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Food preservatives are a type of food additives that prevent food spoilage due to the action of microorganisms and prolong the shelf life of food. Its anti-corrosion mechanism is mainly to reduce the water activity of the product, reduce the PH of the product, act on the specific structural parts of the microorganism, destroy the growth of the microorganism or the normal progress of the metabolic system, thereby inhibiting the growth of the microorganism and prolonging the shelf life of the product.

The disease of broiler chickens should be detected in time, treated early, diagnosed early, and controlled early, so as to minimize the stress caused by the disease and ensure the healthy growth of broiler chickens.

Feed additives are small amounts of nutritive or non-nutritive substances added to the feed to meet the special needs of animals. The development of modern intensive aquaculture has made feed additives play an increasingly important role in poultry feed processing. Rational use of feed additives can increase feed utilization, prevent diseases, promote healthy growth of poultry, improve product quality, enhance product competitiveness, and create better economic efficiency.

Vitamin C is a polyhydroxy compound with the chemical formula C6H8O6. The structure is similar to that of glucose, and the two adjacent enol hydroxyl groups at 2. and 3. Positions in the molecule are easily dissociated to release H, so that it has the property of an acid also known as L-ascorbic acid.