he Sociological Characteristics of Pinus Koraiensis forests,P. sibirica forests,P.grif-fithii forests,P. pumila forests,P.fenzeliana forests,P. kawangtungensis forests and P.ar-mandii are analyzed. Biomass, net productivity and its distribution in various lavers of theforests dominated by P. koraiensis or P. armandii are analyzed.The ratio of net productivityand biomass(NP/B)in various distribution regions of P. koraiensis or P. armandii are stud-ied, The results show (1 ) : that biomass and net productivit...