the meat rabbits. The female rabbits may feel pain when plucking. This is also the reason why the long-haired female rabbits are unwilling to plucking themselves when they are born puppies. After 31-32 days after manual plucking, most females gave birth and fed colostrum between litters and calving boxes. Individuals who had no calves and colostrum fed were intramuscularly injected with 0.5 ml of oxytocin. And artificially forced feeding of colostrum, most of the female rabbits will automatically breastfeed on time after 3-4 forced breast-feeding, and individual female rabbits that do not automatically breastfeed on time, have poor milk, and have poor motherhood will be resolutely eliminated to avoid regeneration of inferior offspring rabbits. After the breeding effect.
Postpartum management
Whether the female rabbit is able to have a farrowing and a litter size is very important for postpartum management. When the mother has too little litter to produce enough milk for a small amount of stimulation, an intramuscular injection of 1 ml of oxytocin can be given. . The key is the number of suckling rabbits. The long-haired rabbits are pregnant with their babies because of their hair production. They then produce milk and consume a lot of energy. The long-haired rabbits have larger heads than rabbits and rabbits, and have a large amount of milk. Hairy rabbits produce relatively less milk, plus long-haired rabbits produce mainly hair, hair follicles, thick skin milk is not easily sucked out of the pups, so we must master the number of breast-feeding.
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