对不同间伐强度和不同种植密度处理下的湿地松的物理力学性质进行研究。结果表明，不同间伐处理的湿地松的胸高处年轮宽度、晚材率和基本密度的径向变异规律基本一致。不同的间伐强度对年轮宽度、力学性质影响显著，对晚材率和干缩率影响不显著。其中45%间伐处理不仅可以显著加快湿地松的生长，而且可以提高力学性能，并且对密度和干缩性没有显著性影响。种植密度对湿地松单株材积、全干缩率和力学性质都有显著性影响，而对气干密度没有显著性影响。其中3.5 m×3.5 m处理的湿地松不仅生长迅速，而且其力学性能有所提高。
In this paper, physical and mechanical properties of Pinus elliottii with different thinning intensities and planting densities were studied. The results show that the radial variances of annual ring width, percentage of late wood and basic density with different thinning intensities are almost the same. The effect of thinning intensity on annual ring width and mechanical properties is significant, while that on percentage of late wood and shrinkage is not significant. 45% thinning intensity can not only accelerate the growth of Pinus elliottii significantly, but also improve the mechanical properties, and have no significant effects on density and shrinkage. The effect of planting density on volume, total shrinkage and mechanical properties is significant, while that on air density is not significant. Pinus elliottii with 3.5 m×3.5 m planting density not only grow rapid, but also have relatively high mechanical properties.