林分密度对木麻黄人工林木材性质的影响

对不同林分密度木麻黄人工林木材材性的测定和比较分析表明,木麻黄人工林木材密度、干缩系数和力学强度随着林分密度的提高而增大,差异干缩随着林分密度的提高而减小。林分密度的提高增大了木麻黄人工林木材密度、干缩性和力学强度的波动性。差异显著性t检验表明,林分密度2250与2700株.hm-2处理间木麻黄人工林木材密度、干缩性和力学强度差异均不显著;而1800与2250株.hm-2处理间、1800与2700株.hm-2处理间木麻黄人工林木材密度、干缩性和力学强度的差异显著性因指标而异。

Effects of forest stand density on wood properties of Casuarina equisetifolia plantations

Wood properties of Casuarina equisetifolia plantation with different stand density were determined and analyzed comparatively.The results showed that the density,shrinkage coefficient and mechanical strength indexes increased as stand density increased while ratio of tangential shrinkage to radial shrinkage decreased as stand density increased.Furthermore,dispersion of the density,shrinkage and mechanical strength for C.equisetifolia wood from plantation increased as stand density increased.Different significant t test showed that there was no significant difference of the density,shrinkage coefficient and mechanical strength indexes between C.equisetifolia wood from plantations with the stand density of 2250 individual·hm~(-2) and 2700 individual·hm~(-2) while significant ones varied with the density indexes,shrinkage coefficient indexes and mechanical strength indexes between the stand density of 1800 individual·hm~(-2) and 2250 individual·hm~(-2) or 2700 individual·hm~(-2).