Geographic Pattern of Chemical Components in Wood and Pulp/Paper-making Properties in Natura1 Stands of Masson Pine

Through analysizing on the chemical components in wood and pulp/paper-making properties of l4 natural populations covering over the distribution range of massonpine,it was found that there exisit latitudinaI trends for pentosan and ash content in woodand tensile,burst and tear strength of paper which are less effected by the longitude.Comparing the natural stands from the north,the ones from the south possessed less pantosanand ash content,higher Kappa value of pulp under the same pulping conditions,lower tensile and burst index and higher tear index. No definite geographic patterns were exisited for-α-cellulose,lignin,alcohol-benzene extractives content in wood and pulp yield.The ash content and paper tear index was found to be also influenced by tree age. The age effects of theother traits were small.