With the increasing level of large-scale farming and the low level of domestic broiler breeding management, there are more and more problems in broiler breeding. The more vaccines are used, the more veterinary drugs are used, the more diseases, the more diseases The more difficult it is to treat. The reason is that people tend to focus on disease prevention and control without paying attention to the improvement of chicken body itself, ignoring that many diseases are caused by the imbalance of nutrient levels of chickens, especially the impact of vitamins on the health status of chickens.
The effect of a variety of vitamin deficiency on the performance of broilers
1 The effect of vitamin A deficiency on the growth and development of broilers
Vitamin A deficiency can cause chicken thymus and bursa to shrink, reducing its humoral and cellular immune function. The main symptom when it is lacking is a milky secretion in the eye, the eyelids are swollen, the upper and lower eyelids are often glued together, the cornea is turbid, and there is a cheese-like secretion in the eye. Poor appetite is weak, thin, feathers are loose, claws, sputum is light, crown is white and wrinkled, toes are weak, gait is unstable, can not stand, occasional neurological symptoms, head and neck twist, for circular motion.
2 The effect of vitamin D3 on the production and development of broilers
Vitamin D deficiency inhibits the cellular immune function of the body, and vitamin D3 is the most important type of vitamin D in chickens. In the absence of chicks, the growth and development of the chicks is poor, the feathers are loose, the legs are weak, the jaws and claws are soft and flexible, and the walking is unstable, often resting in the hocks. The joints of the hocks and the ribs are swollen, and the joints between the ribs and the costal cartilage are obviously enlarged, forming a round nodule, bending the sternum, deforming the leg bones, and reducing the chest cavity.
3 The effect of vitamin B1 deficiency on the performance of broilers
Vitamin B1 is also known as thiamine and anti-neuritis vitamins. It is a coenzyme of many enzymes in broiler chickens. It participates in the metabolism of carbohydrates and plays a role in maintaining the normal function of nerve tissue and myocardium, maintaining normal intestinal peristalsis and fat absorption in the digestive tract. Chicks lack thiamine for about 1 week, and suddenly, they show anorexia, weight loss, poor growth, feathers, dullness, weakness, gait instability, and some sick chickens appear squat. With the development of the disease, the symptoms of polyneuritis gradually appear. The legs, wings and neck of the sick chicken land on the tail, sit on the ground or fall to the side of the ground, and the head is extremely twisted backwards, showing a special "gazing star." "Position, sick chicken body temperature abnormalities, severe failure and death. Adult chickens develop slowly and often appear in the absence of thiamine for 3 weeks. At the beginning of the disease, the appetite subsided, the feathers were loose, the legs were soft and weak, the cockscomb was blue-violet, and the neurological symptoms gradually appeared. The flexors, legs, wings and neck extensors of the toes gradually became paralyzed, and some sick chickens had symptoms of anemia and diarrhea. .
Vitamin B2 deficiency is a nutritional deficiency disease characterized by inward flexion of the toe claws of the diseased chicken and disorder of substance metabolism. Chicks occur mostly at 1-3 weeks of age. The sick chickens grow slowly, lose weight, have feathers and dullness, reduce fluff, and subsequently develop digestive dysfunction, loss of appetite, diarrhea, reluctance to walk, and weakness. The characteristic symptoms of this disease are swelling of the heel, tortion of the toe claws, weakness of the leg muscles, sagging wings, inability to maintain a normal posture, and dry and rough skin. When forced to drive, walk with the weight of the fly, and spread the wings to maintain the body balance. By the end of the disease, the chickens were squatting on both legs, and they could not afford to sleep completely. Finally, they could not eat food and died.
5 Effects of biotin deficiency on performance of broilers
Biotin can affect the formation of feather pigment, the formation of antibodies and the development of bone. When biotin is deficient, the chicks exhibit poor appetite, slow growth, dry and brittle feathers, inflammation of the skin around the eyes, sputum and claws, and scarring of the bones. Broilers of 1-3 weeks old are prone to fatty liver and kidney syndrome. Chicks of 3-4 weeks old are prone to sudden death syndrome.
4 The effect of vitamin B2 deficiency on the performance of broilers
Vitamin B2 deficiency is a nutritional deficiency disease characterized by inward flexion of the toe claws of the diseased chicken and disorder of substance metabolism. Chicks occur mostly at 1-3 weeks of age. The sick chickens grow slowly, lose weight, have feathers and dullness, reduce fluff, and subsequently develop digestive dysfunction, loss of appetite, diarrhea, reluctance to walk, and weakness. The characteristic symptoms of this disease are swelling of the heel, tortion of the toe claws, weakness of the leg muscles, sagging wings, inability to maintain a normal posture, and dry and rough skin. When forced to drive, walk with the weight of the fly, and spread the wings to maintain the body balance. By the end of the disease, the chickens were squatting on both legs, and they could not afford to sleep completely. Finally, they could not eat food and died.
6 The effect of vitamin C on the performance of broilers
(1) Vitamin C and stress
Vitamin C plays an important role in the synthesis of steroid hormones, which have the effect of mobilizing energy in the body to maintain vital functions (such as maintaining body temperature). Lack of vitamin C can result in an insufficient amount of corticosteroids, reducing the animal's ability to maintain body temperature. Therefore, animals with sufficient vitamin C supply are generally significantly less likely to die during heat stress.
(2) The role of vitamin C in immunity
When a bacterial infection occurs, the effect of white blood cells is related to the concentration of vitamin C in the blood. When vitamin C in the blood is exhausted, the ability of white blood cells to phagocytose bacteria decreases. In addition, when phagocytosis proceeds, the content of vitamin C gradually decreases. Therefore, the most important thing at this time is to supplement the chicken with vitamin C to ensure that the white blood cells continue to mobilize to fight the disease. During stress, when the chicken's immune function declines, vitamin C supplementation will improve the immune factor's effect on the immune system, thereby protecting the immune system and reducing the immune response.
(3) Vitamin C helps bone formation
At present, the incidence of broiler leg weakness has been greatly improved. The main reason is due to the difference in muscle growth and slow bone development in modern breeders. The resulting economic loss can be as high as 15% of total revenue.
(4) Vitamin C helps to eliminate the toxicity of toxic substances
The involvement of vitamin C in the detoxification process of various toxic substances is due to the importance of vitamin C for the activity of various enzymes in hepatocytes. 2.7 Vitamin E deficiency will prevent the development of the bursa, if the lack of selenium will hinder the development of the thymus.
Prevention and treatment of multiple vitamin deficiency syndrome
Actively treat the primary disease such as white peony and coccidia, and use antibiotics with caution to promote normal gastrointestinal function.
Stop feeding the metamorphic feed, and according to the proportion of the feed formula, properly feed the fish-rich feed such as fish meal, meat powder, blood meal, rice bran, yeast, and vegetables.
During the feeding period, regularly add 1-2 times of conventional vitamins to multivitamin additives, such as 1 kg of feed mixed with vitamin A 1-2 million units, vitamin D500 units (or cod liver oil 10 ml), vitamins B1, B2, E 5-10 each. ML, vitamin K3-8 ml. If vitamin E is deficient, it should also be mixed with sodium selenite 0.05-0.1 mg in 1 kg of feed, and add eucalyptus powder and green material. In severe cases, the dosage can be increased for individual administration, and the condition can usually be controlled within 1 week. Once the symptoms of the sick chicken are eliminated, the amount of vitamin supplements should be restored to normal levels to prevent excessive poisoning. You can choose the functional composite multi-dimensional element produced by some professional manufacturers.
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