| Abstract
| - Pyrolysis/gas chromatography/mass spectrometry (PY/GC/MS) andhigh-performance liquid chromatography with electrochemical detection (HPLC−ED) were carried outon stover samples fromten commercial maize hybrids grown in northern Italy. Theobjective was to check whether thecomposition of the cell wall lignin and polysaccharides, as obtained byPY/GC/MS, and the phenolicacid content, as determined by HPLC−ED, were significantly differentin the various hybrids.Neutral detergent fiber (NDF) and crude protein content were alsodetermined. Thirty pyrolysisfragments were identified mainly deriving from polysaccharides andlignin. Vanillic, p-coumaric,and ferulic acids were quantified by HPLC−ED. Analysis ofvariance and the Waller−Duncan testshowed significant differences in all the examined parameters.Correlations were also found amongNDF, PY/GC/MS lignin markers, p-coumaric, and ferulic acidsand among vanillic acid, p-coumaricacid, and PY/GC/MS lignin markers. Keywords: Maize stover; lignin; phenolic; pyrolysis/gas chromatography/massspectrometry; liquidchromatography
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