Rex rabbit, scientific name Rexrabbit, is a typical skin rabbit. Because its fur is soft and dense, resembling a otter, it is commonly known as Rex Rabbit in our country. With the improvement of people's living standards and the increase of awareness of wildlife protection, Rex rabbit skin has become a high-grade suede material that replaces wild animal hides and has high economic value. At present, the price of first-class cooked skin is 60-70 yuan per sheet, 40-50 yuan for second-class cooked skin, and 20- 30 yuan for third-class cooked skin. The international fur market has great demand for high-quality rex rabbits, especially in markets such as the United States, Japan, Europe and Hong Kong and Macau. China Rex Rabbit Breeding has covered dozens of provinces across the country. Rex rabbit fur products have entered the international market and have created a large amount of foreign exchange for the country. The purpose of feeding rabbits is to produce high quality rabbit skin while producing rabbit meat. After experiencing high prices from 2004 to early 2005, the prices of rabbit skins fell from wave to wave in 2005-2006, and the recent market price has fallen by 15%-20% compared with the same period in 2004. While the price is falling, the quality requirements Tightening. The basic trend of the current market is: a special grade of leather is still well-selling, the middle of the skin appears to be slow-moving, no one cares about the lower level of the third-grade leather. Recently, many rabbit farms produce only 60% to 70% of hides, and the remaining parts are “defectives†and cause pressure storage. It can be seen that due to the maturity of the market and the development of the industry, people have put forward higher requirements for the quality of rabbit fur. The quality of rabbit skin is basically in short supply, while the market for low quality hides is shrinking. The fur quality has become the development of the rabbit industry. "Bottleneck". This article summarizes and analyzes the factors affecting the quality of Rex rabbit fur and its improvement measures for the reference of the majority of Rex rabbit breeders and scientists. Factors Affecting Rex Rabbit Fur Quality There are many factors that affect the quality of Rex rabbit fur, including breeds, nutrition and feed, disease prevention, slaughter and skinning, and processing methods. Variety selection Variety factors are the key to determining fur quality. If the breed is not pure, the breed is degenerate or the body shape becomes small, it will directly affect the color of the fur, lose the original color characteristics, there is a mixture of hair color, villi is sparse, the density is reduced, the flatness is poor, the area of ​​the skin is small, etc. Rex rabbit fur quality does not meet the requirements. According to general rules, the rex rabbit has a large body shape, large area of ​​fur, and high commodity value. Therefore, it is important to pay attention to the breeding and breeding of rabbit breeds. We must strictly eliminate rabbits that do not meet the standard of breeding rabbits and breed high-quality core rabbit breeds to effectively improve the quality of rabbit fur. Nutrition and feed Nutrition and feed have a great influence on the quality of fur. If the long-term nutrition level is low, the growth and development of rabbits will be hindered, the individuals will become smaller, and the area of ​​the skin will not conform to the grade. Petersen et al. fed free-feeding or limited-feeding (75% free-feeding) rabbits (rex rabbits were born in June and slaughtered in December). The results showed that compared with the free-feeding group, the weight-reducing group rex rabbits lost weight 11%, carcass moisture content increased by 4.1%, protein content increased by 0.7%, and fat content decreased by 4.9%. These effects were statistically significant; the restricted food group had significantly longer hair fibers than the free-brewed group (3.8 cm, respectively). And 2.9 cm), the skin area was significantly smaller than the free-feeding group (a decrease of 5%). However, if there is excess nutrients, there will be cases where the abdomen hairs have not been exchanged and the back hairs have been replaced again, which will also have adverse effects on the quality of the fur. Among the nutritional factors, energy and protein in the diet are the main factors affecting the growth and fur quality of fur animals. According to reports, when dietary digestive energy was 10.88 MJ/kg, crude protein was 18.5%, and crude fiber was 12%, rex rabbits grew faster and their fur quality was better. Ren Keliang et al (2004) research on the energy and crude protein requirements of growing rex rabbits from weaning to slaughter show that low energy and high protein diets (digestive energy 10.97 MJ/kg, crude protein 18.98%) and high energy and high protein diets (Digestive energy 11.31 MJ / kg, crude protein 19.36%) is conducive to the quality of Rex rabbit coat. The lack of protein in feed, especially the deficiency of sulfur-containing amino acids, can lead to degeneration of hair quality, loose hairiness, decreased strength of wool fibers, and a significant increase in hair hair. Studies have confirmed that the supplementation of sulphur-containing amino acids (methionine and cystine) in the diet of long-haired rabbits can significantly increase rabbit hair production (38.5%) and high quality hair ratio (19.9%). When a proper amount of methionine was added to the diet to increase the content of sulfur-containing amino acids to 0.70%, the amount of wool produced was significantly increased, and the quality of rabbit hair was also improved. However, the excessive addition of methionine (such as when dietary sulphur amino acids reach 0.96%) has a negative effect on hair production. In addition, the lack of vitamins and trace elements often causes the coat to fade, become fragile, and even depilate. Biotin is an important water-soluble sulfur-containing vitamin that is widely involved in