Chromium is an essential micro mineral and plays a major role in livestock and poultry nutrition. Several varieties of Cr exist, but Cr from yeast (Cr-yeast), Cr picolinate (Cr Pic) and chromium chloride (CrCl3) have been cited mostly for their biological activities. Chromium (Cr) is one of the transition element and occurs in valancies of +2, +3 and +6. The hexavalent chromium is inorganic and found to be toxic with poor absorption while trivalent chromium is organic with better bioavailability It is an informative guide and explains more about chromium in poultry nutrition. Это и многое другое вы найдете в книге Effect of chromium on production performance in Japanese quails (G.P. Moghana Priya, P. Veeramani, Pasupathy Karu)