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对 2 9年生的一代杉木人工林采伐时的林分生物量积累和分布进行了研究 ,结果表明 ,试验区 2 9年生杉木最大木、平均木和最小木单株各器官生物量分配比率大小顺序均为 :干 >根 >皮 >枝 >叶 ,并且干和皮器官的分配比率均较为接近 ;林分中不同径阶杉木单株各器官生物量的分配比率差异不是太大 (除了最大木的叶比率略小、枝的比率较大外 ) ,用平均木的各器官生物量来估计林分各器官生物量总量完全能满足精度要求 ;密度对林分乔木层生物量的影响较大 ;叶、干生物量及其分配比率随着密度的增大而增大 ,枝、皮生物量分配比率随密度的增大而减小 ;地被物生物量基本上是随着林分地位指数的提高、林分密度和郁闭度的降低而增加的
The biomass accumulation and distribution of stands of 29-year-old Chinese fir plantation were studied. The results showed that the order of the biomass allocation rate of the largest, average and smallest wood plants The results showed that the distribution rates of dry matter and bark organs were all close to each other. The differences in biomass distribution among different orders of Chinese fir plantations were not significant (except for the largest wood Leaf ratio is slightly smaller, and the ratio of branches is larger). Using the biomass of each organ of average wood to estimate the total biomass of each organ of stand can fully meet the requirements of precision. Density has a great influence on the biomass of stand tree layer. The leaf biomass, dry biomass and its distribution ratio increased with the increase of density, and the biomass allocation rate of branches and shoots decreased with the increase of density. The biomass of ground cover was basically the same as the stand index Increase, stand density and canopy density increased