铁的作用和缺失（The role and absence of iron）
血红蛋白中的铁, 对于维持机体每个器官和每种组织的正常生理作用是不可缺少的, 也在参与氧的运输、氧化酶( 如过氧化氢、过氧化酶、黄素蛋白酶) 和细胞色素中起重要作用。
机体若贮铁或摄铁不足, 或因寄生虫感染失铁, 或红细胞分解速度大于合成速度, 则出现缺铁性贫血
母猪奶中铁的浓度很低, 约为1 mg/ kg,
仔猪在出生后头3 d 一次注射150~200 mg 铁，比如桃源兽药厂生产的富铁力注射（1－1.33ml每次）。
Iron has many functions for animals.
The iron in hemoglobin, which is essential for the normal physiological function of every organ and tissue in the body, also plays an important role in the transport of oxygen, the enzymes ( hydrogen peroxide, peroxidase, flavin protease) and cytochrome.
Iron deficiency anemia occurs if the body stores iron or takes insufficient iron, or loses iron due to parasitic infection, or the rate of red blood cell breakdown is greater than the rate of synthesis
Why should the newly born pig supplement iron
Piglets are the most vulnerable to iron deficiency.
Piglets at birth = 47mg iron, but need 7mg iron per day;
The body weight doubled in 10-14 days and the growth rate was fast.
Sow milk has a very low concentration of iron, about 1 mg/ kg,
3 days of age need iron supplement. (Iron supplement twice at 3 and 12 days of age)
Piglets are injected with 150-200 mg of iron at a time during the first 3 days after birth, such as the FuTieLi iron dextran injection produced by Taoyuan Veterinary Drugs Factory (1-1.33ml each time).