The chemical component contents of 18-year-old Loblolly pine (Pinus teada L. ) pulpwood and its variation along the tree trunk were measured and analyzed. Results show that: 1) the average contents of ash, cold-water extractives, hot-water extractives, benzene-alcohol extractives, 1%NaOH extractives, cellulose, pentosan, and lignln are respectively 0. 33%, 1. 59%, 3. 21%, 2.32%, 13.66%, 47.98%, 15.10%, and 29.66%; 2) going upwards from the tree bottom, the change of the contents of ash and cellulose is not significant, the contents of hot-...