What is the specific effect of adding salt to the feed?

I would like to ask you, what is the specific function of adding salt to the feed? Can you tell me more about it? The chemical composition of salt is mainly sodium chloride, which is an important mineral in livestock and poultry feed and an essential substance to maintain life activities. Sodium can maintain the acid-base balance of blood and tissue fluid, regulate the stability of normal osmotic pressure, stimulate the secretion of saliva and promote the appetite of livestock and poultry. Sodium can promote the synthesis of organic compounds such as fat and protein in the metabolic process, keep the digestive juice alkaline in the intestinal tract, activate amylase, and keep gastric juice acidic and bactericidal. Lack of salt or insufficient salt content in feed will cause loss of appetite, digestive disorders, and develop pica. In severe cases, livestock and poultry are lethargic, stunted or lose weight. If sows and cows do not eat or eat less salt, the milk will be reduced, affecting the healthy growth of piglets and cowboys; if the supply of salt in the diet of laying hens is insufficient, the body weight and egg weight will be reduced, and the number of eggs will be reduced. Not only should there be salt in the feed of livestock and poultry, but also salt should be added to the feed of fish, which can prevent intestinal disease of fish and increase food intake, which is beneficial to the growth of fish. The content of sodium and chlorine in plant feed is very small, which generally can not meet the physiological needs of livestock and poultry. Therefore, salt must be added to the feed. On average, each finishing pig eats 3-6 grams of salt per day, pregnant sows eat 6-9 grams, lactating sows eat 19-26 grams, and chickens eat 0.3% of the feed. Reply "hl43802960 Thank you!" Sodium chloride (salt) plays an important role in regulating body fluid acid-base balance, maintaining osmotic pressure balance between cells and blood, stimulating saliva secretion, participating in gastric acid formation and promoting digestive enzyme activity. As a seasoning, salt can improve the palatability of feed, enhance appetite, help digestion and absorption of nutrients, and improve feed utilization. The addition amount in pig diet is 0.25%-0.35%, and excessive amount will cause salt poisoning.