间伐强度对人工落叶松木材物理力学性质的影响

以东北林业大学帽儿山实验林场老山实验站的人工落叶松林为例，试验分析了重度间伐，轻度间伐和未间伐3种间伐强度对人工落叶松林木材物理力学性质的影响。结果表明：间伐对于人工林木材的物理力学性质有较大影响，影响程度与间伐强度有关，木材的物理力学性质中，生长轮宽，生长轮密度，顺纹抗压强度，抗弯弹性模量，横纹（全部、局部）抗压强度和冲击韧性等指标与间伐强度呈现正相关，所以适度间伐不仅能提高木材力学性质，而且可以加速树木生长，起到提高木材产量和质量的双重作用。

The Effect of Thinning Density on Wood Physical Mechanics Properties of Larch Plantation

Taking the larch plantation'at Laoshan Experimental Station. Maorshan Experimental Forest Farm of Northeast Forestry University as an example. the authors analyzed the effects of different thinning densities on the physical mechanics properties of larch wood. The results showed that thinning has great effect on the physical mechanics properties of larch wood and the effects are related to the thinning density. Thinning density has a positive correlation with some physical mechanics properties of larch wood such as the thickness and density of growth rings. crushing strength along tile grain. bending rigidity modulus. overall or local crushing strength across the grain. impact toughness. Therefore proper thinning would improve wood mechanics properties and accelerate the tree growth as well.