The main purpose of rearing long-haired rabbits is to obtain high-quality, high-yield rabbit hair, and the potential for hair growth of long-haired rabbits varies with the quality of rabbits and the level of feeding. Production practice shows that the rate of change in wool production rate of long-haired rabbits ranges from 20% to 35%, and extremely high individual production rate can reach 40%. Individuals with more than 40% have almost no. The length of rabbit hair growing per day is 0.7-0.8mm, and the fastest growing can reach 0.9mm. At present, China's long-haired rabbits, the hair production rate is 20% to 2.5%, in the rabbit hair price is high; stage is profitable; once the rabbit hair prices fall, raising this quality of long-haired rabbit Do not make money, or even lose money. Therefore, the breeder must do everything possible to increase the hair production rate, so as to improve the rabbit hair production and economic efficiency, and to survive with quality. 1 Factors affecting rabbit hair production 1.1 Variety Different breeds of long-haired rabbits have different hair-producing properties and hair quality. For example, when the previously introduced West German long-haired rabbit had the best hair production performance, the female rabbit had an annual production of 1400 g or so, and the fine hair content was 91%; while the French long-haired rabbit had an annual production of 1200 g. The fine hair rate is 80% to 87%; at present, the annual yield of local elite breeds cultivated in China reaches 1750-2000g, the fine hair rate reaches 85%, and the quality has reached and exceeded the international advanced level, showing the importance of genetic factors. Therefore, in order to improve rabbit hair production, breeders should choose to breed good long-haired rabbits. 1.2 Age Because of the different ages of woolly rabbits, the yield and quality of wool are also different. In general, young rabbits have low hair yields and coarse hairs; with age, the rabbits' hair yield and quality are continuously improved, and the rabbits' hair yield and hair quality are optimal at the age of 1 to 3 years; For rabbits over 3 years of age, the hair yield and quality decrease with the age of the rabbit due to the loss of metabolism. 1.3 Weight Weight is positively related to wool production. That is to say, under conditions where the rabbit hair density is similar, the body size of the individual with large body size is also large, the amount of contained hair is large, and the yield of the hair is high; on the contrary, the amount of wool produced is low. When selecting seeds, the larger the individual, the better the rabbit's hair density is. 1.4 Gender Long hair rabbits are different from other domestic animals in that the production performance of male rabbits is not as good as that of female rabbits. In general, the annual production of female rabbits is 15% to 20% higher than that of male rabbits of the same weight. 1.5 Nutrition Individuals with high genetic heredity and wool quality are also affected by feed nutrient levels. Feed contains rich protein, good feed quality, amino acid balance, especially sulfur rich amino acids, can promote hair follicle growth, increase hair diameter , In order to improve the production of hair; otherwise, rabbit hair production is low, poor quality. 1.6 Season The season affects rabbit hair production and quality. The highest wool production in winter, the best hair quality; followed by spring and autumn; summer rabbit hair production is the lowest quality is also the worst. The cold can stimulate the growth of rabbit hair. In the cold season, rabbit hair grows faster than warm season. 1.7 Lighting Light is an excitatory factor in the environment that not only promotes gonadal development but also promotes rabbit hair growth. In production practice, it is found that under natural lighting conditions, the gross hair yield of rabbits in rabbit stables is increased by 15% to 20% compared to the long-haired animals in long-term insufficient illumination. The amount of wool produced by the rabbit is about 30% higher than the amount of wool produced under natural light conditions. 2 Technical measures to increase wool production 2.1 Establish a high-yielding rabbit population When the first construction site is built, it is necessary to introduce the high-yielding old farms; because there are mostly high-yield farms that have been selected after breeding through periodic changes, the quality of the breeding rabbits is guaranteed. The introduced breeding breeds of offspring must also be selected from generation to generation. Individuals with strong reproductive performance, large individual size, and high production rate are selected to gradually develop a high-yielding rabbit population that is superior to the quality standards introduced. This high-yield rabbit group should be based on 1 to 3 year-old rabbits. If there are surplus male rabbits in the rabbit population that do not participate in breeding, the male rabbits should be castrated and the amount of wool produced after castration can be increased by 10% to 15%. 