This enzyme has the potential to increase digestibility of fiber by separating hemicellulose from lignin. Kang et al. (2009) reported that addition of L. buch- neri PTA6138, with known ferulic acid esterase activity, plus Lactobacillus casei PTA6315 to whole plant corn at ensiling improved in situ aNDF-D in one of two corn silage hybrids. It is unknown if L. buchneri 40788 (used in the current study) possesses this characteristic. Although LBLP and LBPA improved aNDF-D, for unknown reasons, the combination with LBPP