the body's metabolism; due to the low concentration of biotin in the natural world and limited bioavailability, deficiency and lack of biotin can also occur, resulting in disturbance of the body's metabolic function, resulting in retinal rabbit production performance The decline and the weakening of the disease resistance and lead to a decline in fur quality. When choline is synthesized in vivo, methionine is supplied to the methyl group, ie, 3 molecules of S-adenosylmethionine are consumed each time the body synthesizes 1 molecule of choline; in the absence of choline, the kidney is damaged, and the fur is rough and sparse. Intensify methionine deficiency. Copper is a component of tyrosinase, which catalyzes the formation of melanin by tyrosine, and copper deficiency causes the coat to fade. Copper can oxidize sulfhydryl groups to disulfide bonds to promote hair growth. The bending of the hair is determined by the disulfide groups in the hair proteins. The disulfide group determines the presence of copper in keratin protein synthesis. Copper deficiency affects keratin protein synthesis. The various amino acids in the polypeptide chain are linked to each other, thereby causing abnormal changes in the hair fibers, reducing the degree of bending, weakening of the hair's tension and elasticity, and reducing the textile performance. The addition of a certain percentage of copper to the diet has a positive effect on the growth of rabbit hair. The effect is significant when the amount of additive is 50 mg/kg; the effect on the thickness of the skin is significant when the amount of added copper is 10 mg/kg. With the increase of the added amount, the thickness of the skin plate decreased, showing a dose effect. This may be related to the different amounts of copper applied to different tissues in rabbits. Disease prevention and treatment If the cage is wet, the sanitary conditions are poor, and the rabbit body is not clean, the rex rabbit fur will be messy and heavy will lead to various diseases. The occurrence of the disease not only adversely affects the health and growth of the rabbit, but also affects the quality of the fur. Some diseases may even directly cause damage to the skin and coat and reduce the quality of the fur, such as rickets, rabbit lice, aphids, dermatomycosis, subcutaneous abscesses, etc., which can make the rex fur uneven or cortical ulceration into a hole; Rex rabbit cortex is weak and boring, the skin is rough, soft, poor toughness, fur irritability, lack of luster, lost the value of the skin system. Slaughter age Age has a great influence on the quality of fur. In general, the quality of adult rabbit skin is better than that of young rabbit skin. In the young rabbits before April, due to lack of fullness of the villi, the replacement of the fetal hairs was not complete, the quality of the plate was thin, and the product value was not high. 5-month-old to 6-month-old rabbits weighing 2.5 to 3 kilograms in body weight, dense villi, lustrous lustre, moderate plate thickness, skin removed to reach a skin area standard, and the highest skin quality at this time good. Aged rabbit skin has dry hair, poor wool fiber pull, dark color, hard and coarse plate quality, and low commercial value. Take skin season The skin season had little effect on young rabbits, but adult rabbits and older rabbits had the best quality of winter hides. The picking season is best chosen at the end of winter and early spring, from November to March of the following year. At this time, the fluff is rich, the gloss is good, and the quality of the board is excellent. Because of the cold weather in winter, the rabbit fur is thick and long, the hair surface is neat, the color is lustrous, and the quality of the plate is thick; in the spring when adult rabbits and old rabbits exchange hair, the rabbit fur is long and thin, and the underlying cashmere is sparse, and the rough surface is not processed and stored. Methods It is advisable to take the method of “skinning after skinning, skin separation and then bleeding,†so that the skin is less defaced. The specific method of operation: After a rabbit has died of fainting after being struck by a rod or electric shock, the skin is peeled off into a flat leather tube facing outwards and outwards. Then the skin plate is pulled open from the ventral midline with a razor blade and is flattened on the cardboard. Put small nails around the fur and let the fur dry. The overcast hair fur is paired with the fur and the skin is overlapped on the head and tail. Then, a small bundle of every 10 pieces of skin and a large batch of 50 pieces of leather are placed in sacks, sprinkled with insect repellent and sealed. During peeling, processing and storage, pay attention to the following issues: First, prevent the knife from injuring the skin and cause a hole during skinning; secondly, open the file along the ventral midline; otherwise, it will affect the specification of the skin type and reduce the area of ​​the skin; It is the oil on the skin that needs to be scraped, especially if the neck is to be scraped, otherwise it will affect the elongation of the skin or the defects of the neck after drying. The fourth is to create suitable temperature and humidity conditions when drying, and it is best to use air drying. Dry with a heat source, temperature and humidity can not be too high, the optimum temperature is about 10 °C. Relative humidity of 55% to 65%, otherwise it is easy to cause boring board and cause hair loss; Fifth, after the skin board is dried, it is properly sorted and packaged, and the dried skin is finished and packaged in time. The rabbit fur is applied to the quilt and the skin. The board stacks the layers of the board. Do not fold when sorting the packaging, and keep the skin flat. Sixth, during the storage process, check it regularly and keep it properly. Prevent the occurrence of old skin, smoked skin, moldy skin, and suffocation. Hand massager Hand massager Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizon.com