The results show that the lignin of Populus deltoid wood is a GS type lignin (Residual lignin in its APMP pulps is the same type) with a content of S-56.81%, G-42.42% and H-0.77%.

• 结果表明：黑杨木材中的木质素属GS型木质素(纸浆残余木质素仍属GS木素)，而且紫丁香基型结构单元含量较高达56.；81%25，愈创木基结构单元42