Nutritional characteristics of Feed Additives in Pig Feed

   feed additive is a variety of trace components added in the preparation of diets. Although natural feed contains nutrients needed by all kinds of pigs, such as protein, carbohydrates, fats, minerals and various vitamins, it does not necessarily meet the needs of pigs. In a small amount of feeding by farmers, pigs can find the necessary nutrients in the soil, and the feed can be simply mixed; but in intensive pig farms, feed additives must be added to the diet to achieve the full price of the diet, so as to improve its utilization rate and promote pig health.

   can be divided into two categories according to its function: nutritional and non-nutritive additives.

   (1) nutritional additives are mainly used to balance or strengthen dietary nutrients, including amino acids, trace elements and vitamins.

   1, amino acid additives: at present, synthetic lysine and methionine are commonly used, followed by tryptophan, threonine and so on. Its main physiological function is to give full play to the potential of pig production performance and save protein feed, especially under the condition of closed pig house, it also has the effect of reducing pig fat deposition, improving carcass quality and increasing lean percentage. In addition, it has been proved that the use of amino acids can reduce the physiological maladaptation of pigs due to changes in the external environment or other stimulating factors, that is, stress. For example, when dietary methionine is added to the diet, salty pigs fight with each other under group feeding conditions, and tryptophan prevents piglets from biting each other's tails when weaning or density is too high.

   must point out that when preparing diets, we must first determine which amino acids in the diet combination are restricted amino acids, and then select the corresponding amino acid additives. There is a lack of lysine in feed such as grain, bran and cake, so lysine should be added. Methionine should be added if soybean meal is the main source of protein, and the amount of methionine should depend on the content of natural feed and the requirement of pigs.

   2, trace element additives: at present, the market is mainly compound trace elements, which mainly contain iron, copper, manganese, zinc, iodine, selenium and other elements. These elemental sulfates, carbonates, chlorides and oxides are usually used. The dosage is as follows: iron 50g 400g, copper 5g 250g, manganese 20g 60g, zinc 40g 140g, iodine 1g 4g, selenium 1g 1.5g.

Due to the small amount of trace elements, it is difficult to mix    into the feed, and even cause poisoning due to excessive local content. Therefore, it should be mixed with carriers and diluents, so it is also called trace element premix.

   3, vitamin additives: this kind has a single, compound preparation. Under the condition of intensive feeding of pigs, the use of compound feed and the lack of excessive amount of green succulent feed will cause vitamin deficiency, so it is necessary to use vitamin complex. Imports are Tedvita, online production of multivitamin preparations. Add 100g to 120g per ton of feed.

   would like to explain that if farmers or small-scale pig farms, try to make Sichuan green succulent feed, and reduce vitamin additives, which can reduce the cost of raising pigs.

   (2) non-nutritional additives mainly include health growth promoters, anti-mildew and antioxidants. As a feed additive, antibiotic preparation should be widely used in pig industry, and the effect is obvious. Health agents are mainly sulfonamides, which can prevent the occurrence of diseases under the condition of intensive feeding. Antioxidants and anti-mildew agents are mainly used to prevent feed oxidation and mildew deterioration.