Effect of storage duration on the nutritional value of corn kernels for broiler chicks

A study was carried out to evaluate the effect of storage duration of corn on its chemical composition (DM, protein, fat, amino adds, and fatty acids) and nutritional value for chicks, with an emphasis on AME(n). Freshly harvested whole, grains were stored for 110 mo in covered galvanized iron cans, kept inside a storehouse. The AME(n) content of the grains was determined in 10 experiments in which the corn was incorporated in a diet designated for the evaluation of AME(n) by the substitution method. These determinations were carried out with male broiler chicks at 15 to 17 d of age. The chemical composition of the grains did not change during storage, except for a significant (P < 0.02) increase in lysine and a decrease in valine levels. Moreover, the AME(n) content was not affected significantly (P > 0.05) by storage duration. It is concluded, therefore, that storing corn grains for 110 mo, under proper conditions, does not adversely affect their nutritional value.