2.2 Improve the feeding environment In summer, the rabbithouse temperature should be maintained below 30°C, which is beneficial to the growth of rabbit hair. Although rabbits grow at low temperatures, the temperature in winter rabbithouses should not be too low, otherwise their life activities will be affected and the hairiness will also be affected. The yield. The temperature in winter rabbithouses is preferably kept at -5 to 10°C. When winter sunshine time is short, it is necessary to pay attention to artificial light, including natural light time, and the light should reach 16 hours. The light intensity when lighting is supplemented is 3~4W light bulb per square meter of rabbit house floor. 2.3 Increase the number of shearing Studies have shown that rabbit hair grows fastest in hairy rabbits within one month after shearing, followed by the second month, and hair growth slows down at month three. The hair-raising period was changed from 91 days to 61 days, and the total annual hair production could be increased by 20% to 25%; the hair-raising period was changed from 91 days to 73 days, and the total annual hair production could be increased by 10% to 15%. Therefore, under the condition of ensuring good hair quality and obtaining better economic benefits, shortening the hair-raising period and increasing the number of shearing hairs is also a measure to increase the wool yield. 2.4 Improve Feed Nutrition Feed nutrition is closely related to hair production, hair quality and hair quality of long-haired rabbits. In addition to full price and balance, feed also needs special materials. Here are some special additives. 2.4.1 Powdered meal contains high-quality animal protein, and also contains biologically active substances. Each rabbit is guaranteed to eat 1g of lotus root powder every day for 2 to 3 months; or each rabbit is guaranteed to eat 6g of lotus root each day. Gross can be increased by 10%. 2.4.2 Amino acids It was determined that the sulphur-containing amino acids in the rabbit hair were about 15%. Experiments have shown that the content of sulfur-containing amino acids in feed reaches 0.6% to 0.8%, and rabbit hair yield can be increased by 15% to 27%. Add 20-30 mg of cystine to each long-haired rabbit feed every day. After 20 days of continuous use, stop for 3 days for 1 course of treatment. After 2 consecutive courses of treatment, wool production can be increased by 6% to 17%. 2.4.3 Feather Protein Powder Washes feathers and hair and hydrolyzes the keratin proteins with acids or bases to produce a complex of amino acids and peptide chains. Cystine and cysteine ​​are abundant and easy to digest. absorb. Adding 1g per day to the long-haired rabbit's feed, for 60 days, can increase rabbit hair production by 16.6%. 2.4.4 Raw eggs Every 5 rabbits produce an average of one raw egg per day in the feed, mixed in the feed, and the feed is made into pellets, which can increase the amount of wool produced. 2.4.5 Minerals 1 Trace Elements Adding 1% of compound trace element additives to the feed of long-haired rabbits can increase wool production by about 20%, and increase the resistance of long-haired rabbits to disease. The compound trace elements can be formulated by themselves: the ratio is 30% of zinc sulfate, 30% of copper sulfate, 33% of ferrous sulfate, and 7% of cobalt chloride. 2 Sodium humate 3% to 4% of the sodium humate solution, each rabbit with an average of 2mL per day, sprayed on the pellet feed, feed or feeding: feeding on the grass, can increase the rabbit hair production by 20%. 3 The latest research of rare earth elements proves that adding 0.03% to 0.05% of rare earth elements in the long-haired rabbit feed can increase the wool production by 8.5% to 9%, and the high-quality hair rate can be increased by 43% to 50%. 4 boiling right powder production practice has proved that in the long-haired rabbit feed zeolite powder added, each rabbit 10g per day, once every 3 months, the gross output can be increased by about 30%. 2.4.6 Each rabbit fed with vitamin hairy rabbits is fed with 0.6-1.2 mL of cod liver oil per day after shearing. After 20 days of continuous use, it can increase wool production by 10%; after shearing, each rabbit is injected with 250 μg of VB1 daily for 3 days, or Oral administration of 1/4 tablet of compound vitamin B1 for 1 month can increase wool production by 15%. This is because VB1 can increase the appetite of long-haired rabbits, which can increase the utilization of protein and promote the metabolism of sulfur amino acids in rabbits and accelerate the growth of rabbit hair. 2.4.7 Special ingredient 1 pine needle powder pine needle powder contains 19 kinds of amino acids and rich in carotene, vitamins, trace elements and pine needle antibiotics. Adding 1% to 1.5% pine needle powder to feed can increase wool production by 10%. 2 At the mature stage of seed, the leaf protein content was 13.6%, crude fat content was 4.4%, crude fiber content was 19.3%, nitrogen-free extract content was 45.7%, and ash content was 7.4%. It also contained various vitamins, minerals, and phytoalexin. , side flavonol, juniper oil, etc. Add 1.5% wormwood powder to the long-haired rabbit feed. The growth rate of young rabbits can be increased by 18%, and the amount of wool produced can be increased by 7.5% to 8.2%. 3 Tulou Loach is a traditional Chinese medicine and there are many wild species in the mountains. Tofu with 30% of earthworms, 30% of silkworm eggs, 30% of animal growth hormone, and 10% of sulphur, added 3.5% to the production of rabbit feed, can shorten the hair-reducing period by 3 to 5 days, and increase wool yield. 5% to 6%.
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