The objective of the current work was to evaluate silage quality throughout the storage
period. Silages of wheat from flowering and milk stages and of corn were prepared in
1.5 L anaerobic jars. The silages were sampled from one week until one year after ensiling.
Lactic acid concentration peaked one to three months after ensiling while that of acetic acid
increased constantly; the aerobic stability of the silages improved with time. Dry matter
losses reached maximal levels between 3 and 6 months of storage; digestibility of DM and
NDF tended to decrease with time. The results indicate that when using silages shortly after
ensiling, the pH values might still not be low enough and aerobic stability is poor. Prolonged
storage might result in decrease in DM and NDF digestibility values.