Thursday, May 25, 2017
Xingjia Bio-Engineering Co, Ltd
Trace elements consist of Fe, Zn, Cu, Mn, I, Se, Co, Cr etc, accounting for less than 0.01% of the total body weight only. As aminoacids and vitamins, the trace elements are the essential nutrition additives in feeds, especially Fe, Zn and Mn which are called "biological Metal". See Table 1-1, 1-2
