松密度又称堆密度，在微粉学中，指单位容积的质量。这里的容积是指微粒及微粒间空隙所占的总容积(即松容积)，轻质的药品松密度小，重质的药品松密度大，松密度小的微粒孔隙率大，松密度大的微粒孔隙率小。
采集贵州省龙里林场马尾松密度试验林15年生马尾松木材，5种造林密度，研究造林密度对马尾松管胞形态及其径向变异的影响。
The tracheid form and radial variance were studied for 15 years Masson pine plantations with five different planting densities in Longli, Guizhou.
结果表明，造林密度对马尾松管胞形态总平均值影响不大，方差分析不显著；
The results show that the average value of tracheid form can not be affected by the planting density through variance analysis .
结论：中药骨松康胶囊能够增加骨密度，改善微循环，对更年期综合征患者有明显的治疗作用。
CONCLUSION: Traditional Gusongkang capsule can increase bony density and improve microcirculation, and has obvious curative effect in patients with climacteric syndrome.
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