Rex rabbits currently have American lines, German lines, and legal systems. Each line has its own advantages and disadvantages. American Rex rabbits have high fertility and Germany has low fecundity but have the greatest growth potential. In some places, crosses between strains are mostly used. In general, the American female rabbits are used as female parents, or the German or legal systems are used as male parents for economical crossbreeding, or American female rabbits are used as female parents, and the first male parent is used for hybridization. One generation of females was crossed and then crossed with the second male German line of rabbits to form a three-way hybrid. The hybrid offspring is directly fattened to ensure that the fattening rabbits have a large body, excellent quality, and good quality fur. At the same time, breeder breeding should be carried out in the breeding process. For example, females with good body shape, good shape, reproductive performance (combination conception rate, number of births, and weaning survival rate) and good motherhood should be used as reproductive female rabbits. The male rabbits with large body weight, fast growth rate, good coat density, high fertilization rate, and high survival rate of offspring were selected as breeding male rabbits to breed excellent rabbit populations. Thus, a large number of excellent offspring were selected to produce a large number of hides with large area and good quality.

Early weight gain techniques

Rex rabbit skin area is proportional to weight.

A large part of the rabbit's body weight depends on early development and weight gain. To achieve this goal, as far as possible to produce a major newborn rabbit, to do the following four points:

1 The female rabbits in the later stage of pregnancy should raise the level of feed nutrition and appropriately reduce the number of births of the female rabbits, so as to increase the primary weight of the rabbits.

2 The rabbits should eat colostrum as early as possible during the lactation period, and provide high-energy, high-protein feeds to the nursing mother rabbits so that the rabbits can eat nutrient-rich and sufficient milk.

3 The feed of weaned rabbits is to be nutritionally comprehensive, digestive energy to reach 12 MJ/kg, crude protein 20% to 22%, crude cellulose 6% to 10%; at the same time, appropriate amounts of vitamins, trace elements, and complex enzyme preparations should be added. Drug additives, etc., to ensure high nutritional value of feed, easy to digest, good palatability, to achieve the purpose of daily gain.

4 Weaned rabbits insisted on weaning and left the nest and lived in the original cage, so that feed, environment, and management were the same, minimizing stress complications, so as to ensure that the rabbits weaned 500 grams or more over 30 days, and 3 months of age. Weigh more than 2000 grams.

Pre-promotion of post-control technology

Because the quality of Rex rabbit fur is not only related to the area, but also related to the density of the coat and the maturity of the skin. If only the body weight and the area of ​​the skin are taken into account, the first skin area can generally be achieved under good husbandry conditions from 3 months to 5 months, but the thickness, toughness, and strength of the skin plate are insufficient, and the utilization value of the production skin is low. Pre-advanced post-control technology can make the rabbit skins of good quality. The skin will not contain extra fat and connective tissue. The density of the coat and the maturity of the skin plate can easily reach the standard; at the same time, it can save feed and reduce the cost of feeding. Before the promotion of post-control technology, it is to raise the nutrition level in the early period and control the nutrition level appropriately in the later period. The specific approach: weaned rabbits should increase the nutrition level of feed to the age of 3 months to 5 months, the protein content of 17.5%, and the use of free food, make full use of its early growth and development characteristics, tap their genetic growth Potential for proper control of feed nutrient levels thereafter. Two kinds of control methods are often used: one is to control the quality of feed, so that its nutrient level is reduced, energy is reduced by 1%, protein is reduced by 1% to 1.5%, and free intake is still adopted; the other is the control method, that is, the amount of feed is controlled. Feeding 80% to 90% of the free-feeding food each day, while the feeding standards and feed formulation are the same as in the previous period.

Timely skinning technology

The timely production of hides and skins is the most crucial step in the production of rabbits. The slaughter time should be determined according to the season, weight, and rabbit performance. Under normal circumstances, the body weight reaches 2.5 kg to 3 kg after May to June, and the coat is rich, thick, plush, and the thickness of the skin to meet the processing requirements (ie, the second age of hair replacement); Carefully check the hair removal and plush. Normally to avoid the spring and autumn season, slaughter is generally best before March and after March, but it must not be slaughtered during the hair-changing period.

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