以硫酸亚铁为代表的无机铁盐补铁剂，由于无机铁盐容易与饲料中的脂肪和维生素等发生反应，从而降低饲料的营养价值。有些无机铁盐还对动物机体消化道具有刺激作用，导致机体出现消化道疾病。此外，无机铁盐补铁剂化学性质活跃，在动物消化道中易受到其他因素的影响，因此其生物学利用率也较低。富马酸亚铁以及柠檬酸亚铁在内的简单的有机酸铁盐。相对于无机铁盐，简单的有机酸铁盐具有较好的溶解性和较高的生物学利用率，更易被机体吸收。饲料中添加富马酸亚铁可以提高仔猪日增重并降低其腹泻率。在母猪日粮中添加富马酸亚铁，其所产的仔猪在生长性能和血液指标上要显著优于硫酸亚铁组的仔猪。然而一些有机酸铁盐的应用效果不如硫酸亚铁的，效果不稳定。甘氨酸铁和赖氨酸铁等在内的氨基酸螯合铁，这类补铁剂中的铁离子以配位键的形式与氨基酸结合，形成具有环状结构的螯合物。与前两种补铁剂相比，氨基酸螯合铁生物具有利用率高、化学稳定性好和利于环保的特点，因而成了新型微量元素制剂研究的热点

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抗坏血酸锰Manganese Ascorbate、抗坏血酸亚铁Ferrous Ascorbate、赖氨酸甘氨酸镁Magnesium Lysinate Glycinate、甘氨酸谷氨酰胺镁Magnesium Glycinate Glutamine、柠檬酸苹果酸镁Magnesium Citrate Malate、柠檬酸锶Strontium Citrate、柠檬酸锰Manganese Citrate、柠檬酸铜Copper Citrate、天门冬氨酸锂Lithium Aspartate、牛磺酸硒Selenium Taurate

Amino acid chelated iron as animal iron supplement

The inorganic iron salt supplement represented by ferrous sulfate is easy to react with the fat and vitamins in the feed, thus reducing the nutritional value of the feed. Some inorganic iron salts also have a stimulating effect on the digestive tract of animals, resulting in digestive tract diseases. In addition, the inorganic iron salt iron supplement is chemically active and susceptible to other factors in the digestive tract of animals, so its biological availability is also low. Simple organic acid ferric salts including ferrous fumarate and ferrous citrate. Compared with inorganic iron salt, simple organic acid iron salt has better solubility and higher biological utilization rate, and is easier to be absorbed by the body. Adding ferrous fumarate to feed can increase daily gain and decrease diarrhea rate of piglets. When ferrous fumarate was added to sow diet, the piglets produced by ferrous sulfate group had significantly better growth performance and blood indexes than those in ferrous sulfate group. However, the application effect of some organic acid ferric salts is not as good as that of ferrous sulfate, and the effect is unstable. Amino acid chelate iron, including iron glycine and iron lysine, iron ions in this kind of iron supplement combine with amino acids in the form of coordination bonds to form a ring structure chelate. Compared with the first two kinds of iron supplements, amino acid chelated iron biological has the characteristics of high utilization rate, good chemical stability and environmental protection, so it has become a hot spot in the study of new trace element preparations

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Manganese Ascorbate, Ferrous Ascorbate, Magnesium Lysinate Glycinate, Magnesium glutamine Glycinate Glutamine, Magnesium Citrate Malate, Strontium Citrate, Manganese Citrate, Copper Citrate, Lithium aspartate Aspartate, Selenium Taurate.