The use of reliable products of amino acid additives is of great importance and high price, 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, Ajinoin lysine additive.
When purchasing such additives, carefully observe the packaging, appearance, smell, color, etc. of the product, and identify and judge. Do not use products that are suspected, so as not to affect the quality of the feed and cause economic losses. Amino acid additives are mostly used in poultry feeds, especially in the young developmental stage of animals, while anti-animal animals such as cattle and sheep can not use the difference between limiting amino acids and non-limiting amino acids because they can use microorganisms to synthesize various amino acids. Amino acid feed additives. The utilization rate of chemically synthesized amino acids in aquatic animals is still controversial. Some studies and experiments have reported that the chemically synthesized amino acids are not highly utilized in fish. Therefore, it is better to use such additives with caution in aquaculture-based compound feeds.
Master the effective content and potency, such as lysine feed additives, mostly L-lysine hydrochloride, the content is more than 98%, the actual L-lysine content is about 78%, and the potency can be calculated as 100%; The potency of DL-lysine can only be calculated at 50%. Methionine feed additive has
DL-methionine, methionine via analogs and N-methylmethionate calcium, and the like. The effective content of DL-methionine is more than 98%, and its titer is calculated at 100%; the titer of methionine by base analog is equal to 80% of DL-methionine; and the methionine content of N-methylmethionine calcium It is about 67%. Therefore, in the actual application of amino acid additives, the effective content and potency should be converted first to prevent excessive and insufficient addition.
Balanced use to prevent antagonism of amino acid balance means that the variety and concentration of amino acids in the feed meet the nutritional needs of the animal. If the proportion of amino acids in the feed is unreasonable, especially if the concentration of one amino acid is too high, it will affect the absorption and utilization of other amino acids, and the overall utilization of amino acids will be reduced. This is also called the antagonism of amino acids.
The amino acids used in feed additives are generally essential amino acids, particularly the first and second limiting amino acids. Animals also have a property of amino acid utilization, that is, only the first limiting amino acid is satisfied, the second and other limiting amino acids can be 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 acids are higher, only 70% of the required amount can be utilized. Therefore, in the application of amino acid additives in feed, the first limiting amino acid should be considered first, followed by other limiting amino acids.
The first and second limiting amino acids are currently considered primarily in the formulation of feed formulations. The first limiting amino acid of the pig is lysine, the second limiting amino acid is methionine; and the first limiting amino acid of the bird such as chicken is methionine, and the second limiting amino acid is lysine. Therefore, when applying amino acid additives, it should be based on the type of livestock and poultry, and should not be blindly added. Otherwise, it may be counterproductive, affecting production performance and causing waste.
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