Whether or not to add salt?

NutrientRequirementsOf Warmwater FishAndShellfishs (1983): it is generally believed that sodium, potassium and chloride are necessary for many physiological processes, including osmotic regulation, acid-base balance, hydrochloric acid secretion in the stomach, maintenance of membrane potential, and transmission of nerve impulses. However, the lack of fish diet has not been confirmed, the vast majority of fish diet contains enough of any element. Both seawater and fresh water contain rich and appropriate amounts of sodium, potassium and chloride ions, which are absorbed directly from the water by freshwater fish through their gills, whereas marine fish obtain these minerals through drinking water. Sakamoto and Yone (1978) found that red sea bream did not respond to the addition of potassium and sodium when they ate diets with very low levels of these minerals. Well, there has been no shortage of salt in our company's fish. No problem-Murray and Yone (1979) used a practical diet containing 0.06% sodium and 0.17% chlorine, fed channel catfish in water containing chlorine and sodium respectively, and added different levels of salt to 2% of the diet. Although fish fed with salt grew faster than those fed basic diet (60.8%), the effect of salt on growth, feed conversion rate and body water content was not statistically significant. -- Channel catfish can not add salt, otherwise it is easy to add color ah-- does the feed for livestock and poultry need to be added? -- definitely-- but pay attention to the amount added. At present, some manufacturers of aquatic feed add salt, while others do not add salt. It's good to add the right amount of salt to the feed of freshwater farmed varieties-- it's a good topic. Learned-- in livestock and poultry feed The addition of salt is very important. In the aquatic feed, there are some technical personnel added, some technical personnel do not add, please tell us the reasons.