Abstract: Studies on biomass and productivity of Pinus sylvestriformis plantation with relativegrowth and quadrat-harvesting methods show that the total biomass and the total net production of the community are respectively 111.982t·ha^-1 and 8942.80kg·ha^-1·yr^-1, and those of tree, shrub and herb layers are respectively 106.150, 2.230, 2.264t· ha^-1 and 7465.00, 223.00, 1182.00kg· ha^-1·yr^-1, each occupying by 94.79, 1.99, 2.02% and 83.47, 2.49, 13.22% of the total.The biomass of littet layer is 0.364t· ha^-1 and that ofdead standing tree is 0.974t·ha^-1.These data show that tending felling must be taken to regulate the production structure of the community, to enhance the integrated functionsof forest ecosystem and to breed an excellent fast-growing and high-yield forest.

Key words: Pinus sylvestriformis plantation, Biomass, Productivity