Causes of nutritional and metabolic diseases in chickens

1. Insufficient intake of nutrients; insufficient supply of ① diets; lack of protein (especially essential amino acids), fat, vitamins, mineral trace elements and other nutrients in ② diets; insufficient intake of nutrients caused by ③ lack of appetite.

2. the demand for nutrients increases, but it is not supplied in time, for example, under pathological conditions, the consumption of nutrients in the body increases. Nutritional and metabolic diseases such as febrile diseases, parasitic diseases and diarrhoea.

3. Dyspepsia and malabsorption of nutrients such as gastrointestinal tract, liver, kidney and pancreas affect not only the absorption of nutrients, but also their synthesis and metabolism in animals. Poor feeding and management conditions are also the inducement of the disease.

4. Imbalance of nutrients the relationship between nutrients in the body is complex, in addition to the special role of nutrients, but also through transformation, coordination or antagonism to maintain the balance: for example, the absorption of calcium and phosphorus requires vitamin D; too little phosphorus will affect the deposition of calcium; more calcium in the diet will affect the absorption and utilization of copper, manganese, zinc and magnesium. Deficiency of selenium and sulfur-containing amino acids in diet can lead to vitamin E deficiency. Some anti-nutritional factors in feed are also the main causes affecting vitamin activity and absorption.

5. Feed, feeding methods and environmental changes cage @ # @ 230mg / kg can not get vitamin K from feces; in order to control coccidiosis, drugs are added to the diet, which affects the synthesis and absorption of some vitamins such as vitamin K and Bl. Therefore, when looking for nutritional deficiencies, we should pay attention not only to primary or absolute deficiencies, but also to conditional or relative deficiencies.

6. Improper stacking, storage and processing of feed lead to the destruction of some nutrients, especially vitamins, and lead to nutritional deficiency, such as feed being exposed to sunlight, rain, fermentation and heat production or rancidity during storage for too long, or processed at high temperature.