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通过对 14个切根密度苗的研究得出樟子松切根苗密度不同 ,质量也不同 ,苗木的径根比随密度的增大而增大 ;苗大的干物质随密度的增大而降低 ,地上部分干物质大于地下部分干物质 ;造林成活率随径根比的减小而增大 ;苗木密度在 12 0～ 2 2 0株 m2 之间是苗木质量较好且获得较大效益的合理密度 ;苗圃可根据经济评价指标确定适合自己的合理密度。
Through the study of 14 rootstocks with cut root density, the density of cut rooted seedlings of Pinus sylvestris var. Mongolica is different and the quality is also different. The root-root ratio of seedlings increases with the increasing of density. The dry matter of large seedlings decreases with the increasing of density , The dry matter in aboveground part was greater than the dry matter in underground part, and the survival rate of afforestation increased with the decrease of diameter to root ratio. The density of seedling was between 120 and 220 m2, which was the better quality and more effective Density; nursery according to economic indicators to determine the appropriate density for their own.