127.

Pommier SA, Lapierre H, de Passille AM, Gariepy C. Control of the bioavailibility of iron in heavy veal production by different feeding management systems: use of Ca-EDTA as an iron chelating agent. Can. J Anim. Sci. 1995; 75(1):37-44. (CA) Seventy male dairy black and white veal calves were allotted to five treatment groups: MILK, in which animals received exclusively milk replacer; MIX, in which animals received concs. ad lib and milk replacer during the whole period, more specifically, 750 g of milk powder d-1 starting at week 4; GRAIN, in which animals received milk replacer during the first 4 wk and concs. during the whole period; MIX+EDTA and GRAIN+EDTA, in which animals received the same diet as their resp. controls plus 15 mg of EDTA mg-1 of Fe in the concs. of the diet starting at week 4 of the expt. MILK-fed calves had better av. daily gains (ADG) than MIX-EDTA-fed or GRAIN+EDTA-fed calves. However, GRAIN+EDTA-fed calves had lower ADG than GRAIN calves. The EDTA treatments were without effect on feed efficiency and EDTA did not affect N digestibility or feed retention. Treatments with EDTA lightened the color of the meat reduced myoglobin and reduced muscle Fe. Diet reduced carcass fatness in the following decreasing order: MILK, MIX, GRAIN. Treatments with EDTA had no effect on carcass compn.

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