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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。
The physical and mechanical properties of Pinus elliottii under different thinning intensities and different planting densities were studied. The results showed that the radial variations of annual width, latewood rate and basic density of the slash height under different thinning treatments were basically the same. Different thinning intensities had significant effects on the width and mechanical properties of the rings, but had no significant effect on the latewood and dry shrinkage rates. Among them, 45% thinning could not only accelerate the growth of P. elliottii significantly, but also improve the mechanical properties without any significant effect on density and shrinkage. Planting density had significant effects on individual plant volume, total dry shrinkage rate and mechanical properties of wetland, but had no significant effect on air dry density. Among them, Pinus elliottii with 3.5 m × 3.5 m grew rapidly and its mechanical properties were improved.