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采用 2 90块标准地调查资料 ,分析了 I- 6 9杨胶合板用材林的产量和生物量结构随立地指数和造林密度的变化规律。胶合板材产量随立地指数的增大而增大 ,且占总产量的百分比在立地指数为 14、16、18m时 ,随造林密度的增大而减小 ;当立地指数为 2 0 m和 2 2 m时 ,保持稳定在 50 %左右。磨木浆材和化学浆材产量随立地指数和密度的增大而增加。在立地指数为 14、16、18m时磨木浆材产量占总蓄积量的百分比和化学浆材产量占总蓄积的百分比均随造林密度的增大而增大 ;在立地指数为 2 0、2 2 m时则受造林密度的影响不大 ,分别保持在 30 %和 2 0 %左右。林分和单株的树干、树枝、树皮生物量组成比例均随立地指数、造林密度的变化无明显的差异。营造 I- 6 9杨胶合板用材林时选择立地指数 2 0、2 2 m的地段以及用造林密度 156 (8m× 8m)、2 0 4 (7m× 7m )株·hm-2 为最佳。
Based on the survey data of 2 90 standard plots, the variation of yield and biomass structure of I-6 9 poplar woods with site index and plantation density was analyzed. The yield of plywood increased with the increase of site index, and the percentage of total output decreased with the increase of plantation density when the site index was 14, 16 and 18 m. When the site index was 20 m and 22 m, remained stable at about 50%. Wood pulp and chemical pulp production increased with increasing site index and density. When the site index was 14, 16, 18m, the percentage of the total volume of groundwood pulp and the percentage of chemical pulp production in the total volume increased with the increase of planting density. In the case of the site index of 20,2 However, the effect of afforestation density was not significant at 2 m, which remained at 30% and 20% respectively. The stand biomass, biomass and biomass of the stand and the individual plant had no significant differences with stand index and plantation density. In order to create I-6 9 poplar timber forest, the site with the site index of 20,22 m and the optimal plantation density of 156 (8m × 8m) and 204 (7m × 7m) hm-2 were selected.