Use reliable products Amino acid additives have a major role, the price is high, and most of them are imported products, so they should be carefully selected to prevent counterfeiting. In general, the production process of imported products is more advanced and the quality is more reliable. Such as Japan's Concord, Ajinomoto lysine additives; Japan's Soda, Germany's Digasha, France's Rhone Prancer and other methionine additives. When you purchase such additives, you should carefully observe the packaging, appearance, smell, and color of the product to identify and judge. Don't use products that are in doubt so as not to affect the quality of feed and cause economic losses. Amino acid additives are mostly used in livestock feed, especially in the young development stage of animals, while animals such as cows and sheep are able to use microorganisms to synthesize various amino acids. There is no difference between limiting amino acids and non-limiting amino acids. Use amino acid feed additives. The utilization of chemically synthesized amino acids in aquatic animals is controversial. Some studies and experiments have reported that the utilization of chemically synthesized amino acids in fish is not high. Therefore, it is better to use this type of additive with caution in aquatic feeds. Master effective content and potency For example, the lysine feed additive is mostly L-lysine hydrochloride, and the content is more than 98%. The actual L-lysine content is about 78%, and the titer can be calculated as 100%; and DL-lysine. The potency can only be calculated at 50%. Methionine feed additives include DL-methionine, methionine-based analogs, and N-methyl methionine calcium. The effective content of DL-methionine is more than 98%, and its titer is calculated as 100%; the titer of methionine-based analogues is equal to 80% of pure DL-methionine; and the content of methionine of methyl methionine is N. About 67%. Therefore, in the practical application of amino acid additives, the effective content and potency should be converted to prevent excessive and insufficient addition. Balanced use to prevent antagonism Amino acid balance refers to the variety and concentration of amino acids in feed that meet the animal's nutritional needs. If the proportion of amino acids in the feed is unreasonable, especially if the concentration of certain amino acids is too high, the absorption and utilization of other amino acids will be affected, and the overall utilization of amino acids will be reduced. This is also called amino acid antagonism. The amino acids used in feed additives are generally essential amino acids, especially the first and second limiting amino acids. The use of amino acids by animals also has the property that only the first limiting amino acid is satisfied, and the second and other limiting amino acids are better utilized, and so on. If the first limiting amino acid can only meet 70% of the required amount, and the second and other limiting amino acid content is higher, it can only use 70% of the required amount. Therefore, in the application of amino acid additives in feeds, the first limiting amino acid should be considered first, followed by other limiting amino acids. Currently, the first and second limiting amino acids are mainly considered when formulating feed formulations. The first limiting amino acid of pigs is lysine and the second limiting amino acid is methionine; while the first limiting amino acid of birds such as chickens is methionine and the second limiting amino acid is lysine. Therefore, in the application of amino acid additives, should be based on the type of livestock and poultry, comprehensive, balanced considerations, do not blindly add, otherwise it may backfire, affect the production performance, and cause waste.
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