The role of zinc methionine in animal nutrition

As we all know, zinc is one of the essential trace elements in animal body, and it is a component of various metalloenzymes and insulin. It is called "life element" because it has a wide range of physiological and biochemical functions in the body. In traditional breeding, zinc in animal diets is provided in the form of inorganic salts. In recent years, during the breeding process, many farms have What is the effect of zinc methionine by adding zinc methionine ? The following small series will introduce the role of zinc methionine in animal nutrition in detail. The zinc methionine benefits in animals The effect of zinc methionine on chickens Under intensive production conditions, organic zinc can improve the immune function of chickens. Feed conversion rate, mortality rate, and foot deformity rate of 120-day-old turkeys fed with zinc methionine and manganese methionine are all high. has been improved. The same 45-day-old broilers fed zinc methionine and manganese methionine also had significant improvements in feed conversion ratio, breast meat mass, bone ash content, and skin lesions. Effects of zinc methionine on pigs The nutritional effects of zinc on pigs mainly include the following aspects: the effect on the synthesis and activity of enzymes in pigs; the relationship with pigs' appetite, nutrient digestion, material metabolism and growth; on the reproduction of pigs and immune effects. According to research, zinc methionine has different degrees of improvement in the above aspects. Adding zinc methionine to the diet of finishing pigs increased the average daily weight gain by 9.7%, the feed utilization rate by 3.3%, and the slaughter rate and lean meat rate were improved. The effect of zinc methionine on rabbits The addition of zinc methionine to the diet of meat rabbits has obvious weight gain effect. Methionine chelated zinc has good chemical and biological stability due to the coexistence of ionic bonds and coordination bonds in its chemical structure. In the pH environment of the body, it has good solubility and is easy to release zinc ions, so it is easily absorbed by the body. The absorption speed is 2 to 3 times faster than that of inorganic zinc, and the biological effect is also higher than that of inorganic salts. After feeding zinc methionine, it can meet the body's demand for zinc. When the body absorbs zinc, methionine is also absorbed, so it can promote the growth and development of meat rabbits. The test thinks that it is more appropriate to add about 50 mg per kilogram. It is also reported that zinc is an essential element to maintain the activity of mononuclear phagocytic cells (MNP), which can engulf pathogens. Therefore, zinc can affect the indirect cellular defense system of meat rabbits, improve the immune function of rabbits, and play a role in preventing diseases. . Effects of zinc methionine on sheep Different zinc sources had no significant effect on the amino acid composition of sheep rumen chyme, but had a significant effect on the amino acid composition entering the duodenum. Zinc methionine has a certain function of passing through the rumen and has a protective effect on methionine. Compared with zinc oxide, zinc methionine has the effect of reducing the pH value of rumen juice and stabilizing the concentration of rumen ammonia. Zinc methionine can also improve the humoral and cellular immunity of sheep. effect. It has also been reported that when lambs were fed a purified zinc-deficient diet, the bioavailability of zinc methionine and zinc oxide were similar based on blood zinc concentration, alkaline phosphatase and livestock performance, but the secretion of urinary zinc in the group fed zinc methionine was similar. tended to decrease, while the deposition of zinc increased; when the lambs received high levels of zinc methionine or zinc oxide daily, the blood zinc concentration of the lambs who received zinc methionine decreased faster to the concentration before oral administration. It can be seen that the absorption degree of zinc in zinc methionine and zinc oxide is similar, but the metabolism after absorption is significantly different. Factors affecting the application effect and evaluation of zinc methionine Product quality of zinc methionine The product quality of zinc methionine refers to the proportion of zinc methionine in the product and its complexing strength, which are the primary factors affecting the effect of zinc methionine. But so far, there is no reliable method to identify its complexation rate or complexation strength. The physical condition of the experimental animals When a certain trace element is lacking, appropriate or excessive in the animal, the utilization efficiency of the corresponding element is different. When a certain element is deficient in the body, the utilization rate of the corresponding trace element will increase, thereby narrowing the gap between the utilization rate of zinc methionine and the corresponding inorganic zinc; on the contrary, when a certain trace element is excessive in the body, the absorption mechanism is different from that of the body when it is deficient. , the availability of the corresponding element will decrease, and it may be easier to compare the availability gap between zinc methionine and inorganic zinc sources. In addition, factors such as the health status of animals and differences between groups will also affect the accuracy of the test results. Diet composition and its combined effects In the study of zinc methionine, the experimental basal diets were different. It is well known that the lack of mineral elements, the lack of dietary protein or amino acids, or the combined effects of various dietary components will affect the production performance of livestock and poultry. Form of Inorganic Reference In many experiments, the inorganic reference used was mostly zinc oxide. Although its cost is low, its utilization rate is significantly lower than that of zinc sulfate due to its poor solubility in the digestive tract, thus exaggerating the effect of zinc methionine to a certain extent. It is known that the absorption mode of trace elements in the digestive tract varies with different dosages. The absorption of zinc in the intestinal tract at low doses is an active carrier transport process, while at high doses, it is mainly a passive diffusion process. Due to the steady mechanism of the body, the absorption of trace elements by animals is not always in a linear relationship with the concentration of trace elements, but in a gradual relationship. Therefore, in some experiments, the low-dose zinc methionine and high-dose inorganic zinc may have the same absorption in the digestive tract due to the stable mechanism of the body, so the problem cannot be scientifically explained. The correct method should be to compare the differences in the feeding effects of zinc methionine and inorganic zinc on animals at the same dose level. The above content is a detailed introduction to the role of zinc methionine in animals. In fact, adding zinc methionine can improve the growth, reproduction and health of animals, and can promote the rapid proliferation of taste bud cells in the tongue mucosa, regulate appetite, inhibit some harmful bacteria in the intestines, and prolong food. The residence time in the digestive tract can improve the secretion function of the digestive system and the activity of enzymes in tissue cells.