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This paper deals with the chemical components and the chemical structure of lignin of Chinese fir and Poplar I-214 from plantationforest. The results revealed that the contents ofchemical component in heart wood and sapwood were almost the same except ethanol-benzene extract both in Chinese fir and in Poplar I-214, The contents of ash, holocellulose, α -cellulose, pentosan, ethanol-benzene extract and cold-water extract in Poplar I-214 were higher than that in Chinesefir, The content of lignin in Poplar I-214 was lower than that in Chinese flr. Vanillin, vanillic acid and p-hydroxybenzaldehyde were found in Chinesefir while vanillin and vanillic acid, p-hydroxybenzoic acid, syringaldehyde and syringic acid werefound in Poplar I-214 in investigation of the chemical structure of lignin by using nitrobenzene oxidization method.
This paper deals with the chemical components and the chemical structure of lignin of Chinese fir and Poplar I-214 from plantationforest. The results revealed that the contents of chemical components in heart wood and sapwood were almost the same except ethanol-benzene extract both in Chinese fir and in Poplar I-214, The contents of ash, holocellulose, α -cellulose, pentosan, ethanol-benzene extract and cold-water extract in Poplar I-214 were higher than that in Chinesefir, The content of lignin in Poplar I-214 was lower than that in Chinese flr. Vanillin, vanillic acid and p-hydroxybenzaldehyde were found in Chinesefir while vanillin and vanillic acid, p-hydroxybenzoic acid, syringaldehyde and syringic acid were found in Poplar I-214 in investigation of the chemical structure of lignin by using nitrobenzene oxidization method.