Fundamental nutrition imbalance Imbalanced female performance in three aspects: lack of nutrition, excess nutrition, nutritional imbalance.
Lack of nutrition: low nutritional value of feed or the amount of daily investment is insufficient to ensure the nutritional needs of the female rabbit, female rabbits will appear rough hair messy, thin body, back arch and other symptoms. When the female rabbit is too thin, the endocrine system is affected, the secretion of gonads is disordered, and the estrous cycle or estrus cycle is prolonged. At the same time, the uterine mucosa is thin, and even if it is allocated, it is not easy to take a placenta. Nutritional levels are too low, hypothalamic secretion of gonadotropin-releasing factor is inhibited, other hormones are also affected, endocrine disorders affect the survival of embryos, resulting in reduced reproductive rates.
Excess nutrient: The nutrient level of the feed is too high, or the feeding amount is often excessive, making the female rabbit too obese. Over-fat female rabbits have a high body fat content, and there are many fat deposits in the fallopian tube wall, and the elasticity becomes smaller, and it is difficult for the egg to move to the ampulla of the fallopian tube, which hinders the combination of the sperm and the egg.
Nutritional imbalance: The protein, fat, and carbohydrate in the feed should be properly proportioned, otherwise it will affect the feeding effect. Taking Rex Rabbit as an example, its feeding standards are 17%~18% of crude protein, 3%~5% of crude fat, 10~11 MJ of digested energy per kg of feed, and 12%~15% of crude fiber. If the amount of corn is large (digestion energy per kilogram of feed reaches 12 MJ) and the amount of protein feed is small (less than 15% of crude protein), the breeding rate of rabbits will be reduced.
Vitamin deficiency Vitamins associated with reproduction are vitamin A, vitamin D, vitamin B1, and vitamin E.
Vitamin A: Vitamin A plays an important role in the growth, reproduction, and disease resistance of rabbits and is essential for the maintenance of normal epithelial cells in tissues and organs. In the absence of vitamin A, keratinization of the genital epithelial cells renders the reproductive system dysfunctional.
Vitamin D: Vitamin D can promote the absorption of calcium in rabbits and promote the growth of rabbits. If it is lacking, the rabbit will suffer from loose bone and impaired reproductive performance.
Vitamin E: Vitamin E, also known as tocopherol, acts as an antioxidant in rabbits and prevents the oxidation of unsaturated fatty acids in the body. When vitamin E deficiency in rabbits occurs, unsaturated fatty acids in rabbits are excessively oxidized, resulting in excessive peroxide production, which can cause changes in morphology and function of reproductive organs, destruction of germ cells, and reproductive problems.
Vitamin B1: Vitamin B1, also known as thiamine, is a coenzyme part of the oxidation and decarboxylation reactions of keto acids in sugar metabolism in rabbits. In the absence of vitamin B1, pyruvate metabolism is impeded, causing the accumulation of pyruvate in the brain and blood to cause poisoning. Due to impaired glucose metabolism, insufficient energy supply, resulting in neurological dysfunction, the female rabbit will appear ovarian atrophy, follicular development is arrested, embryos are absorbed and there is empty, pregnant females have stillbirth, miscarriage, rabbits have poor vitality after production, milk production Decline and so on.
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