Cod liver oil is rich in vitamin A. The nutritional effects of vitamin A on the body of livestock and poultry and the symptoms of deficiency are mainly the following: First, it has a normal visual function. When it is lacking, it is prone to night blindness. Second, in the formation of sex hormones, the degeneration of the testis and the epididymis occurs, and the quality of the semen decreases, and the estrus abnormalities, dystocia, miscarriage, and deformity increase in the female animals. Third, it has the integrity and integrity of the protective epithelial tissue structure, promotes the synthesis of mucopolysaccharides in tissues, maintains the integrity and normal permeability of cells and cell membranes and organ structures, and in the absence of mucopolysaccharide synthesis, causes epithelial tissues. Dry and keratinized, prone to bacterial infections and a series of lesions, especially to the eyes, respiratory tract, digestive tract, genitourinary tract. Fourth, it has the effect of promoting the growth of young animals. In the absence, it will affect protein synthesis and the development of bone tissue. Fifth, it affects the nervous system. When there is a lack of bone tissue dysplasia, the central nervous system will be impaired. According to a large number of studies at home and abroad in recent years, during the feeding of cockroaches, the addition of cod liver oil has the following good results and effects.

First, reduce deformed eggs and increase egg production rate. Vitamin A can be involved in the formation of sex hormones. In practice, young crickets that are initially produced should have a ratio of calcium to phosphorus of 2:1 in the diet. However, there are still many soft-shelled eggs and broken eggs when laying eggs, and the eggs, spots, luster, and size all fail to meet the requirements. This phenomenon also occurs in adult male and female polycultures. If cod liver oil is added to drinking water (by volume, the prevention amount is 2%, and the treatment amount is 5%), the number of misshapen eggs will be significantly reduced, and the egg production rate will also be significantly increased.

Second, it can reduce the harm to stress caused by stress. At the peak of egg production, when you are frightened, you often bump around. If you pause for a while, there will be a small number of severe neurological symptoms (usually about 5%). Mainly manifested in the rapid fall to the side, the head is biased to one side, the wings continue to thump to do rotary movements, intermittent head bowing, feathers scattered, spiritual malaise, a small part of the coma convulsions to death. If a therapeutic amount of cod liver oil is added to drinking water, after the flea group is frightened again, the above symptoms will generally no longer occur, and stress symptoms will also be significantly relieved.

Third, can enhance the body resistance to disease. Cod liver oil is mainly used clinically to treat night blindness and dry eye caused by vitamin A deficiency. In addition, it can also be used to enhance the body's resistance to disease. Joining drinking water can protect the integrity of the epithelial tissue and can increase the defense against external pathogenic microorganisms. At the same time, it can also affect the body's protein synthesis and calcium absorption, which can affect the growth and development, but if long-term use, there will be accumulation of poisoning occurs, especially when the feed lipids are more, because vitamin A is fat The soluble vitamins are expensive and should be used scientifically.

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